DOC: Update to reflect we only support Python >=3.10

README.md

@@ -31,7 +31,7 @@ on a future ``1.x`` version.
 For additional MetPy examples not included in this repository, please see the [Unidata Python
 Gallery](https://unidata.github.io/python-gallery/).
 
-We support Python >= 3.9.
+We support Python >= 3.10.
 
 Need Help?
 ----------

docs/index.rst

@@ -14,7 +14,7 @@ MetPy
 =====
 
 MetPy is a collection of tools in Python for reading, visualizing, and performing calculations
-with weather data. MetPy supports Python >= 3.9 and is freely available under a permissive
+with weather data. MetPy supports Python >= 3.10 and is freely available under a permissive
 `open source license <https://github.com/Unidata/MetPy/blob/main/LICENSE>`_.
 
 If you're new to MetPy, check out our :doc:`Getting Started <userguide/startingguide>` guide.

docs/userguide/installguide.rst

@@ -7,7 +7,7 @@ Requirements
 ------------
 In general, MetPy tries to support minor versions of dependencies released within the last two
 years. For Python itself, that generally means supporting the last two minor releases; MetPy
-currently supports Python >= 3.9.
+currently supports Python >= 3.10.
 
 .. literalinclude:: ../../pyproject.toml
    :start-at: matplotlib

pyproject.toml

@@ -14,7 +14,6 @@ classifiers = [
     "Development Status :: 5 - Production/Stable",
     "Framework :: Matplotlib",
     "Programming Language :: Python",
-    "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
@@ -24,7 +23,7 @@ classifiers = [
     "Operating System :: OS Independent",
     "License :: OSI Approved :: BSD License"
 ]
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 dependencies = [
     "matplotlib>=3.5.0",
     "numpy>=1.20.0",