What is the hottest month in Penfield, IL?

July is the warmest month, with a normal high of 88°F at Rantoul.

What is the coldest month in Penfield, IL?

January is the coldest month, with a normal low of 16°F.

What is the wettest month in Penfield, IL?

June has the most precipitation on average, about 4.61 inches.

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Checked Oct 25, 2026

Penfield, IL Climate

1991 to 2020 normals at Rantoul, 11 mi from the center of Penfield, elevation 740 ft.

Average weather by month

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

Month	High	Low	Precip.	Snow
January	34°	16°	2.54 in	--
February	40°	20°	2.01 in	--
March	51°	29°	2.58 in	--
April	64°	40°	3.98 in	--
May	75°	51°	4.33 in	--
June	85°	62°	4.61 in	--
July	88°	64°	4.44 in	--
August	86°	62°	3.86 in	--
September	81°	54°	3.28 in	--
October	67°	42°	3.32 in	--
November	52°	31°	3.19 in	--
December	40°	22°	2.21 in	--
Year	64°		40.35 in	--

Frequently asked questions

What is the hottest month in Penfield, IL?: July is the warmest month, with a normal high of 88°F at Rantoul.
What is the coldest month in Penfield, IL?: January is the coldest month, with a normal low of 16°F.
What is the wettest month in Penfield, IL?: June has the most precipitation on average, about 4.61 inches.

Today

Penfield, IL 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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