Illinois weather averages

Check Illinois weather averages before you book your next holiday in 2018/2019. Today's maximum temperature in Illinois is expected to be 5°C, while the average maximum temperature in January is -1°C. The holiday weather guide shown above is for Chicago.

More about Illinois

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec All months

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Tropical storm risk: Illinois hurricane season

% of month affected by tropical storms
0
0
0
0
0
<1%
<1%
0
<1%
0
0
0
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

The Illinois tropical storm risk chart above shows the hurricane season for Chicago, Illinois.

More about tropical storms

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Illinois holiday weather averages by month

Check Illinois holiday weather averages for a particular month by selecting from the list below. Monthly weather guides include figures for temperature, rainfall, sunshine hours and sea temperature plus daily sunrise & sunset times.

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Compare Illinois weather with the USA

Below the Illinois weather chart shows maximum daytime temperature for Illinois, USA (Chicago) and the USA (Washington). For more weather parameters or to change the destinations shown visit the comparison weather tool.

Maximum daytime temperature (°C)

Illinois, USA (Chicago)
USA (Washington)
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C / mm)  |  Imperial (°F / inches)

Compare more Illinois weather >>

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More Illinois destinations

All destinations (A to Z)

Can't see your chosen destination? Use our A to Z search to find your required the holiday weather guide:

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