diff --git a/pandas/__init__.py b/pandas/__init__.py
index 82593a932d0dd..68ca20338e99b 100644
--- a/pandas/__init__.py
+++ b/pandas/__init__.py
@@ -207,7 +207,7 @@ def __getattr__(name):
         warnings.warn(
             "The pandas.np module is deprecated "
             "and will be removed from pandas in a future version. "
-            "Import numpy directly instead",
+            "Import numpy directly instead.",
             FutureWarning,
             stacklevel=2,
         )
@@ -218,7 +218,7 @@ def __getattr__(name):
     elif name in {"SparseSeries", "SparseDataFrame"}:
         warnings.warn(
             f"The {name} class is removed from pandas. Accessing it from "
-            "the top-level namespace will also be removed in the next version",
+            "the top-level namespace will also be removed in the next version.",
             FutureWarning,
             stacklevel=2,
         )
diff --git a/pandas/_libs/parsers.pyx b/pandas/_libs/parsers.pyx
index 25028b06f7bad..0c3918044a374 100644
--- a/pandas/_libs/parsers.pyx
+++ b/pandas/_libs/parsers.pyx
@@ -1000,7 +1000,7 @@ cdef class TextReader:
                 if col_dtype is not None:
                     warnings.warn((f"Both a converter and dtype were specified "
                                    f"for column {name} - only the converter will "
-                                   f"be used"), ParserWarning,
+                                   f"be used."), ParserWarning,
                                   stacklevel=5)
                 results[i] = _apply_converter(conv, self.parser, i, start, end)
                 continue
diff --git a/pandas/_libs/tslibs/nattype.pyx b/pandas/_libs/tslibs/nattype.pyx
index 268cdb80c22f3..4ff6be25127c8 100644
--- a/pandas/_libs/tslibs/nattype.pyx
+++ b/pandas/_libs/tslibs/nattype.pyx
@@ -143,7 +143,7 @@ cdef class _NaT(datetime):
                 return True
             warnings.warn(
                 "Comparison of NaT with datetime.date is deprecated in "
-                "order to match the standard library behavior.  "
+                "order to match the standard library behavior. "
                 "In a future version these will be considered non-comparable.",
                 FutureWarning,
                 stacklevel=1,
diff --git a/pandas/_libs/tslibs/offsets.pyx b/pandas/_libs/tslibs/offsets.pyx
index bb9d199023e9a..4c9b681452c0a 100644
--- a/pandas/_libs/tslibs/offsets.pyx
+++ b/pandas/_libs/tslibs/offsets.pyx
@@ -696,7 +696,7 @@ cdef class BaseOffset:
 
     def onOffset(self, dt) -> bool:
         warnings.warn(
-            "onOffset is a deprecated, use is_on_offset instead",
+            "onOffset is a deprecated, use is_on_offset instead.",
             FutureWarning,
             stacklevel=1,
         )
@@ -704,7 +704,7 @@ cdef class BaseOffset:
 
     def isAnchored(self) -> bool:
         warnings.warn(
-            "isAnchored is a deprecated, use is_anchored instead",
+            "isAnchored is a deprecated, use is_anchored instead.",
             FutureWarning,
             stacklevel=1,
         )
diff --git a/pandas/_libs/tslibs/timedeltas.pyx b/pandas/_libs/tslibs/timedeltas.pyx
index 59b62849484a6..43f9be3fef5ee 100644
--- a/pandas/_libs/tslibs/timedeltas.pyx
+++ b/pandas/_libs/tslibs/timedeltas.pyx
@@ -571,7 +571,7 @@ cdef inline timedelta_from_spec(object number, object frac, object unit):
         if unit in ["M", "Y", "y"]:
             warnings.warn(
                 "Units 'M', 'Y' and 'y' do not represent unambiguous "
-                "timedelta values and will be removed in a future version",
+                "timedelta values and will be removed in a future version.",
                 FutureWarning,
                 stacklevel=2,
             )
diff --git a/pandas/_libs/tslibs/timestamps.pyx b/pandas/_libs/tslibs/timestamps.pyx
index 5a3a95384e731..1094fac6d8504 100644
--- a/pandas/_libs/tslibs/timestamps.pyx
+++ b/pandas/_libs/tslibs/timestamps.pyx
@@ -171,7 +171,7 @@ cdef class _Timestamp(ABCTimestamp):
     @property
     def freq(self):
         warnings.warn(
-            "Timestamp.freq is deprecated and will be removed in a future version",
+            "Timestamp.freq is deprecated and will be removed in a future version.",
             FutureWarning,
             stacklevel=1,
         )
@@ -235,8 +235,8 @@ cdef class _Timestamp(ABCTimestamp):
             # We follow the stdlib datetime behavior of never being equal
             warnings.warn(
                 "Comparison of Timestamp with datetime.date is deprecated in "
-                "order to match the standard library behavior.  "
-                "In a future version these will be considered non-comparable."
+                "order to match the standard library behavior. "
+                "In a future version these will be considered non-comparable. "
                 "Use 'ts == pd.Timestamp(date)' or 'ts.date() == date' instead.",
                 FutureWarning,
                 stacklevel=1,
@@ -425,7 +425,7 @@ cdef class _Timestamp(ABCTimestamp):
                 warnings.warn(
                     "Timestamp.freq is deprecated and will be removed in a future "
                     "version. When you have a freq, use "
-                    f"freq.{field}(timestamp) instead",
+                    f"freq.{field}(timestamp) instead.",
                     FutureWarning,
                     stacklevel=1,
                 )
@@ -858,7 +858,7 @@ cdef class _Timestamp(ABCTimestamp):
         NaT
         """
         if self.nanosecond != 0 and warn:
-            warnings.warn("Discarding nonzero nanoseconds in conversion",
+            warnings.warn("Discarding nonzero nanoseconds in conversion.",
                           UserWarning, stacklevel=2)
 
