Illinois weather in May 2024

Expect 21°C daytime maximum temperatures in the shade with on average 9 hours of sunshine per day in Illinois in May. Check more long-term weather averages for Illinois in May before you book your next holiday to Illinois in 2024/2025.

21
21°C max day temperature
9
9 hours of sunshine per day
11
11 days with some rainfall
9
9°C min night temperature
15
15 hours of daylight per day
0
No heat & humidity
84
84 mm of monthly rainfall
7
7 (High) UV index
6
6°C sea temperature

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The May 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 May. Select a destination to see more weather parameters.

24
Springfield
21
Chicago

All Illinois destinations

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

More about the USA

How hot is it in Illinois in May?

Daytime temperatures usually reach 21°C in Chicago, Illinois in May, falling to 9°C at night.

How sunny is it in Illinois in May?

There are normally 9 hours of bright sunshine each day in Chicago, Illinois in May - that's 62% of daylight hours.

Is the sea cold around Illinois in May?

The average sea temperature around Chicago, Illinois in May is 6°C.

Does it rain in Illinois in May?

There are usually 11 days with some rain in Chicago, Illinois in May and the average monthly rainfall is 84mm.

Illinois May sunrise & sunset times

Browse the sunrise and sunset times for Illinois in May 2024. 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
Wednesday, 1st May 2024	05:46	19:50
Thursday, 16th May 2024	05:29	20:06
Friday, 31st May 2024	05:18	20:19

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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