Illinois weather in April 2025

Expect 59°F daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Illinois in April. Check more long-term weather averages for Illinois in April before you book your next holiday to Illinois in 2025/2026.

59
59°F max day temperature
7
7 hours of sunshine per day
13
13 days with some rainfall
37
37°F min night temperature
13
13 hours of daylight per day
0
No heat & humidity
3.8
3.8 inches of monthly rainfall
6
6 (High) UV index
37
37°F sea temperature

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The April weather guide for Illinois (Chicago) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Top Illinois destinations

Below are average maximum temperatures at popular destinations in Illinois in April. Select a destination to see more weather parameters.

64
Springfield
59
Chicago

All Illinois destinations

Metric (°C) | Imperial (°F)

More about the USA

How warm is it in Illinois in April?

Daytime temperatures usually reach 59°F in Chicago, Illinois in April, falling to 37°F at night.

How sunny is it in Illinois in April?

There are normally 7 hours of bright sunshine each day in Chicago, Illinois in April - that's 55% of daylight hours.

How warm is the sea around Illinois in April?

The average sea temperature around Chicago, Illinois in April is 37°F.

Does it rain in Illinois in April?

There are usually 13 days with some rain in Chicago, Illinois in April and the average monthly rainfall is 3.8 inches.

Illinois April sunrise & sunset times

Browse the sunrise and sunset times for Illinois in April 2025. Select a month to view Illinois sunrise and sunset times for the next 12 months. The Illinois sunrise and sunset times shown below are for Chicago.

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

Date	Sunrise times	Sunset times
Tuesday, 1st April 2025	05:33	18:16
Tuesday, 15th April 2025	05:10	18:32
Wednesday, 30th April 2025	04:48	18:49

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Illinois - quick facts
Flight time^✝	8.5 hours
Time difference	UK -6 hours
Language(s)	English
Currency	US Dollar
Electricity	A + B plug (120V)
Driving side	Right
Visa^✝	Yes
Why visit?	Culture
Tourist info	Illinois Department of Commerce & Economic Opportunity