         return datetime(self.year, self.month, self.day,
diff --git a/pandas/core/arrays/datetimelike.py b/pandas/core/arrays/datetimelike.py
index 8b5bda4629506..3402b9594e6dd 100644
--- a/pandas/core/arrays/datetimelike.py
+++ b/pandas/core/arrays/datetimelike.py
@@ -1186,7 +1186,7 @@ def _addsub_object_array(self, other: np.ndarray, op):
 
         warnings.warn(
             "Adding/subtracting object-dtype array to "
-            f"{type(self).__name__} not vectorized",
+            f"{type(self).__name__} not vectorized.",
             PerformanceWarning,
         )
 
diff --git a/pandas/core/arrays/datetimes.py b/pandas/core/arrays/datetimes.py
index 8513bbb044e83..17461ad95866e 100644
--- a/pandas/core/arrays/datetimes.py
+++ b/pandas/core/arrays/datetimes.py
@@ -744,7 +744,7 @@ def _add_offset(self, offset) -> DatetimeArray:
 
         except NotImplementedError:
             warnings.warn(
-                "Non-vectorized DateOffset being applied to Series or DatetimeIndex",
+                "Non-vectorized DateOffset being applied to Series or DatetimeIndex.",
                 PerformanceWarning,
             )
             result = self.astype("O") + offset
@@ -1186,8 +1186,8 @@ def to_perioddelta(self, freq) -> TimedeltaArray:
         # Deprecaation GH#34853
         warnings.warn(
             "to_perioddelta is deprecated and will be removed in a "
-            "future version.  "
-            "Use `dtindex - dtindex.to_period(freq).to_timestamp()` instead",
+            "future version. "
+            "Use `dtindex - dtindex.to_period(freq).to_timestamp()` instead.",
             FutureWarning,
             # stacklevel chosen to be correct for when called from DatetimeIndex
             stacklevel=3,
@@ -1353,7 +1353,7 @@ def weekofyear(self):
         warnings.warn(
             "weekofyear and week have been deprecated, please use "
             "DatetimeIndex.isocalendar().week instead, which returns "
-            "a Series.  To exactly reproduce the behavior of week and "
+            "a Series. To exactly reproduce the behavior of week and "
             "weekofyear and return an Index, you may call "
             "pd.Int64Index(idx.isocalendar().week)",
             FutureWarning,
diff --git a/pandas/core/arrays/sparse/array.py b/pandas/core/arrays/sparse/array.py
index b1cfcbd69a30b..68c9e42ef8e08 100644
--- a/pandas/core/arrays/sparse/array.py
+++ b/pandas/core/arrays/sparse/array.py
@@ -407,7 +407,7 @@ def __init__(
                 if is_datetime64tz_dtype(data.dtype):
                     warnings.warn(
                         f"Creating SparseArray from {data.dtype} data "
-                        "loses timezone information.  Cast to object before "
+                        "loses timezone information. Cast to object before "
                         "sparse to retain timezone information.",
                         UserWarning,
                         stacklevel=2,
diff --git a/pandas/core/computation/align.py b/pandas/core/computation/align.py
index 8217dbfbda655..148b37cafbf78 100644
--- a/pandas/core/computation/align.py
+++ b/pandas/core/computation/align.py
@@ -124,7 +124,7 @@ def _align_core(terms):
                     w = (
                         f"Alignment difference on axis {axis} is larger "
                         f"than an order of magnitude on term {repr(terms[i].name)}, "
-                        f"by more than {ordm:.4g}; performance may suffer"
+                        f"by more than {ordm:.4g}; performance may suffer."
                     )
                     warnings.warn(w, category=PerformanceWarning, stacklevel=6)
 
