Illinois weather live forecast

Today's maximum temperature in Illinois is expected to be 14°C. Select a day from the live weather forecast for Illinois (Chicago), USA for more weather parameters.

Sunday
28th Dec
14

-4

1

0
Monday
29th Dec
-3

-7

2

1
Tuesday
30th Dec
0

-8

2

1
Wednesday
31st Dec
1

-8

0

1
Thursday
1st Jan
-8

-11

7

1

5-day weather forecast updated at 04:01 on Monday 29th December 2025 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
14
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 28th December 2025

Expect isolated thunderstorms in Illinois with a maximum temperature of 14°C and 1 hour of bright sunshine. There are 20-30 mm of rainfall expected with 100% chance of some rain and a moderate breeze of 25 kph from the west.

14
°C maximum temperature
-4
°C minimum temperature
isolated thunderstorms
1
hour of sunshine
0
UV index (None)
100
% chance of some rain
<30
mm of rainfall expected
14
°C wind chill
25
kph wind from W

Illinois weather for Monday 29th December 2025

Expect mostly cloudy with light snow in Illinois with a maximum temperature of -3°C, maximum UV of 1 (Low) and 2 hours of bright sunshine. There are 0-2 cm of snow expected with 11% chance of some snow and a moderate breeze of 26 kph from the north-west.

-3
°C maximum temperature
-7
°C minimum temperature
mostly cloudy with light snow
2
hours of sunshine
1
UV index (Low)
11
% chance of some snow
<2
cm of snow expected
-9
°C wind chill
26
kph wind from NW

Illinois weather for Tuesday 30th December 2025

Expect broken clouds in Illinois with a maximum temperature of 0°C, maximum UV of 1 (Low) and 2 hours of bright sunshine. There are 0 cm of snow expected and a gentle breeze of 13 kph from the west.

0
°C maximum temperature
-8
°C minimum temperature
broken clouds
2
hours of sunshine
1
UV index (Low)
0
cm of snow expected
-5
°C wind chill
13
kph wind from W

Illinois weather for Wednesday 31st December 2025

Expect broken clouds in Illinois with a maximum temperature of 1°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the north-west.

1
°C maximum temperature
-8
°C minimum temperature
broken clouds
0
hours of sunshine
1
UV index (Low)
0
mm of rainfall expected
-3
°C wind chill
12
kph wind from NW

Illinois weather for Thursday 1st January 2026

Expect scattered clouds in Illinois with a maximum temperature of -8°C, maximum UV of 1 (Low) and 7 hours of bright sunshine. There are 0 cm of snow expected and a light breeze of 10 kph from the west.