Illinois weather live forecast

Today's maximum temperature in Illinois is expected to be 22°C. Select a day from the live weather forecast for Illinois (Chicago), USA for more weather parameters.

Wednesday
30th Sep
22

17

1

2
Thursday
1st Oct
21

18

0

4
Friday
2nd Oct
18

14

7

5
Saturday
3rd Oct
17

13

11

5
Sunday
4th Oct
21

12

6

5

5-day weather forecast updated at 04:00 on Thursday 1st October 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.

28
Springfield
22
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 30th September 2026

Expect mostly cloudy with rain in Illinois with a maximum temperature of 22°C, maximum UV of 2 (Low) and 1 hour of bright sunshine. There are 30-40 mm of rainfall expected with 89% chance of some rain and a light breeze of 11 kph from the south.

22
°C maximum temperature
17
°C minimum temperature
mostly cloudy with rain
1
hour of sunshine
2
UV index (Low)
89
% chance of some rain
<40
mm of rainfall expected
22
°C wind chill
11
kph wind from S

Illinois weather for Thursday 1st October 2026

Expect cloudy with some rain in Illinois with a maximum temperature of 21°C, maximum UV of 4 (Moderate) and no hours of bright sunshine. There are 20-30 mm of rainfall expected with 100% chance of some rain and a light breeze of 9 kph from the north.

21
°C maximum temperature
18
°C minimum temperature
cloudy with some rain
0
hours of sunshine
4
UV index (Moderate)
100
% chance of some rain
<30
mm of rainfall expected
0
no heat & humidity
9
kph wind from N

Illinois weather for Friday 2nd October 2026

Expect sunshine and showers in Illinois with a maximum temperature of 18°C, maximum UV of 5 (Moderate) and 7 hours of bright sunshine. There are 2-5 mm of rainfall expected with 4% chance of some rain and a light breeze of 12 kph from the north.

18
°C maximum temperature
14
°C minimum temperature
sunshine and showers
7
hours of sunshine
5
UV index (Moderate)
4
% chance of some rain
<5
mm of rainfall expected
18
°C wind chill
12
kph wind from N

Illinois weather for Saturday 3rd October 2026

Expect scattered clouds in Illinois with a maximum temperature of 17°C, maximum UV of 5 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 6 kph from the east.

17
°C maximum temperature
13
°C minimum temperature
scattered clouds
11
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
6
kph wind from E

Illinois weather for Sunday 4th October 2026

Expect scattered clouds in Illinois with a maximum temperature of 21°C, maximum UV of 5 (Moderate) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 9 kph from the north-west.