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.

Tuesday
24th Feb
6

-6

1

2
Wednesday
25th Feb
7

-1

3

3
Thursday
26th Feb
7

-2

1

3
Friday
27th Feb
13

-3

11

3
Saturday
28th Feb
15

-1

8

2

5-day weather forecast updated at 04:02 on Tuesday 24th 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 Tuesday 24th February 2026

Expect broken clouds in Decatur, Illinois with a maximum temperature of 6°C, maximum UV of 2 (Low) and 1 hour of bright sunshine. There are 0 mm of rainfall expected and a fresh breeze of 34 kph from the south.

6
°C maximum temperature
-6
°C minimum temperature
broken clouds
1
hour of sunshine
2
UV index (Low)
0
mm of rainfall expected
1
°C wind chill
34
kph wind from S

Decatur weather for Wednesday 25th February 2026

Expect mostly cloudy with light rain in Decatur, Illinois with a maximum temperature of 7°C, maximum UV of 3 (Moderate) and 3 hours of bright sunshine. There are 0-2 mm of rainfall expected with 44% chance of some rain and a gentle breeze of 17 kph from the north-west.

7
°C maximum temperature
-1
°C minimum temperature
mostly cloudy with light rain
3
hours of sunshine
3
UV index (Moderate)
44
% chance of some rain
<2
mm of rainfall expected
4
°C wind chill
17
kph wind from NW

Decatur weather for Thursday 26th February 2026

Expect mostly cloudy with light rain in Decatur, Illinois with a maximum temperature of 7°C, maximum UV of 3 (Moderate) and 1 hour of bright sunshine. There are 2-5 mm of rainfall expected with 23% chance of some rain and a gentle breeze of 16 kph from the north-east.

7
°C maximum temperature
-2
°C minimum temperature
mostly cloudy with light rain
1
hour of sunshine
3
UV index (Moderate)
23
% chance of some rain
<5
mm of rainfall expected
4
°C wind chill
16
kph wind from NE

Decatur weather for Friday 27th February 2026

Expect clear skies in Decatur, Illinois with a maximum temperature of 13°C, maximum UV of 3 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 24 kph from the south.

13
°C maximum temperature
-3
°C minimum temperature
clear skies
11
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
13
°C wind chill
24
kph wind from S

Decatur weather for Saturday 28th February 2026

Expect scattered clouds in Decatur, Illinois with a maximum temperature of 15°C, maximum UV of 2 (Low) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 25 kph from the north.