diff --git a/pandas/core/computation/expressions.py b/pandas/core/computation/expressions.py
index a62137bd63692..7b5f5cafb26f4 100644
--- a/pandas/core/computation/expressions.py
+++ b/pandas/core/computation/expressions.py
@@ -214,7 +214,7 @@ def _bool_arith_fallback(op_str, a, b):
             warnings.warn(
                 f"evaluating in Python space because the {repr(op_str)} "
                 "operator is not supported by numexpr for the bool dtype, "
-                f"use {repr(_BOOL_OP_UNSUPPORTED[op_str])} instead"
+                f"use {repr(_BOOL_OP_UNSUPPORTED[op_str])} instead."
             )
             return True
     return False
diff --git a/pandas/core/construction.py b/pandas/core/construction.py
index 7215cd17409cb..90349ee5f942f 100644
--- a/pandas/core/construction.py
+++ b/pandas/core/construction.py
@@ -767,7 +767,7 @@ def _try_cast(
                 f"Could not cast to {dtype}, falling back to object. This "
                 "behavior is deprecated. In a future version, when a dtype is "
                 "passed to 'DataFrame', either all columns will be cast to that "
-                "dtype, or a TypeError will be raised",
+                "dtype, or a TypeError will be raised.",
                 FutureWarning,
                 stacklevel=7,
             )
diff --git a/pandas/core/dtypes/cast.py b/pandas/core/dtypes/cast.py
index 4f4276ceddcf9..6f10a490c7147 100644
--- a/pandas/core/dtypes/cast.py
+++ b/pandas/core/dtypes/cast.py
@@ -2085,7 +2085,7 @@ def maybe_cast_to_integer_array(
         warnings.warn(
             f"Constructing Series or DataFrame from {arr.dtype} values and "
             f"dtype={dtype} is deprecated and will raise in a future version. "
-            "Use values.view(dtype) instead",
+            "Use values.view(dtype) instead.",
             FutureWarning,
             stacklevel=find_stack_level(),
         )
diff --git a/pandas/core/dtypes/common.py b/pandas/core/dtypes/common.py
index 069d7d8c76efb..393fe08f7277c 100644
--- a/pandas/core/dtypes/common.py
+++ b/pandas/core/dtypes/common.py
@@ -302,8 +302,8 @@ def is_categorical(arr) -> bool:
     True
     """
     warnings.warn(
-        "is_categorical is deprecated and will be removed in a future version.  "
-        "Use is_categorical_dtype instead",
+        "is_categorical is deprecated and will be removed in a future version. "
+        "Use is_categorical_dtype instead.",
         FutureWarning,
         stacklevel=2,
     )
diff --git a/pandas/core/frame.py b/pandas/core/frame.py
index 304e350a377bb..e02a88aafcf34 100644
--- a/pandas/core/frame.py
+++ b/pandas/core/frame.py
@@ -4542,9 +4542,9 @@ def lookup(
             The found values.
         """
         msg = (
-            "The 'lookup' method is deprecated and will be"
-            "removed in a future version."
-            "You can use DataFrame.melt and DataFrame.loc"
+            "The 'lookup' method is deprecated and will be "
+            "removed in a future version. "
+            "You can use DataFrame.melt and DataFrame.loc "
             "as a substitute."
         )
         warnings.warn(msg, FutureWarning, stacklevel=2)
diff --git a/pandas/core/generic.py b/pandas/core/generic.py
index 36c0d024369e6..bace333c9ccb5 100644
--- a/pandas/core/generic.py
+++ b/pandas/core/generic.py
@@ -8970,7 +8970,7 @@ def where(
         if try_cast is not lib.no_default:
             warnings.warn(
                 "try_cast keyword is deprecated and will be removed in a "
-                "future version",
+                "future version.",
                 FutureWarning,
                 stacklevel=4,
             )
@@ -9003,7 +9003,7 @@ def mask(
         if try_cast is not lib.no_default:
             warnings.warn(
                 "try_cast keyword is deprecated and will be removed in a "
-                "future version",
+                "future version.",
                 FutureWarning,
                 stacklevel=4,
             )
@@ -9196,7 +9196,7 @@ def slice_shift(self: FrameOrSeries, periods: int = 1, axis=0) -> FrameOrSeries:
         msg = (
             "The 'slice_shift' method is deprecated "
             "and will be removed in a future version. "
-            "You can use DataFrame/Series.shift instead"
+            "You can use DataFrame/Series.shift instead."
         )
         warnings.warn(msg, FutureWarning, stacklevel=2)
 
@@ -10838,7 +10838,7 @@ def expanding(
         axis = self._get_axis_number(axis)
         if center is not None:
             warnings.warn(
-                "The `center` argument on `expanding` will be removed in the future",
+                "The `center` argument on `expanding` will be removed in the future.",
                 FutureWarning,
                 stacklevel=2,
             )
diff --git a/pandas/core/index.py b/pandas/core/index.py
index 44f434e038a4b..13a687b1c27e3 100644
--- a/pandas/core/index.py
+++ b/pandas/core/index.py
@@ -23,7 +23,7 @@
 
