Illinois weather

Get the latest coronavirus (Covid-19) updates for Illinois with current travel advice and statistics on new cases per 100,000 and vaccine.

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

32
Springfield
29
Chicago

More destinations >>

The Plum Guide: Free cancellation on Illinois rentals

Sale

Get free cancellation on Illinois accommodation
Search by date, browse map or filter by property type
Check upcoming rates & last minute availability

Go to The Plum Guide deal >>

View all The Plum Guide offers

Holiday home finder

Destination

Recommended for Illinois

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

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.

Which is the hottest month in Illinois?

The hottest time of year in Chicago, Illinois is normally July. Expect maximum daytime temperatures to reach 29°C with moderate heat and humidity.

Which month has the most rain in Illinois?

In terms of rainfall, July is usually the wettest month in Chicago, Illinois with 100mm on average. There are normally 10 days in July with some rain.

When is it sunniest in Illinois?

The sunniest time of year in Chicago, Illinois is normally July with bright sunshine on average for 69% of daylight hours; that's 10 hours of sunshine per day.