Illinois weather live forecast

Today's maximum temperature in Illinois is expected to be 26°C. Select a day from the live weather forecast for Illinois (Chicago), USA for more weather parameters.

Thursday
27th Aug
26

22

12

6
Friday
28th Aug
26

21

10

6
Saturday
29th Aug
27

21

6

6
Sunday
30th Aug
32

22

8

6
Monday
31st Aug
32

26

7

6

5-day weather forecast updated at 04:00 on Thursday 27th 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.

28
Springfield
26
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 Thursday 27th August 2026

Expect scattered clouds in Illinois with a maximum temperature of 26°C, maximum UV of 6 (High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 6 kph from the north-east.

26
°C maximum temperature
22
°C minimum temperature
scattered clouds
12
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
26
°C wind chill
6
kph wind from NE

Illinois weather for Friday 28th August 2026

Expect scattered clouds in Illinois with a maximum temperature of 26°C, maximum UV of 6 (High) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 6 kph from the east.

26
°C maximum temperature
21
°C minimum temperature
scattered clouds
10
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
26
°C wind chill
6
kph wind from E

Illinois weather for Saturday 29th August 2026

Expect broken clouds in Illinois with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 6 (High) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 9 kph from the south.

27
°C maximum temperature
21
°C minimum temperature
broken clouds
6
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
L
low heat & humidity
9
kph wind from S

Illinois weather for Sunday 30th August 2026

Expect isolated thunderstorms in Illinois with a maximum temperature of 32°C, moderate levels of heat & humidity, maximum UV of 6 (High) and 8 hours of bright sunshine. There are 0-2 mm of rainfall expected with 34% chance of some rain and a gentle breeze of 14 kph from the south.

32
°C maximum temperature
22
°C minimum temperature
isolated thunderstorms
8
hours of sunshine
6
UV index (High)
34
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
14
kph wind from S

Illinois weather for Monday 31st August 2026

Expect sunshine and showers 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 0-2 mm of rainfall expected with 39% chance of some rain and a light breeze of 11 kph from the south-west.