 # GH#30193
 warnings.warn(
-    "pandas.core.index is deprecated and will be removed in a future version.  "
+    "pandas.core.index is deprecated and will be removed in a future version. "
     "The public classes are available in the top-level namespace.",
     FutureWarning,
     stacklevel=2,
diff --git a/pandas/core/indexes/accessors.py b/pandas/core/indexes/accessors.py
index 017f58bff03e9..516c63e0e3727 100644
--- a/pandas/core/indexes/accessors.py
+++ b/pandas/core/indexes/accessors.py
@@ -283,7 +283,7 @@ def weekofyear(self):
         Please use Series.dt.isocalendar().week instead.
         """
         warnings.warn(
-            "Series.dt.weekofyear and Series.dt.week have been deprecated.  "
+            "Series.dt.weekofyear and Series.dt.week have been deprecated. "
             "Please use Series.dt.isocalendar().week instead.",
             FutureWarning,
             stacklevel=2,
diff --git a/pandas/core/indexes/base.py b/pandas/core/indexes/base.py
index 8c32ccc1fa74c..2615bfffb3cd9 100644
--- a/pandas/core/indexes/base.py
+++ b/pandas/core/indexes/base.py
@@ -387,7 +387,7 @@ def __new__(
             warnings.warn(
                 "Passing keywords other than 'data', 'dtype', 'copy', 'name', "
                 "'tupleize_cols' is deprecated and will raise TypeError in a "
-                "future version.  Use the specific Index subclass directly instead",
+                "future version.  Use the specific Index subclass directly instead.",
                 FutureWarning,
                 stacklevel=2,
             )
@@ -620,7 +620,7 @@ def asi8(self):
             An ndarray with int64 dtype.
         """
         warnings.warn(
-            "Index.asi8 is deprecated and will be removed in a future version",
+            "Index.asi8 is deprecated and will be removed in a future version.",
             FutureWarning,
             stacklevel=2,
         )
@@ -2469,8 +2469,8 @@ def is_all_dates(self) -> bool:
         Whether or not the index values only consist of dates.
         """
         warnings.warn(
-            "Index.is_all_dates is deprecated, will be removed in a future version.  "
-            "check index.inferred_type instead",
+            "Index.is_all_dates is deprecated, will be removed in a future version. "
+            "check index.inferred_type instead.",
             FutureWarning,
             stacklevel=2,
         )
@@ -2835,7 +2835,7 @@ def __and__(self, other):
         warnings.warn(
             "Index.__and__ operating as a set operation is deprecated, "
             "in the future this will be a logical operation matching "
-            "Series.__and__.  Use index.intersection(other) instead",
+            "Series.__and__.  Use index.intersection(other) instead.",
             FutureWarning,
             stacklevel=2,
         )
@@ -2846,7 +2846,7 @@ def __or__(self, other):
         warnings.warn(
             "Index.__or__ operating as a set operation is deprecated, "
             "in the future this will be a logical operation matching "
-            "Series.__or__.  Use index.union(other) instead",
+            "Series.__or__.  Use index.union(other) instead.",
             FutureWarning,
             stacklevel=2,
         )
@@ -2857,7 +2857,7 @@ def __xor__(self, other):
         warnings.warn(
             "Index.__xor__ operating as a set operation is deprecated, "
             "in the future this will be a logical operation matching "
-            "Series.__xor__.  Use index.symmetric_difference(other) instead",
+            "Series.__xor__.  Use index.symmetric_difference(other) instead.",
             FutureWarning,
             stacklevel=2,
         )
@@ -3455,7 +3455,7 @@ def get_loc(self, key, method=None, tolerance=None):
         warnings.warn(
             f"Passing method to {type(self).__name__}.get_loc is deprecated "
             "and will raise in a future version. Use "
-            "index.get_indexer([item], method=...) instead",
+            "index.get_indexer([item], method=...) instead.",
             FutureWarning,
             stacklevel=2,
         )
@@ -3964,7 +3964,7 @@ def reindex(
                     # GH#42568
                     warnings.warn(
                         "reindexing with a non-unique Index is deprecated and "
-                        "will raise in a future version",
+                        "will raise in a future version.",
                         FutureWarning,
                         stacklevel=2,
                     )
@@ -4695,7 +4695,7 @@ def is_type_compatible(self, kind: str_t) -> bool:
         """
         warnings.warn(
             "Index.is_type_compatible is deprecated and will be removed in a "
-            "future version",
+            "future version.",
             FutureWarning,
             stacklevel=2,
         )
@@ -5311,7 +5311,7 @@ def get_value(self, series: Series, key):
         """
         warnings.warn(
             "get_value is deprecated and will be removed in a future version. "
-            "Use Series[key] instead",
+            "Use Series[key] instead.",
             FutureWarning,
