What is the hottest month in Alpha, IL?

July is the warmest month, with a normal high of 83°F at Altona.

What is the coldest month in Alpha, IL?

January is the coldest month, with a normal low of 13°F.

What is the wettest month in Alpha, IL?

May has the most precipitation on average, about 5.21 inches.

Checked Oct 25, 2026

Alpha, IL Climate

1991 to 2020 normals at Altona, 12 mi from the center of Alpha, elevation 765 ft.

Average weather by month

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

Month	High	Low	Precip.	Snow
January	30°	13°	1.82 in	--
February	35°	16°	2.07 in	--
March	48°	27°	2.58 in	--
April	62°	37°	4.00 in	--
May	72°	49°	5.21 in	--
June	81°	59°	4.72 in	--
July	83°	62°	3.98 in	--
August	82°	59°	3.76 in	--
September	76°	52°	3.81 in	--
October	64°	40°	2.77 in	--
November	49°	28°	2.56 in	--
December	35°	19°	2.10 in	--
Year	60°		39.38 in	--

Frequently asked questions

What is the hottest month in Alpha, IL?: July is the warmest month, with a normal high of 83°F at Altona.
What is the coldest month in Alpha, IL?: January is the coldest month, with a normal low of 13°F.
What is the wettest month in Alpha, IL?: May has the most precipitation on average, about 5.21 inches.

Today

Alpha, IL forecast

Data sources

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

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About this data

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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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