What is the hottest month in Windsor, CA?

August is the warmest month, with a normal high of 84°F at Santa Rosa Sonoma CO AP.

What is the coldest month in Windsor, CA?

December is the coldest month, with a normal low of 37°F.

What is the wettest month in Windsor, CA?

December has the most precipitation on average, about 6.76 inches.

Checked Oct 25, 2026

Windsor, CA Climate

1991 to 2020 normals at Santa Rosa Sonoma CO AP, 2.6 mi from the center of Windsor, elevation 114 ft.

Average weather by month

Select a month for daily normals and last year's weather

Month	High	Low	Precip.	Snow
January	58°	38°	6.67 in	--
February	62°	39°	6.67 in	--
March	65°	41°	4.58 in	--
April	69°	43°	2.10 in	--
May	75°	47°	1.27 in	--
June	82°	50°	0.31 in	--
July	84°	52°	0.01 in	--
August	84°	52°	0.05 in	--
September	83°	50°	0.13 in	--
October	77°	46°	1.65 in	--
November	65°	40°	3.58 in	--
December	58°	37°	6.76 in	--
Year	72°		33.78 in	--

Frequently asked questions

What is the hottest month in Windsor, CA?: August is the warmest month, with a normal high of 84°F at Santa Rosa Sonoma CO AP.
What is the coldest month in Windsor, CA?: December is the coldest month, with a normal low of 37°F.
What is the wettest month in Windsor, CA?: December has the most precipitation on average, about 6.76 inches.

Today

Windsor, CA forecast

Data sources

U.S. Climate Normals 1991-2020NOAA National Centers for Environmental Information · Official site
U.S. Climate Normals 1991-2020 (daily) and GHCN-Daily via Access Data ServiceNOAA National Centers for Environmental Information · Official site

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About this data

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