             stacklevel=2,
         )
@@ -6861,7 +6861,7 @@ def _maybe_try_sort(result, sort):
             result = algos.safe_sort(result)
         except TypeError as err:
             warnings.warn(
-                f"{err}, sort order is undefined for incomparable objects",
+                f"{err}, sort order is undefined for incomparable objects.",
                 RuntimeWarning,
                 stacklevel=4,
             )
diff --git a/pandas/core/indexes/category.py b/pandas/core/indexes/category.py
index 1a6a5f08841b9..c45543a9187bd 100644
--- a/pandas/core/indexes/category.py
+++ b/pandas/core/indexes/category.py
@@ -216,7 +216,7 @@ def __new__(
             warnings.warn(
                 "Constructing a CategoricalIndex without passing data is "
                 "deprecated and will raise in a future version. "
-                "Use CategoricalIndex([], ...) instead",
+                "Use CategoricalIndex([], ...) instead.",
                 FutureWarning,
                 stacklevel=2,
             )
@@ -430,7 +430,7 @@ def reindex(
                 # GH#42568
                 warnings.warn(
                     "reindexing with a non-unique Index is deprecated and will "
-                    "raise in a future version",
+                    "raise in a future version.",
                     FutureWarning,
                     stacklevel=2,
                 )
@@ -504,7 +504,8 @@ def _is_comparable_dtype(self, dtype: DtypeObj) -> bool:
     def take_nd(self, *args, **kwargs):
         """Alias for `take`"""
         warnings.warn(
-            "CategoricalIndex.take_nd is deprecated, use CategoricalIndex.take instead",
+            "CategoricalIndex.take_nd is deprecated, use CategoricalIndex.take "
+            "instead.",
             FutureWarning,
             stacklevel=2,
         )
diff --git a/pandas/core/indexes/datetimelike.py b/pandas/core/indexes/datetimelike.py
index 080889444f809..5d778af954eef 100644
--- a/pandas/core/indexes/datetimelike.py
+++ b/pandas/core/indexes/datetimelike.py
@@ -556,7 +556,7 @@ def _has_complex_internals(self) -> bool:
     def is_type_compatible(self, kind: str) -> bool:
         warnings.warn(
             f"{type(self).__name__}.is_type_compatible is deprecated and will be "
-            "removed in a future version",
+            "removed in a future version.",
             FutureWarning,
             stacklevel=2,
         )
diff --git a/pandas/core/indexes/datetimes.py b/pandas/core/indexes/datetimes.py
index ed1a8b436792e..8a5811da4dd5a 100644
--- a/pandas/core/indexes/datetimes.py
+++ b/pandas/core/indexes/datetimes.py
@@ -496,7 +496,7 @@ def to_series(self, keep_tz=lib.no_default, index=None, name=None):
             if keep_tz:
                 warnings.warn(
                     "The 'keep_tz' keyword in DatetimeIndex.to_series "
-                    "is deprecated and will be removed in a future version.  "
+                    "is deprecated and will be removed in a future version. "
                     "You can stop passing 'keep_tz' to silence this warning.",
                     FutureWarning,
                     stacklevel=2,
@@ -611,7 +611,7 @@ def _deprecate_mismatched_indexing(self, key) -> None:
                 msg = (
                     "Indexing a timezone-aware DatetimeIndex with a "
                     "timezone-naive datetime is deprecated and will "
-                    "raise KeyError in a future version.  "
+                    "raise KeyError in a future version. "
                     "Use a timezone-aware object instead."
                 )
             warnings.warn(msg, FutureWarning, stacklevel=find_stack_level())
diff --git a/pandas/core/indexes/numeric.py b/pandas/core/indexes/numeric.py
index 08881f915ef2d..2d8948a64dde7 100644
--- a/pandas/core/indexes/numeric.py
+++ b/pandas/core/indexes/numeric.py
@@ -371,7 +371,7 @@ class IntegerIndex(NumericIndex):
     def asi8(self) -> np.ndarray:
         # do not cache or you'll create a memory leak
         warnings.warn(
-            "Index.asi8 is deprecated and will be removed in a future version",
+            "Index.asi8 is deprecated and will be removed in a future version.",
             FutureWarning,
             stacklevel=2,
         )
diff --git a/pandas/core/indexes/period.py b/pandas/core/indexes/period.py
index 4e47a59740212..1d265402b040f 100644
--- a/pandas/core/indexes/period.py
+++ b/pandas/core/indexes/period.py
@@ -335,7 +335,7 @@ def astype(self, dtype, copy: bool = True, how=lib.no_default):
             warnings.warn(
                 "The 'how' keyword in PeriodIndex.astype is deprecated and "
                 "will be removed in a future version. "
-                "Use index.to_timestamp(how=how) instead",
+                "Use index.to_timestamp(how=how) instead.",
                 FutureWarning,
                 stacklevel=2,
             )
diff --git a/pandas/core/indexing.py b/pandas/core/indexing.py
index ad5f878628931..26a2996af6b2a 100644
--- a/pandas/core/indexing.py
+++ b/pandas/core/indexing.py
@@ -1345,7 +1345,7 @@ def _has_valid_setitem_indexer(self, indexer) -> bool:
 
