Decatur weather live forecast

Today's maximum temperature in Decatur is expected to be 6°C. Select a day from the live weather forecast for Decatur, Illinois, USA for more weather parameters.

Monday
9th Feb
6

-9

9

3
Tuesday
10th Feb
11

0

9

3
Wednesday
11th Feb
7

-2

11

3
Thursday
12th Feb
6

-2

0

1
Friday
13th Feb
9

-2

10

2

5-day weather forecast updated at 04:01 on Tuesday 10th 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 Monday 9th February 2026

Expect scattered clouds in Decatur, Illinois with a maximum temperature of 6°C, maximum UV of 3 (Moderate) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 21 kph from the south.

6
°C maximum temperature
-9
°C minimum temperature
scattered clouds
9
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
2
°C wind chill
21
kph wind from S

Decatur weather for Tuesday 10th February 2026

Expect scattered clouds in Decatur, Illinois with a maximum temperature of 11°C, maximum UV of 3 (Moderate) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 22 kph from the north-west.

11
°C maximum temperature
0
°C minimum temperature
scattered clouds
9
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
11
°C wind chill
22
kph wind from NW

Decatur weather for Wednesday 11th February 2026

Expect clear skies in Decatur, Illinois with a maximum temperature of 7°C, maximum UV of 3 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the north-west.

7
°C maximum temperature
-2
°C minimum temperature
clear skies
11
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
4
°C wind chill
17
kph wind from NW

Decatur weather for Thursday 12th February 2026

Expect broken clouds in Decatur, Illinois with a maximum temperature of 6°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 13 kph from the south-east.

6
°C maximum temperature
-2
°C minimum temperature
broken clouds
0
hours of sunshine
1
UV index (Low)
0
mm of rainfall expected
3
°C wind chill
13
kph wind from SE

Decatur weather for Friday 13th February 2026

Expect clear skies in Decatur, Illinois with a maximum temperature of 9°C, maximum UV of 2 (Low) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the south-east.