Chicago weather live forecast

Today's maximum temperature in Chicago is expected to be 21°C. Select a day from the live weather forecast for Chicago, Illinois, USA for more weather parameters.

Sunday
20th Sep
21

18

1

5
Monday
21st Sep
18

16

1

4
Tuesday
22nd Sep
16

15

1

5
Wednesday
23rd Sep
17

15

0

4
Thursday
24th Sep
17

15

1

5

5-day weather forecast updated at 04:00 on Sunday 20th September 2026 GMT

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The 5-day weather forecast for Illinois (Chicago) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Chicago weather forecast by day

Below are the detailed weather forecasts for Chicago for the next 5 days.

Chicago weather for Sunday 20th September 2026

Expect isolated thunderstorms in Chicago, Illinois with a maximum temperature of 21°C, maximum UV of 5 (Moderate) and 1 hour of bright sunshine. There are 30-40 mm of rainfall expected with 77% chance of some rain and a gentle breeze of 17 kph from the north-east.

21
°C maximum temperature
18
°C minimum temperature
isolated thunderstorms
1
hour of sunshine
5
UV index (Moderate)
77
% chance of some rain
<40
mm of rainfall expected
21
°C wind chill
17
kph wind from NE

Chicago weather for Monday 21st September 2026

Expect mostly cloudy with light rain in Chicago, Illinois with a maximum temperature of 18°C, maximum UV of 4 (Moderate) and 1 hour of bright sunshine. There are 2-5 mm of rainfall expected with 24% chance of some rain and a gentle breeze of 17 kph from the north-east.

18
°C maximum temperature
16
°C minimum temperature
mostly cloudy with light rain
1
hour of sunshine
4
UV index (Moderate)
24
% chance of some rain
<5
mm of rainfall expected
0
no heat & humidity
17
kph wind from NE

Chicago weather for Tuesday 22nd September 2026

Expect mostly cloudy with light rain in Chicago, Illinois with a maximum temperature of 16°C, maximum UV of 5 (Moderate) and 1 hour of bright sunshine. There are 0-2 mm of rainfall expected with 25% chance of some rain and a gentle breeze of 14 kph from the north-east.

16
°C maximum temperature
15
°C minimum temperature
mostly cloudy with light rain
1
hour of sunshine
5
UV index (Moderate)
25
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
14
kph wind from NE

Chicago weather for Wednesday 23rd September 2026

Expect overcast skies in Chicago, Illinois with a maximum temperature of 17°C, maximum UV of 4 (Moderate) and no hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the north-east.

17
°C maximum temperature
15
°C minimum temperature
overcast skies
0
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
12
kph wind from NE

Chicago weather for Thursday 24th September 2026

Expect overcast skies in Chicago, Illinois with a maximum temperature of 17°C, maximum UV of 5 (Moderate) and 1 hour of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 9 kph from the north-east.