What is the hottest month in Brookfield, WI?

July is the warmest month, with a normal high of 81°F at Brookfield Wwtp.

What is the coldest month in Brookfield, WI?

January is the coldest month, with a normal low of 12°F.

What is the wettest month in Brookfield, WI?

June has the most precipitation on average, about 4.80 inches.

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Checked Oct 25, 2026

Brookfield, WI Climate

1991 to 2020 normals at Brookfield Wwtp, 2.7 mi from the center of Brookfield, elevation 830 ft.

Average weather by month

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

Month	High	Low	Precip.	Snow
January	28°	12°	1.59 in	--
February	32°	15°	1.56 in	--
March	42°	25°	2.06 in	--
April	54°	35°	3.71 in	--
May	67°	47°	3.94 in	--
June	77°	56°	4.80 in	--
July	81°	61°	3.82 in	--
August	79°	60°	3.97 in	--
September	72°	51°	3.21 in	--
October	59°	40°	3.09 in	--
November	45°	29°	2.19 in	--
December	33°	19°	1.96 in	--
Year	56°		35.90 in	--

Frequently asked questions

What is the hottest month in Brookfield, WI?: July is the warmest month, with a normal high of 81°F at Brookfield Wwtp.
What is the coldest month in Brookfield, WI?: January is the coldest month, with a normal low of 12°F.
What is the wettest month in Brookfield, WI?: June has the most precipitation on average, about 4.80 inches.

Today

Brookfield, WI 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

Weather and emergencies: Weather, air quality and hazard information on this page is delayed and may be incomplete. It is not a substitute for official warnings. Always follow the National Weather Service, local emergency management and public safety officials. In an emergency, call 911. For evacuation orders, use your local official alert system.

Climate normals are 30-year averages measured at one weather station, which may be miles from the place named here or at a different elevation.

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