Illinois weather live forecast

Today's maximum temperature in Illinois is expected to be 27°C. Select a day from the live weather forecast for Illinois (Chicago), USA for more weather parameters.

Friday
31st Jul
27

22

2

5
Saturday
1st Aug
22

19

0

2
Sunday
2nd Aug
21

19

5

7
Monday
3rd Aug
23

19

6

9
Tuesday
4th Aug
25

19

8

8

5-day weather forecast updated at 04:00 on Friday 31st July 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.

27
Chicago
25
Springfield

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 Friday 31st July 2026

Expect mostly cloudy with light rain in Illinois with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 5 (Moderate) and 2 hours of bright sunshine. There are 2-5 mm of rainfall expected with 74% chance of some rain and a light breeze of 10 kph from the south.

27
°C maximum temperature
22
°C minimum temperature
mostly cloudy with light rain
2
hours of sunshine
5
UV index (Moderate)
74
% chance of some rain
<5
mm of rainfall expected
L
low heat & humidity
10
kph wind from S

Illinois weather for Saturday 1st August 2026

Expect cloudy with some rain in Illinois with a maximum temperature of 22°C, maximum UV of 2 (Low) and no hours of bright sunshine. There are 20-30 mm of rainfall expected with 90% chance of some rain and a gentle breeze of 17 kph from the north-east.

22
°C maximum temperature
19
°C minimum temperature
cloudy with some rain
0
hours of sunshine
2
UV index (Low)
90
% chance of some rain
<30
mm of rainfall expected
22
°C wind chill
17
kph wind from NE

Illinois weather for Sunday 2nd August 2026

Expect mostly cloudy with rain in Illinois with a maximum temperature of 21°C, maximum UV of 7 (High) and 5 hours of bright sunshine. There are 5-10 mm of rainfall expected with 19% chance of some rain and a gentle breeze of 15 kph from the north.

21
°C maximum temperature
19
°C minimum temperature
mostly cloudy with rain
5
hours of sunshine
7
UV index (High)
19
% chance of some rain
<10
mm of rainfall expected
21
°C wind chill
15
kph wind from N

Illinois weather for Monday 3rd August 2026

Expect broken clouds in Illinois with a maximum temperature of 23°C, maximum UV of 9 (Very High) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 6 kph from the north-east.

23
°C maximum temperature
19
°C minimum temperature
broken clouds
6
hours of sunshine
9
UV index (Very High)
0
mm of rainfall expected
23
°C wind chill
6
kph wind from NE

Illinois weather for Tuesday 4th August 2026

Expect scattered clouds in Illinois with a maximum temperature of 25°C, maximum UV of 8 (Very High) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 5 kph from the east.