Decatur weather live forecast

Today's maximum temperature in Decatur is expected to be 18°C. Select a day from the live weather forecast for Decatur, Illinois, USA for more weather parameters.

Friday
27th Feb
18

2

11

3
Saturday
28th Feb
12

-2

5

3
Sunday
1st Mar
4

-4

2

3
Monday
2nd Mar
5

-2

2

5
Tuesday
3rd Mar
5

0

1

2

5-day weather forecast updated at 04:02 on Friday 27th February 2026 GMT

More about Decatur

Decatur by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Illinois

TUI: Top deals & discounts on 2026/2027 holidays

Sale

Explore latest special offers & online deals from TUI
Free child places & £0 deposits with direct debit available
Book summer & winter sun holidays in 2026/2027

Go to TUI deal >>

View all TUI offers

TUI deal finder

Destination

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 Friday 27th February 2026

Expect clear skies in Decatur, Illinois with a maximum temperature of 18°C, maximum UV of 3 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 27 kph from the south-west.

18
°C maximum temperature
2
°C minimum temperature
clear skies
11
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
18
°C wind chill
27
kph wind from SW

Decatur weather for Saturday 28th February 2026

Expect scattered clouds in Decatur, Illinois with a maximum temperature of 12°C, maximum UV of 3 (Moderate) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 27 kph from the north-east.

12
°C maximum temperature
-2
°C minimum temperature
scattered clouds
5
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
27
kph wind from NE

Decatur weather for Sunday 1st March 2026

Expect mostly cloudy with light snow in Decatur, Illinois with a maximum temperature of 4°C, maximum UV of 3 (Moderate) and 2 hours of bright sunshine. There are 2-5 cm of snow expected with 41% chance of some snow and a moderate breeze of 24 kph from the north-east.

4
°C maximum temperature
-4
°C minimum temperature
mostly cloudy with light snow
2
hours of sunshine
3
UV index (Moderate)
41
% chance of some snow
<5
cm of snow expected
-1
°C wind chill
24
kph wind from NE

Decatur weather for Monday 2nd March 2026

Expect mostly cloudy with snow in Decatur, Illinois with a maximum temperature of 5°C, maximum UV of 5 (Moderate) and 2 hours of bright sunshine. There are 5-10 cm of snow expected with 33% chance of some snow and a moderate breeze of 24 kph from the east.

5
°C maximum temperature
-2
°C minimum temperature
mostly cloudy with snow
2
hours of sunshine
5
UV index (Moderate)
33
% chance of some snow
<10
cm of snow expected
1
°C wind chill
24
kph wind from E

Decatur weather for Tuesday 3rd March 2026

Expect mostly cloudy with rain in Decatur, Illinois with a maximum temperature of 5°C, maximum UV of 2 (Low) and 1 hour of bright sunshine. There are 5-10 mm of rainfall expected with 58% chance of some rain and a gentle breeze of 16 kph from the east.