Illinois weather live forecast

Today's maximum temperature in Illinois is expected to be 15°C. Select a day from the live weather forecast for Illinois (Chicago), USA for more weather parameters.

Sunday
15th Mar
15

2

1

1
Monday
16th Mar
1

-8

3

2
Tuesday
17th Mar
-4

-9

9

4
Wednesday
18th Mar
5

-4

8

3
Thursday
19th Mar
11

3

11

2

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

17
Springfield
15
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 Sunday 15th March 2026

Expect mostly cloudy with rain in Illinois with a maximum temperature of 15°C, maximum UV of 1 (Low) and 1 hour of bright sunshine. There are 10-20 mm of rainfall expected with 99% chance of some rain and a gentle breeze of 19 kph from the south.

15
°C maximum temperature
2
°C minimum temperature
mostly cloudy with rain
1
hour of sunshine
1
UV index (Low)
99
% chance of some rain
<20
mm of rainfall expected
0
no heat & humidity
19
kph wind from S

Illinois weather for Monday 16th March 2026

Expect mostly cloudy with light snow in Illinois with a maximum temperature of 1°C, maximum UV of 2 (Low) and 3 hours of bright sunshine. There are 2-5 cm of snow expected with 53% chance of some snow and a moderate breeze of 23 kph from the north-west.

1
°C maximum temperature
-8
°C minimum temperature
mostly cloudy with light snow
3
hours of sunshine
2
UV index (Low)
53
% chance of some snow
<5
cm of snow expected
-5
°C wind chill
23
kph wind from NW

Illinois weather for Tuesday 17th March 2026

Expect clear skies with flurries of snow in Illinois with a maximum temperature of -4°C, maximum UV of 4 (Moderate) and 9 hours of bright sunshine. There are 0-2 cm of snow expected with 60% chance of some snow and a gentle breeze of 14 kph from the north-west.

-4
°C maximum temperature
-9
°C minimum temperature
clear skies with flurries of snow
9
hours of sunshine
4
UV index (Moderate)
60
% chance of some snow
<2
cm of snow expected
-9
°C wind chill
14
kph wind from NW

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 3 (Moderate) and 8 hours of bright sunshine. There are 2-5 cm of snow expected with 37% chance of some snow and a gentle breeze of 15 kph from the south.

5
°C maximum temperature
-4
°C minimum temperature
clear skies with flurries of snow
8
hours of sunshine
3
UV index (Moderate)
37
% chance of some snow
<5
cm of snow expected
2
°C wind chill
15
kph wind from S

Illinois weather for Thursday 19th March 2026

Expect scattered clouds in Illinois with a maximum temperature of 11°C, maximum UV of 2 (Low) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 8 kph from the north.