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Illinois
Long Range Weather Forecast
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Illinois long range weather forecast

Local time: 17:45 24 °C

For this time of the year, Illinois is experiencing slightly cooler temperatures, gently falling below the seasonal average.

According to the long-range forecast, temperatures are expected to be 24.4 °C which is -1.1 °C lower than the historical average.

See weather calendar ››

Select a month and click on a day for more information:
°C °F
Weather in June
<<
Wednesday
Jul 1
26° / 20°
Thursday
Jul 2
26° / 18°
Friday
Jul 3
27° / 18°
Saturday
Jul 4
28° / 21°
Sunday
Jul 5
29° / 22°
Monday
Jul 6
25° / 20°
Tuesday
Jul 7
26° / 20°
Wednesday
Jul 8
25° / 19°
Thursday
Jul 9
25° / 20°
Friday
Jul 10
26° / 20°
Saturday
Jul 11
27° / 19°
Sunday
Jul 12
25° / 20°
Monday
Jul 13
26° / 20°
Tuesday
Jul 14
28° / 20°
Wednesday
Jul 15
27° / 21°
Thursday
Jul 16
27° / 20°
Friday
Jul 17
25° / 20°
Saturday
Jul 18
26° / 19°
Sunday
Jul 19
28° / 21°
Monday
Jul 20
28° / 20°
Tuesday
Jul 21
26° / 20°
Wednesday
Jul 22
26° / 20°
Thursday
Jul 23
27° / 20°
Friday
Jul 24
28° / 22°
Saturday
Jul 25
26° / 21°
Sunday
Jul 26
29° / 21°
Monday
Jul 27
28° / 21°
Tuesday
Jul 28
29° / 21°
Wednesday
Jul 29
27° / 21°
Thursday
Jul 30
25° / 21°
Friday
Jul 31
26° / 20°
Weather in August >>

Illinois 30 days weather forecast

Check out our estimated 30 days weather forecast for Illinois, this data is based on the average weather in Illinois in the last few years.

For a more accurate and detailed forecast, check out the 14 day weather for Illinois next to the desired date.

Weather in Illinois for the next 30 days
July
Sun Mon Tue Wed Thu Fri Sat
1
26° /20°
2
26° /18°
3
27° /18°
4
28° /21°
5
29° /22°
6
25° /20°
7
26° /20°
8
25° /19°
9
25° /20°
10
26° /20°
11
27° /19°
12
25° /20°
13
26° /20°
14
28° /20°
15
27° /21°
16
27° /20°
17
25° /20°
18
26° /19°
19
28° /21°
20
28° /20°
21
26° /20°
22
26° /20°
23
27° /20°
24
28° /22°
25
26° /21°
26
29° /21°
27
28° /21°
28
29° /21°
29
27° /21°
30
25° /21°
31
26° /20°
Click on a day for an hourly weather forecast

Illinois long range weather forecast - FAQ

Do you provide 30 days weather forecast for Illinois?
You can see the next 30 weather forecast for Illinois at the top of the page, the next 14 days (from today) are more accurate, while the other is based on average of previous years.
Can I see the weather forecast for a particular date in Illinois?
Sure, you can select the date from the calendar above to view the forecast in Illinois on that date.
How accurate is the long-range weather forecast for Illinois?
Our long-range weather forecast for Illinois is provided by using statistics from previous years. Although we cannot predict the weather months in advance, we can see an average.
Can I see a long-range weather forecast for different countries?
Yes, we provide a 14 day weather forecast and a long-range weather forecast for different countries and cities. You can search for a location in the search box at the top of the page.
Cities in Illinois

For a more accurate weather forecast please select a city

Aurora Champaign Chicago Elgin Joliet Naperville Quincy Rockford Springfield Zion
See more locations
More about the weather in Illinois
Illinois 14 day weather Illinois weather in June Illinois weather in July Illinois Webcam Weather tomorrow Hotels in Illinois