Illinois weather live forecast

Today's maximum temperature in Illinois is expected to be 32°C. Select a day from the live weather forecast for Illinois (Chicago), USA for more weather parameters.

Monday
31st Aug
32

24

7

6
Tuesday
1st Sep
32

26

6

6
Wednesday
2nd Sep
34

27

8

7
Thursday
3rd Sep
29

26

6

6
Friday
4th Sep
29

25

11

7

5-day weather forecast updated at 04:00 on Monday 31st August 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.

35
Springfield
32
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 Monday 31st August 2026

Expect broken clouds in Illinois with a maximum temperature of 32°C, moderate levels of heat & humidity, maximum UV of 6 (High) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the south-west.

32
°C maximum temperature
24
°C minimum temperature
broken clouds
7
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
M
moderate heat & humidity
12
kph wind from SW

Illinois weather for Tuesday 1st September 2026

Expect isolated thunderstorms in Illinois with a maximum temperature of 32°C, moderate levels of heat & humidity, maximum UV of 6 (High) and 6 hours of bright sunshine. There are 2-5 mm of rainfall expected with 31% chance of some rain and a light breeze of 8 kph from the south-west.

32
°C maximum temperature
26
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
6
UV index (High)
31
% chance of some rain
<5
mm of rainfall expected
M
moderate heat & humidity
8
kph wind from SW

Illinois weather for Wednesday 2nd September 2026

Expect scattered clouds in Illinois with a maximum temperature of 34°C, high levels of heat & humidity, maximum UV of 7 (High) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 kph from the south-west.

34
°C maximum temperature
27
°C minimum temperature
scattered clouds
8
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
H
high heat & humidity
7
kph wind from SW

Illinois weather for Thursday 3rd September 2026

Expect sunshine and showers in Illinois with a maximum temperature of 29°C, moderate levels of heat & humidity, maximum UV of 6 (High) and 6 hours of bright sunshine. There are 2-5 mm of rainfall expected with 29% chance of some rain and a light breeze of 7 kph from the north-east.

29
°C maximum temperature
26
°C minimum temperature
sunshine and showers
6
hours of sunshine
6
UV index (High)
29
% chance of some rain
<5
mm of rainfall expected
M
moderate heat & humidity
7
kph wind from NE

Illinois weather for Friday 4th September 2026

Expect scattered clouds in Illinois with a maximum temperature of 29°C, moderate levels of heat & humidity, maximum UV of 7 (High) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 kph from the east.