Illinois weather live forecast

Today's maximum temperature in Illinois is expected to be 18°C. Select a day from the live weather forecast for Illinois (Chicago), USA for more weather parameters.

Thursday
15th Oct
18

16

0

2
Friday
16th Oct
16

10

0

2
Saturday
17th Oct
14

9

4

4
Sunday
18th Oct
17

9

11

4
Monday
19th Oct
19

10

10

4

5-day weather forecast updated at 04:00 on Thursday 15th October 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.

24
Springfield
18
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 15th October 2026

Expect mostly cloudy with rain in Illinois with a maximum temperature of 18°C, maximum UV of 2 (Low) and no hours of bright sunshine. There are 10-20 mm of rainfall expected with 98% chance of some rain and a gentle breeze of 13 kph from the south-east.

18
°C maximum temperature
16
°C minimum temperature
mostly cloudy with rain
0
hours of sunshine
2
UV index (Low)
98
% chance of some rain
<20
mm of rainfall expected
18
°C wind chill
13
kph wind from SE

Illinois weather for Friday 16th October 2026

Expect mostly cloudy with light rain in Illinois with a maximum temperature of 16°C, maximum UV of 2 (Low) and no hours of bright sunshine. There are 2-5 mm of rainfall expected with 65% chance of some rain and a moderate breeze of 23 kph from the north-west.

16
°C maximum temperature
10
°C minimum temperature
mostly cloudy with light rain
0
hours of sunshine
2
UV index (Low)
65
% chance of some rain
<5
mm of rainfall expected
0
no heat & humidity
23
kph wind from NW

Illinois weather for Saturday 17th October 2026

Expect broken clouds in Illinois with a maximum temperature of 14°C, maximum UV of 4 (Moderate) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 18 kph from the north.

14
°C maximum temperature
9
°C minimum temperature
broken clouds
4
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
14
°C wind chill
18
kph wind from N

Illinois weather for Sunday 18th October 2026

Expect clear skies in Illinois with a maximum temperature of 17°C, maximum UV of 4 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 14 kph from the south-west.

17
°C maximum temperature
9
°C minimum temperature
clear skies
11
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
14
kph wind from SW

Illinois weather for Monday 19th October 2026

Expect clear skies in Illinois with a maximum temperature of 19°C, maximum UV of 4 (Moderate) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 8 kph from the south-west.