         if isinstance(indexer, ABCDataFrame):
             warnings.warn(
-                "DataFrame indexer for .iloc is deprecated and will be removed in"
+                "DataFrame indexer for .iloc is deprecated and will be removed in "
                 "a future version.\n"
                 "consider using .loc with a DataFrame indexer for automatic alignment.",
                 FutureWarning,
diff --git a/pandas/core/internals/blocks.py b/pandas/core/internals/blocks.py
index 953ccedaa5222..e2680712483a4 100644
--- a/pandas/core/internals/blocks.py
+++ b/pandas/core/internals/blocks.py
@@ -190,7 +190,7 @@ def is_categorical(self) -> bool:
         warnings.warn(
             "Block.is_categorical is deprecated and will be removed in a "
             "future version.  Use isinstance(block.values, Categorical) "
-            "instead.  See https://github.com/pandas-dev/pandas/issues/40226",
+            "instead. See https://github.com/pandas-dev/pandas/issues/40226",
             DeprecationWarning,
             stacklevel=2,
         )
diff --git a/pandas/core/internals/managers.py b/pandas/core/internals/managers.py
index d0dad26cfb275..615e0a0665d00 100644
--- a/pandas/core/internals/managers.py
+++ b/pandas/core/internals/managers.py
@@ -1160,7 +1160,7 @@ def insert(self, loc: int, item: Hashable, value: ArrayLike) -> None:
                 "DataFrame is highly fragmented.  This is usually the result "
                 "of calling `frame.insert` many times, which has poor performance.  "
                 "Consider joining all columns at once using pd.concat(axis=1) "
-                "instead.  To get a de-fragmented frame, use `newframe = frame.copy()`",
+                "instead. To get a de-fragmented frame, use `newframe = frame.copy()`",
                 PerformanceWarning,
                 stacklevel=5,
             )
diff --git a/pandas/core/ops/__init__.py b/pandas/core/ops/__init__.py
index 297769149e5f0..ece5b21fa2f8e 100644
--- a/pandas/core/ops/__init__.py
+++ b/pandas/core/ops/__init__.py
@@ -296,7 +296,7 @@ def to_series(right):
             if not left.axes[axis].equals(right.index):
                 warnings.warn(
                     "Automatic reindexing on DataFrame vs Series comparisons "
-                    "is deprecated and will raise ValueError in a future version.  "
+                    "is deprecated and will raise ValueError in a future version. "
                     "Do `left, right = left.align(right, axis=1, copy=False)` "
                     "before e.g. `left == right`",
                     FutureWarning,
diff --git a/pandas/core/reshape/merge.py b/pandas/core/reshape/merge.py
index a3baf8ade9c2e..501ad383168a0 100644
--- a/pandas/core/reshape/merge.py
+++ b/pandas/core/reshape/merge.py
@@ -673,7 +673,7 @@ def __init__(
         if _left.columns.nlevels != _right.columns.nlevels:
             msg = (
                 "merging between different levels is deprecated and will be removed "
-                f"in a future version. ({left.columns.nlevels} levels on the left,"
+                f"in a future version. ({left.columns.nlevels} levels on the left, "
                 f"{right.columns.nlevels} on the right)"
             )
             # stacklevel chosen to be correct when this is reached via pd.merge
@@ -1201,7 +1201,7 @@ def _maybe_coerce_merge_keys(self) -> None:
                         warnings.warn(
                             "You are merging on int and float "
                             "columns where the float values "
-                            "are not equal to their int representation",
+                            "are not equal to their int representation.",
                             UserWarning,
                         )
                     continue
@@ -1211,7 +1211,7 @@ def _maybe_coerce_merge_keys(self) -> None:
                         warnings.warn(
                             "You are merging on int and float "
                             "columns where the float values "
-                            "are not equal to their int representation",
+                            "are not equal to their int representation.",
                             UserWarning,
                         )
                     continue
diff --git a/pandas/core/series.py b/pandas/core/series.py
index e5e19373fcea1..a5ec4125f54a4 100644
--- a/pandas/core/series.py
+++ b/pandas/core/series.py
@@ -5088,7 +5088,7 @@ def between(self, left, right, inclusive="both") -> Series:
         """
         if inclusive is True or inclusive is False:
             warnings.warn(
-                "Boolean inputs to the `inclusive` argument are deprecated in"
+                "Boolean inputs to the `inclusive` argument are deprecated in "
                 "favour of `both` or `neither`.",
                 FutureWarning,
                 stacklevel=2,
diff --git a/pandas/core/tools/datetimes.py b/pandas/core/tools/datetimes.py
index 8eac5f76fd455..8af0ac05157c8 100644
--- a/pandas/core/tools/datetimes.py
+++ b/pandas/core/tools/datetimes.py
@@ -1096,7 +1096,7 @@ def calc_with_mask(carg, mask):
 def to_time(arg, format=None, infer_time_format=False, errors="raise"):
     # GH#34145
     warnings.warn(
-        "`to_time` has been moved, should be imported from pandas.core.tools.times.  "
+        "`to_time` has been moved, should be imported from pandas.core.tools.times. "
         "This alias will be removed in a future version.",
         FutureWarning,
         stacklevel=2,
diff --git a/pandas/io/clipboard/__init__.py b/pandas/io/clipboard/__init__.py
index c1c9865e6721d..947deb39ae064 100644
--- a/pandas/io/clipboard/__init__.py
+++ b/pandas/io/clipboard/__init__.py
@@ -271,7 +271,7 @@ def copy_dev_clipboard(text):
         text = _stringifyText(text)  # Converts non-str values to str.
         if text == "":
             warnings.warn(
-                "Pyperclip cannot copy a blank string to the clipboard on Cygwin."
+                "Pyperclip cannot copy a blank string to the clipboard on Cygwin. "
                 "This is effectively a no-op."
             )
         if "\r" in text:
@@ -518,7 +518,7 @@ def determine_clipboard():
         # see https://github.com/asweigart/pyperclip/issues/55
         if os.path.exists("/dev/clipboard"):
             warnings.warn(
-                "Pyperclip's support for Cygwin is not perfect,"
+                "Pyperclip's support for Cygwin is not perfect, "
                 "see https://github.com/asweigart/pyperclip/issues/55"
             )
             return init_dev_clipboard_clipboard()
diff --git a/pandas/io/clipboards.py b/pandas/io/clipboards.py
index a6940c08198b0..5990acd7191db 100644
--- a/pandas/io/clipboards.py
+++ b/pandas/io/clipboards.py
@@ -77,7 +77,7 @@ def read_clipboard(sep=r"\s+", **kwargs):  # pragma: no cover
         kwargs["engine"] = "python"
     elif len(sep) > 1 and kwargs.get("engine") == "c":
         warnings.warn(
-            "read_clipboard with regex separator does not work properly with c engine"
+            "read_clipboard with regex separator does not work properly with c engine."
         )
 
