Decatur weather live forecast

Today's maximum temperature in Decatur is expected to be 13°C. Select a day from the live weather forecast for Decatur, Illinois, USA for more weather parameters.

Monday
6th Apr
13

5

10

6
Tuesday
7th Apr
8

2

1

6
Wednesday
8th Apr
20

3

5

5
Thursday
9th Apr
22

12

4

4
Friday
10th Apr
19

12

2

3

5-day weather forecast updated at 04:01 on Monday 6th April 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 6th April 2026

Expect scattered clouds in Decatur, Illinois with a maximum temperature of 13°C, maximum UV of 6 (High) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 22 kph from the north-west.

13
°C maximum temperature
5
°C minimum temperature
scattered clouds
10
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
22
kph wind from NW

Decatur weather for Tuesday 7th April 2026

Expect overcast skies in Decatur, Illinois with a maximum temperature of 8°C, maximum UV of 6 (High) and 1 hour of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 21 kph from the east.

8
°C maximum temperature
2
°C minimum temperature
overcast skies
1
hour of sunshine
6
UV index (High)
0
mm of rainfall expected
5
°C wind chill
21
kph wind from E

Decatur weather for Wednesday 8th April 2026

Expect broken clouds in Decatur, Illinois with a maximum temperature of 20°C, maximum UV of 5 (Moderate) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a fresh breeze of 30 kph from the south.

20
°C maximum temperature
3
°C minimum temperature
broken clouds
5
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
30
kph wind from S

Decatur weather for Thursday 9th April 2026

Expect mostly cloudy with light rain in Decatur, Illinois with a maximum temperature of 22°C, maximum UV of 4 (Moderate) and 4 hours of bright sunshine. There are 0-2 mm of rainfall expected with 73% chance of some rain and a moderate breeze of 28 kph from the south.

22
°C maximum temperature
12
°C minimum temperature
mostly cloudy with light rain
4
hours of sunshine
4
UV index (Moderate)
73
% chance of some rain
<2
mm of rainfall expected
22
°C wind chill
28
kph wind from S

Decatur weather for Friday 10th April 2026

Expect mostly cloudy with rain in Decatur, Illinois with a maximum temperature of 19°C, maximum UV of 3 (Moderate) and 2 hours of bright sunshine. There are 5-10 mm of rainfall expected with 65% chance of some rain and a gentle breeze of 18 kph from the south.