Decatur weather live forecast

Today's maximum temperature in Decatur is expected to be -2°C. Select a day from the live weather forecast for Decatur, Illinois, USA for more weather parameters.

Saturday
7th Feb
-2

-8

9

3
Sunday
8th Feb
1

-6

8

3
Monday
9th Feb
7

-4

11

3
Tuesday
10th Feb
14

2

8

2
Wednesday
11th Feb
6

0

6

2

5-day weather forecast updated at 04:02 on Saturday 7th 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 Saturday 7th February 2026

Expect scattered clouds in Decatur, Illinois with a maximum temperature of -2°C, maximum UV of 3 (Moderate) and 9 hours of bright sunshine. There are 0 cm of snow expected and a gentle breeze of 19 kph from the south-east.

-2
°C maximum temperature
-8
°C minimum temperature
scattered clouds
9
hours of sunshine
3
UV index (Moderate)
0
cm of snow expected
-8
°C wind chill
19
kph wind from SE

Decatur weather for Sunday 8th February 2026

Expect scattered clouds in Decatur, Illinois with a maximum temperature of 1°C, maximum UV of 3 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 22 kph from the south-east.

1
°C maximum temperature
-6
°C minimum temperature
scattered clouds
8
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
-5
°C wind chill
22
kph wind from SE

Decatur weather for Monday 9th 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 19 kph from the south.

7
°C maximum temperature
-4
°C minimum temperature
clear skies
11
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
3
°C wind chill
19
kph wind from S

Decatur weather for Tuesday 10th February 2026

Expect sunshine and showers in Decatur, Illinois with a maximum temperature of 14°C, maximum UV of 2 (Low) and 8 hours of bright sunshine. There are 0-2 mm of rainfall expected with 28% chance of some rain and a gentle breeze of 19 kph from the south-west.

14
°C maximum temperature
2
°C minimum temperature
sunshine and showers
8
hours of sunshine
2
UV index (Low)
28
% chance of some rain
<2
mm of rainfall expected
14
°C wind chill
19
kph wind from SW

Decatur weather for Wednesday 11th February 2026

Expect sunshine and showers in Decatur, Illinois with a maximum temperature of 6°C, maximum UV of 2 (Low) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 21% chance of some rain and a gentle breeze of 19 kph from the north.