     return read_csv(StringIO(text), sep=sep, **kwargs)
@@ -134,7 +134,7 @@ def to_clipboard(obj, excel=True, sep=None, **kwargs):  # pragma: no cover
                 "to_clipboard in excel mode requires a single character separator."
             )
     elif sep is not None:
-        warnings.warn("to_clipboard with excel=False ignores the sep argument")
+        warnings.warn("to_clipboard with excel=False ignores the sep argument.")
 
     if isinstance(obj, ABCDataFrame):
         # str(df) has various unhelpful defaults, like truncation
diff --git a/pandas/io/excel/_base.py b/pandas/io/excel/_base.py
index 4d6a766ad6cfa..52d1e1c83d3e6 100644
--- a/pandas/io/excel/_base.py
+++ b/pandas/io/excel/_base.py
@@ -504,7 +504,7 @@ def parse(
         else:
             stacklevel = find_stack_level()
             warnings.warn(
-                "convert_float is deprecated and will be removed in a future version",
+                "convert_float is deprecated and will be removed in a future version.",
                 FutureWarning,
                 stacklevel=stacklevel,
             )
diff --git a/pandas/io/json/_table_schema.py b/pandas/io/json/_table_schema.py
index 60b2489005f48..e7a24fcee2b34 100644
--- a/pandas/io/json/_table_schema.py
+++ b/pandas/io/json/_table_schema.py
@@ -94,9 +94,11 @@ def set_default_names(data):
     if com.all_not_none(*data.index.names):
         nms = data.index.names
         if len(nms) == 1 and data.index.name == "index":
-            warnings.warn("Index name of 'index' is not round-trippable")
+            warnings.warn("Index name of 'index' is not round-trippable.")
         elif len(nms) > 1 and any(x.startswith("level_") for x in nms):
-            warnings.warn("Index names beginning with 'level_' are not round-trippable")
+            warnings.warn(
+                "Index names beginning with 'level_' are not round-trippable."
+            )
         return data
 
     data = data.copy()
diff --git a/pandas/io/parsers/base_parser.py b/pandas/io/parsers/base_parser.py
index 5714bbab016c8..6737f2dfd5086 100644
--- a/pandas/io/parsers/base_parser.py
+++ b/pandas/io/parsers/base_parser.py
@@ -549,7 +549,7 @@ def _convert_to_ndarrays(
                     warnings.warn(
                         (
                             "Both a converter and dtype were specified "
-                            f"for column {c} - only the converter will be used"
+                            f"for column {c} - only the converter will be used."
                         ),
                         ParserWarning,
                         stacklevel=7,
diff --git a/pandas/io/parsers/c_parser_wrapper.py b/pandas/io/parsers/c_parser_wrapper.py
index ae62cc3b45578..57ae61548d8d0 100644
--- a/pandas/io/parsers/c_parser_wrapper.py
+++ b/pandas/io/parsers/c_parser_wrapper.py
@@ -390,7 +390,7 @@ def _concatenate_chunks(chunks: list[dict[int, ArrayLike]]) -> dict:
         warning_names = ",".join(warning_columns)
         warning_message = " ".join(
             [
-                f"Columns ({warning_names}) have mixed types."
+                f"Columns ({warning_names}) have mixed types. "
                 f"Specify dtype option on import or set low_memory=False."
             ]
         )
diff --git a/pandas/io/sas/sas_xport.py b/pandas/io/sas/sas_xport.py
index 6ced3febd78f4..bdb7d86a9b37e 100644
--- a/pandas/io/sas/sas_xport.py
+++ b/pandas/io/sas/sas_xport.py
@@ -393,7 +393,7 @@ def _record_count(self) -> int:
         total_records_length = self.filepath_or_buffer.tell() - self.record_start
 
         if total_records_length % 80 != 0:
-            warnings.warn("xport file may be corrupted")
+            warnings.warn("xport file may be corrupted.")
 
