Decatur weather live forecast

Today's maximum temperature in Decatur is expected to be -1°C. Select a day from the live weather forecast for Decatur, Illinois, USA for more weather parameters.

Monday
23rd Feb
-1

-9

10

3
Tuesday
24th Feb
5

-7

2

2
Wednesday
25th Feb
7

-3

9

3
Thursday
26th Feb
6

-3

2

2
Friday
27th Feb
12

-4

11

3

5-day weather forecast updated at 04:02 on Monday 23rd 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 23rd February 2026

Expect scattered clouds in Decatur, Illinois with a maximum temperature of -1°C, maximum UV of 3 (Moderate) and 10 hours of bright sunshine. There are 0 cm of snow expected and a moderate breeze of 26 kph from the north-west.

-1
°C maximum temperature
-9
°C minimum temperature
scattered clouds
10
hours of sunshine
3
UV index (Moderate)
0
cm of snow expected
-8
°C wind chill
26
kph wind from NW

Decatur weather for Tuesday 24th February 2026

Expect broken clouds in Decatur, Illinois with a maximum temperature of 5°C, maximum UV of 2 (Low) and 2 hours of bright sunshine. There are 0 mm of rainfall expected and a fresh breeze of 36 kph from the south.

5
°C maximum temperature
-7
°C minimum temperature
broken clouds
2
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
-1
°C wind chill
36
kph wind from S

Decatur weather for Wednesday 25th February 2026

Expect broken clouds in Decatur, Illinois with a maximum temperature of 7°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 north-west.

7
°C maximum temperature
-3
°C minimum temperature
broken clouds
9
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
3
°C wind chill
21
kph wind from NW

Decatur weather for Thursday 26th February 2026

Expect cloudy with sleet or snow in Decatur, Illinois with a maximum temperature of 6°C, maximum UV of 2 (Low) and 2 hours of bright sunshine. There are 5-10 mm of sleet/snow expected with 67% chance of some sleet or snow and a gentle breeze of 17 kph from the north-west.

6
°C maximum temperature
-3
°C minimum temperature
cloudy with sleet or snow
2
hours of sunshine
2
UV index (Low)
67
% chance of some sleet or snow
<10
mm of sleet/snow expected
2
°C wind chill
17
kph wind from NW

Decatur weather for Friday 27th February 2026

Expect scattered clouds in Decatur, Illinois with a maximum temperature of 12°C, maximum UV of 3 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 23 kph from the south.