Decatur weather live forecast

Today's maximum temperature in Decatur is expected to be 25°F. Select a day from the live weather forecast for Decatur, Illinois, USA for more weather parameters.

Wednesday
4th Feb
25

18

3

2
Thursday
5th Feb
28

16

2

2
Friday
6th Feb
41

30

1

2
Saturday
7th Feb
34

27

8

3
Sunday
8th Feb
41

28

3

2

5-day weather forecast updated at 04:02 on Wednesday 4th February 2026 GMT

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

Decatur weather forecast by day

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

Decatur weather for Wednesday 4th February 2026

Expect broken clouds in Decatur, Illinois with a maximum temperature of 25°F, maximum UV of 2 (Low) and 3 hours of bright sunshine. There are 0 cm of snow expected and a gentle breeze of 9 mph from the north-east.

25
°F maximum temperature
18
°F minimum temperature
broken clouds
3
hours of sunshine
2
UV index (Low)
0
cm of snow expected
16
°F wind chill
9
mph wind from NE

Decatur weather for Thursday 5th February 2026

Expect broken clouds in Decatur, Illinois with a maximum temperature of 28°F, maximum UV of 2 (Low) and 2 hours of bright sunshine. There are 0 cm of snow expected and a moderate breeze of 13 mph from the south-west.

28
°F maximum temperature
16
°F minimum temperature
broken clouds
2
hours of sunshine
2
UV index (Low)
0
cm of snow expected
19
°F wind chill
13
mph wind from SW

Decatur weather for Friday 6th February 2026

Expect broken clouds in Decatur, Illinois with a maximum temperature of 41°F, maximum UV of 2 (Low) and 1 hour of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 17 mph from the north-west.

41
°F maximum temperature
30
°F minimum temperature
broken clouds
1
hour of sunshine
2
UV index (Low)
0
mm of rainfall expected
32
°F wind chill
17
mph wind from NW

Decatur weather for Saturday 7th February 2026

Expect scattered clouds in Decatur, Illinois with a maximum temperature of 34°F, maximum UV of 3 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 13 mph from the south-east.

34
°F maximum temperature
27
°F minimum temperature
scattered clouds
8
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
25
°F wind chill
13
mph wind from SE

Decatur weather for Sunday 8th February 2026

Expect broken clouds in Decatur, Illinois with a maximum temperature of 41°F, maximum UV of 2 (Low) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 12 mph from the south-east.