What is the hottest month in Willowbrook, CA?

August is the warmest month, with a normal high of 79°F at Hawthorne MUNI AP.

What is the coldest month in Willowbrook, CA?

December is the coldest month, with a normal low of 49°F.

What is the wettest month in Willowbrook, CA?

February has the most precipitation on average, about 2.96 inches.

Checked Oct 25, 2026

Willowbrook, CA Climate

1991 to 2020 normals at Hawthorne MUNI AP, 5.9 mi from the center of Willowbrook, elevation 63 ft.

Average weather by month

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

Month	High	Low	Precip.	Snow
January	67°	49°	2.67 in	--
February	67°	51°	2.96 in	--
March	68°	53°	1.67 in	--
April	70°	55°	0.60 in	--
May	71°	58°	0.29 in	--
June	73°	62°	0.00 in	--
July	77°	65°	0.02 in	--
August	79°	65°	0.00 in	--
September	79°	65°	0.17 in	--
October	76°	60°	0.48 in	--
November	72°	54°	0.72 in	--
December	66°	49°	2.19 in	--
Year	72°		11.77 in	--

Frequently asked questions

What is the hottest month in Willowbrook, CA?: August is the warmest month, with a normal high of 79°F at Hawthorne MUNI AP.
What is the coldest month in Willowbrook, CA?: December is the coldest month, with a normal low of 49°F.
What is the wettest month in Willowbrook, CA?: February has the most precipitation on average, about 2.96 inches.

Today

Willowbrook, 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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