Illinois weather live forecast

Today's maximum temperature in Illinois is expected to be 5°C. Select a day from the live weather forecast for Illinois (Chicago), USA for more weather parameters.

Wednesday
18th Mar
5

-4

5

4
Thursday
19th Mar
11

2

5

4
Friday
20th Mar
15

5

2

5
Saturday
21st Mar
17

5

8

4
Sunday
22nd Mar
12

1

0

3

5-day weather forecast updated at 04:00 on Wednesday 18th March 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.

12
Springfield
5
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 March 2026

Expect clear skies with flurries of snow in Illinois with a maximum temperature of 5°C, maximum UV of 4 (Moderate) and 5 hours of bright sunshine. There are 0-2 cm of snow expected with 15% chance of some snow and a gentle breeze of 13 kph from the south.

5
°C maximum temperature
-4
°C minimum temperature
clear skies with flurries of snow
5
hours of sunshine
4
UV index (Moderate)
15
% chance of some snow
<2
cm of snow expected
3
°C wind chill
13
kph wind from S

Illinois weather for Thursday 19th March 2026

Expect broken clouds in Illinois with a maximum temperature of 11°C, maximum UV of 4 (Moderate) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 5 kph from the north-east.

11
°C maximum temperature
2
°C minimum temperature
broken clouds
5
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
11
°C wind chill
5
kph wind from NE

Illinois weather for Friday 20th March 2026

Expect broken clouds in Illinois with a maximum temperature of 15°C, maximum UV of 5 (Moderate) and 2 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the south-west.

15
°C maximum temperature
5
°C minimum temperature
broken clouds
2
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
10
kph wind from SW

Illinois weather for Saturday 21st March 2026

Expect broken clouds in Illinois with a maximum temperature of 17°C, maximum UV of 4 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the south-west.

17
°C maximum temperature
5
°C minimum temperature
broken clouds
8
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
10
kph wind from SW

Illinois weather for Sunday 22nd March 2026

Expect broken clouds in Illinois with a maximum temperature of 12°C, maximum UV of 3 (Moderate) and no hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 18 kph from the north.