Illinois weather live forecast

Today's maximum temperature in Illinois is expected to be 15°C. Select a day from the live weather forecast for Illinois (Chicago), USA for more weather parameters.

Wednesday
20th May
15

9

9

UV8
Thursday
21st May
14

10

5

UV8
Friday
22nd May
16

12

0

UV6
Saturday
23rd May
19

13

0

UV4
Sunday
24th May
23

14

5

UV3

5-day weather forecast updated at 04:00 on Wednesday 20th May 2026 GMT

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Destination

The 5-day weather forecast for Illinois (Chicago) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Top Illinois destinations

Below are temperatures expected today at popular countries, regions and places in Illinois. Select a destination to see the detailed weather forecast for today, tomorrow and the outlook for the next five days.

19
Springfield
15
Chicago

All Illinois destinations

Illinois weather forecast by day

Below are the detailed weather forecasts for Illinois for the next 5 days. The forecasts shown are for Chicago and may not represent the whole of Illinois. Browse more destinations in Illinois to view more weather forecasts.

Illinois weather for Wednesday 20th May 2026

Expect scattered clouds in Illinois with a maximum temperature of 15°C, maximum UV of 8 (Very High) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the north.

15
°C maximum temperature
9
°C minimum temperature
scattered clouds
9
hours of sunshine
UV8
UV index (Very High)
0
mm of rainfall expected
0
no heat & humidity
12
kph wind from N

Illinois weather for Thursday 21st May 2026

Expect broken clouds in Illinois with a maximum temperature of 14°C, maximum UV of 8 (Very High) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the north-east.

14
°C maximum temperature
10
°C minimum temperature
broken clouds
5
hours of sunshine
UV8
UV index (Very High)
0
mm of rainfall expected
14
°C wind chill
11
kph wind from NE

Illinois weather for Friday 22nd May 2026

Expect cloudy with some rain in Illinois with a maximum temperature of 16°C, maximum UV of 6 (High) and no hours of bright sunshine. There are 5-10 mm of rainfall expected with 53% chance of some rain and a light breeze of 10 kph from the north-east.

16
°C maximum temperature
12
°C minimum temperature
cloudy with some rain
0
hours of sunshine
UV6
UV index (High)
53
% chance of some rain
<10
mm of rainfall expected
16
°C wind chill
10
kph wind from NE

Illinois weather for Saturday 23rd May 2026

Expect overcast with light rain in Illinois with a maximum temperature of 19°C, maximum UV of 4 (Moderate) and no hours of bright sunshine. There are 0-2 mm of rainfall expected with 24% chance of some rain and a light breeze of 8 kph from the north-east.

19
°C maximum temperature
13
°C minimum temperature
overcast with light rain
0
hours of sunshine
UV4
UV index (Moderate)
24
% chance of some rain
<2
mm of rainfall expected
19
°C wind chill
8
kph wind from NE

Illinois weather for Sunday 24th May 2026

Expect broken clouds in Illinois with a maximum temperature of 23°C, maximum UV of 3 (Moderate) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 2 kph from the east.