Illinois weather

Below are the temperatures expected today at popular destinations in Illinois. Select a destination to compare today's forecast with average weather conditions.

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The weather guide for Illinois shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by MeteoBlue. Find out more about our data sources.

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

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Compare Illinois weather with the USA

Below the Illinois weather chart shows average maximum daytime temperature for Illinois, USA (Chicago) and the USA (Washington).

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)

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