Illinois weather live forecast

Today's maximum temperature in Illinois is expected to be 21°C. Select a day from the live weather forecast for Illinois (Chicago), USA for more weather parameters.

Wednesday
21st Oct
21

11

10

4
Thursday
22nd Oct
21

13

10

3
Friday
23rd Oct
21

13

9

3
Saturday
24th Oct
21

13

8

4
Sunday
25th Oct
22

14

7

3

5-day weather forecast updated at 04:00 on Wednesday 21st October 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.

23
Springfield
21
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 21st October 2026

Expect scattered clouds in Illinois with a maximum temperature of 21°C, maximum UV of 4 (Moderate) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 2 kph from the south.

21
°C maximum temperature
11
°C minimum temperature
scattered clouds
10
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
2
kph wind from S

Illinois weather for Thursday 22nd October 2026

Expect scattered clouds in Illinois with a maximum temperature of 21°C, maximum UV of 3 (Moderate) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 4 kph from the north-east.

21
°C maximum temperature
13
°C minimum temperature
scattered clouds
10
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
21
°C wind chill
4
kph wind from NE

Illinois weather for Friday 23rd October 2026

Expect scattered clouds in Illinois with a maximum temperature of 21°C, maximum UV of 3 (Moderate) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 kph from the south-east.

21
°C maximum temperature
13
°C minimum temperature
scattered clouds
9
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
21
°C wind chill
7
kph wind from SE

Illinois weather for Saturday 24th October 2026

Expect scattered clouds in Illinois with a maximum temperature of 21°C, maximum UV of 4 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 kph from the south.

21
°C maximum temperature
13
°C minimum temperature
scattered clouds
8
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
7
kph wind from S

Illinois weather for Sunday 25th October 2026

Expect scattered clouds in Illinois with a maximum temperature of 22°C, maximum UV of 3 (Moderate) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 kph from the south-west.