Illinois weather live forecast

Today's maximum temperature in Illinois is expected to be 30°C. Select a day from the live weather forecast for Illinois (Chicago), USA for more weather parameters.

Tuesday
21st Jul
30

20

13

7
Wednesday
22nd Jul
20

19

12

8
Thursday
23rd Jul
23

18

10

7
Friday
24th Jul
24

20

9

8
Saturday
25th Jul
26

20

13

9

5-day weather forecast updated at 04:00 on Wednesday 22nd July 2026 GMT

More about Illinois

Illinois by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Illinois

TUI: Top deals & discounts on 2026/2027 holidays

Sale

Explore latest special offers & online deals from TUI
Free child places & £0 deposits with direct debit available
Book summer & winter sun holidays in 2026/2027

Go to TUI deal >>

View all TUI offers

TUI deal finder

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.

31
Springfield
30
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 Tuesday 21st July 2026

Expect isolated thunderstorms in Illinois with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 7 (High) and 13 hours of bright sunshine. There are 5-10 mm of rainfall expected with 35% chance of some rain and a gentle breeze of 13 kph from the west.

30
°C maximum temperature
20
°C minimum temperature
isolated thunderstorms
13
hours of sunshine
7
UV index (High)
35
% chance of some rain
<10
mm of rainfall expected
M
moderate heat & humidity
13
kph wind from W

Illinois weather for Wednesday 22nd July 2026

Expect scattered clouds in Illinois with a maximum temperature of 20°C, maximum UV of 8 (Very High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 13 kph from the north.

20
°C maximum temperature
19
°C minimum temperature
scattered clouds
12
hours of sunshine
8
UV index (Very High)
0
mm of rainfall expected
0
no heat & humidity
13
kph wind from N

Illinois weather for Thursday 23rd July 2026

Expect scattered clouds in Illinois with a maximum temperature of 23°C, maximum UV of 7 (High) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 4 kph from the south-east.

23
°C maximum temperature
18
°C minimum temperature
scattered clouds
10
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
23
°C wind chill
4
kph wind from SE

Illinois weather for Friday 24th July 2026

Expect scattered clouds in Illinois with a maximum temperature of 24°C, maximum UV of 8 (Very High) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 6 kph from the south-east.

24
°C maximum temperature
20
°C minimum temperature
scattered clouds
9
hours of sunshine
8
UV index (Very High)
0
mm of rainfall expected
0
no heat & humidity
6
kph wind from SE

Illinois weather for Saturday 25th July 2026

Expect scattered clouds in Illinois with a maximum temperature of 26°C, low levels of heat & humidity, maximum UV of 9 (Very High) and 13 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 8 kph from the south-west.