Weather in July 2025

Illinois weather in July 2025

°C °F

The average weather in Illinois in July

The weather in Illinois in July is hot. The average temperatures are between 20°C and 27°C.

You can expect about 3 to 8 days of rain in Illinois during the month of July. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.

Our weather forecast can give you a great sense of what weather to expect in Illinois in July 2025.

If you’re planning to visit Illinois in the near future, we highly recommend that you review the 14 day weather forecast for Illinois before you arrive.

Temperatures
27° / 20°
Rainy Days
7
Snowy Days
0
Dry Days
24
Rainfall
114
mm
Sun Hours
11.0
Hrs

Explore the weather in Illinois in other months

Illinois annual weather

Month Temperatures Rainy Days Dry Days Snowy Days Rainfall Weather More details
January -2° / -7° 5 11 15 39 mm
Awful
February 0° / -6° 4 11 14 41 mm
Awful
March 7° / 1° 6 19 6 55 mm
Bad
April 12° / 5° 7 21 3 79 mm
Awful
May 19° / 12° 7 24 0 98 mm
Ok
June 24° / 17° 7 23 0 128 mm
Good
July 27° / 20° 7 24 0 114 mm
Good
August 27° / 19° 5 26 0 100 mm
Perfect
September 24° / 16° 4 26 0 64 mm
Perfect
October 16° / 10° 5 25 0 65 mm
Good
November 9° / 3° 4 22 4 40 mm
Bad
December 3° / -2° 5 16 10 38 mm
Awful

Weather in Illinois in July - FAQ

What is the average temperature in Illinois in July?
The average temperature in Illinois in July is 20/27° C.
What is the chance of rain in Illinois in July?
On average, there are 7 rainy days in Illinois during July.
Weather wise, is July a good time to visit Illinois?
The weather in Illinois in July is good.
Can it snow in Illinois in July?
On average, there are 0 snowy days in Illinois in July.
Cities in Illinois

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More about the weather in Illinois