Decatur weather live forecast

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

Thursday
9th Apr
25

13

6

6
Friday
10th Apr
16

10

1

3
Saturday
11th Apr
19

7

9

5
Sunday
12th Apr
26

15

7

5
Monday
13th Apr
27

19

3

3

5-day weather forecast updated at 04:01 on Thursday 9th 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 Thursday 9th April 2026

Expect broken clouds in Decatur, Illinois with a maximum temperature of 25°C, maximum UV of 6 (High) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 24 kph from the south-west.

25
°C maximum temperature
13
°C minimum temperature
broken clouds
6
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
25
°C wind chill
24
kph wind from SW

Decatur weather for Friday 10th April 2026

Expect mostly cloudy with light rain in Decatur, Illinois with a maximum temperature of 16°C, maximum UV of 3 (Moderate) and 1 hour of bright sunshine. There are 2-5 mm of rainfall expected with 87% chance of some rain and a moderate breeze of 27 kph from the south-west.

16
°C maximum temperature
10
°C minimum temperature
mostly cloudy with light rain
1
hour of sunshine
3
UV index (Moderate)
87
% chance of some rain
<5
mm of rainfall expected
0
no heat & humidity
27
kph wind from SW

Decatur weather for Saturday 11th April 2026

Expect scattered clouds in Decatur, Illinois with a maximum temperature of 19°C, maximum UV of 5 (Moderate) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 20 kph from the south-east.

19
°C maximum temperature
7
°C minimum temperature
scattered clouds
9
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
20
kph wind from SE

Decatur weather for Sunday 12th April 2026

Expect broken clouds in Decatur, Illinois with a maximum temperature of 26°C, maximum UV of 5 (Moderate) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a fresh breeze of 37 kph from the south.

26
°C maximum temperature
15
°C minimum temperature
broken clouds
7
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
L
low heat & humidity
37
kph wind from S

Decatur weather for Monday 13th April 2026

Expect isolated thunderstorms in Decatur, Illinois with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 3 (Moderate) and 3 hours of bright sunshine. There are 2-5 mm of rainfall expected with 61% chance of some rain and a fresh breeze of 31 kph from the south.