         if self.record_length > 80:
             self.filepath_or_buffer.seek(self.record_start)
diff --git a/pandas/plotting/_matplotlib/tools.py b/pandas/plotting/_matplotlib/tools.py
index 6d27cc8686b65..9679e79d8c4ba 100644
--- a/pandas/plotting/_matplotlib/tools.py
+++ b/pandas/plotting/_matplotlib/tools.py
@@ -225,12 +225,13 @@ def create_subplots(
                 ax = flatten_axes(ax)
             if layout is not None:
                 warnings.warn(
-                    "When passing multiple axes, layout keyword is ignored", UserWarning
+                    "When passing multiple axes, layout keyword is ignored.",
+                    UserWarning,
                 )
             if sharex or sharey:
                 warnings.warn(
                     "When passing multiple axes, sharex and sharey "
-                    "are ignored. These settings must be specified when creating axes",
+                    "are ignored. These settings must be specified when creating axes.",
                     UserWarning,
                     stacklevel=4,
                 )
@@ -253,7 +254,7 @@ def create_subplots(
         else:
             warnings.warn(
                 "To output multiple subplots, the figure containing "
-                "the passed axes is being cleared",
+                "the passed axes is being cleared.",
                 UserWarning,
                 stacklevel=4,
             )
diff --git a/pandas/tests/computation/test_eval.py b/pandas/tests/computation/test_eval.py
index 99c3cac9ba976..dfdb9dabf6bed 100644
--- a/pandas/tests/computation/test_eval.py
+++ b/pandas/tests/computation/test_eval.py
@@ -1110,7 +1110,7 @@ def test_performance_warning_for_poor_alignment(self, engine, parser):
                 expected = (
                     f"Alignment difference on axis 1 is larger "
                     f"than an order of magnitude on term 'df', "
-                    f"by more than {logged:.4g}; performance may suffer"
+                    f"by more than {logged:.4g}; performance may suffer."
                 )
                 assert msg == expected
 
diff --git a/pandas/tests/util/test_deprecate_nonkeyword_arguments.py b/pandas/tests/util/test_deprecate_nonkeyword_arguments.py
index a20264ac6fbb0..c03639811d9d5 100644
--- a/pandas/tests/util/test_deprecate_nonkeyword_arguments.py
+++ b/pandas/tests/util/test_deprecate_nonkeyword_arguments.py
@@ -69,7 +69,7 @@ def test_three_positional_argument_with_warning_message_analysis():
             assert actual_warning.category == FutureWarning
             assert str(actual_warning.message) == (
                 "Starting with pandas version 1.1 all arguments of g "
-                "except for the argument 'a' will be keyword-only"
+                "except for the argument 'a' will be keyword-only."
             )
 
 
@@ -97,7 +97,7 @@ def test_one_positional_argument_with_warning_message_analysis():
             assert actual_warning.category == FutureWarning
             assert str(actual_warning.message) == (
                 "Starting with pandas version 1.1 all arguments "
-                "of h will be keyword-only"
+                "of h will be keyword-only."
             )
 
 
diff --git a/pandas/tseries/frequencies.py b/pandas/tseries/frequencies.py
index c55ac6ce228bf..b4d847901613a 100644
--- a/pandas/tseries/frequencies.py
+++ b/pandas/tseries/frequencies.py
@@ -113,7 +113,7 @@ def get_offset(name: str) -> DateOffset:
     """
     warnings.warn(
         "get_offset is deprecated and will be removed in a future version, "
-        "use to_offset instead",
+        "use to_offset instead.",
         FutureWarning,
         stacklevel=2,
     )
diff --git a/pandas/util/_decorators.py b/pandas/util/_decorators.py
index c540c0e1c6721..d98b0d24d22b9 100644
--- a/pandas/util/_decorators.py
+++ b/pandas/util/_decorators.py
@@ -51,7 +51,7 @@ def deprecate(
     """
     alt_name = alt_name or alternative.__name__
     klass = klass or FutureWarning
-    warning_msg = msg or f"{name} is deprecated, use {alt_name} instead"
+    warning_msg = msg or f"{name} is deprecated, use {alt_name} instead."
 
     @wraps(alternative)
     def wrapper(*args, **kwargs) -> Callable[..., Any]:
@@ -186,20 +186,20 @@ def wrapper(*args, **kwargs) -> Callable[..., Any]:
                     msg = (
                         f"the {old_arg_name}={repr(old_arg_value)} keyword is "
                         "deprecated, use "
-                        f"{new_arg_name}={repr(new_arg_value)} instead"
+                        f"{new_arg_name}={repr(new_arg_value)} instead."
                     )
                 else:
                     new_arg_value = old_arg_value
                     msg = (
                         f"the {repr(old_arg_name)}' keyword is deprecated, "
-                        f"use {repr(new_arg_name)} instead"
+                        f"use {repr(new_arg_name)} instead."
                     )
 
                 warnings.warn(msg, FutureWarning, stacklevel=stacklevel)
                 if kwargs.get(new_arg_name) is not None:
                     msg = (
                         f"Can only specify {repr(old_arg_name)} "
-                        f"or {repr(new_arg_name)}, not both"
+                        f"or {repr(new_arg_name)}, not both."
                     )
                     raise TypeError(msg)
                 else:
@@ -296,7 +296,7 @@ def decorate(func):
         num_allow_args = len(allow_args)
         msg = (
             f"{future_version_msg(version)} all arguments of "
-            f"{func.__qualname__}{{arguments}} will be keyword-only"
+            f"{func.__qualname__}{{arguments}} will be keyword-only."
         )
 
         @wraps(func)
diff --git a/pandas/util/version/__init__.py b/pandas/util/version/__init__.py
index cd6a38f9e7ff1..a6eccf2941342 100644
--- a/pandas/util/version/__init__.py
+++ b/pandas/util/version/__init__.py
@@ -185,7 +185,7 @@ def __init__(self, version: str) -> None:
 
         warnings.warn(
             "Creating a LegacyVersion has been deprecated and will be "
-            "removed in the next major release",
+            "removed in the next major release.",
             DeprecationWarning,
         )