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.

Wednesday
18th Feb
18

11

10

2
Thursday
19th Feb
15

8

2

2
Friday
20th Feb
10

1

1

1
Saturday
21st Feb
3

-1

0

2
Sunday
22nd Feb
1

-3

3

2

5-day weather forecast updated at 04:01 on Wednesday 18th February 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.

20
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 Wednesday 18th February 2026

Expect scattered clouds in Illinois with a maximum temperature of 18°C, maximum UV of 2 (Low) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the south-west.

18
°C maximum temperature
11
°C minimum temperature
scattered clouds
10
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
18
°C wind chill
15
kph wind from SW

Illinois weather for Thursday 19th February 2026

Expect mostly cloudy with light rain in Illinois with a maximum temperature of 15°C, maximum UV of 2 (Low) and 2 hours of bright sunshine. There are 2-5 mm of rainfall expected with 82% chance of some rain and a light breeze of 9 kph from the south-east.

15
°C maximum temperature
8
°C minimum temperature
mostly cloudy with light rain
2
hours of sunshine
2
UV index (Low)
82
% chance of some rain
<5
mm of rainfall expected
15
°C wind chill
9
kph wind from SE

Illinois weather for Friday 20th February 2026

Expect broken clouds in Illinois with a maximum temperature of 10°C, maximum UV of 1 (Low) and 1 hour of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 21 kph from the west.

10
°C maximum temperature
1
°C minimum temperature
broken clouds
1
hour of sunshine
1
UV index (Low)
0
mm of rainfall expected
0
no heat & humidity
21
kph wind from W

Illinois weather for Saturday 21st February 2026

Expect broken clouds in Illinois with a maximum temperature of 3°C, maximum UV of 2 (Low) and no hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the north-west.

3
°C maximum temperature
-1
°C minimum temperature
broken clouds
0
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
1
°C wind chill
10
kph wind from NW

Illinois weather for Sunday 22nd February 2026

Expect broken clouds in Illinois with a maximum temperature of 1°C, maximum UV of 2 (Low) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 14 kph from the north-west.