Forecast for Decatur, IL | Forecast Periods: 14
Monday
Mar 16
2026
Decatur, IL
Updated: 1:26 PM CDT
24°F
Patchy Blowing Snow
25 mph WNW
Precipitation: 24%
Patchy blowing snow and a slight chance of snow. Mostly cloudy, with a high near 24. West northwest wind around 25 mph, with gusts as high as 38 mph. Chance of precipitation is 20%.
Hourly Forecast
Extended Forecast
Tonight
Mon, Mar 16
12°F
Chance Snow Showers then Mostly Cloudy
15 mph WNW
Precipitation: 14%
A chance of snow showers before 11pm. Mostly cloudy, with a low around 12. Wind chill values as low as -3. West northwest wind 15 to 22 mph, with gusts as high as 33 mph.
Tuesday
Tue, Mar 17
27°F
Partly Sunny
6 mph W
Precipitation: 1%
Partly sunny, with a high near 27. Wind chill values as low as -3. West wind 6 to 14 mph, with gusts as high as 22 mph.
Tuesday Night
Tue, Mar 17
24°F
Light Snow Likely
6 mph S
Precipitation: 70%
Snow likely after 7pm. Cloudy. Low around 24, with temperatures rising to around 30 overnight. South wind 6 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.
Wednesday
Wed, Mar 18
53°F
Light Snow Likely then Mostly Sunny
9 mph SSW
Precipitation: 69%
Snow likely before 7am. Mostly sunny, with a high near 53. South southwest wind 9 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New snow accumulation of less than half an inch possible.
Wednesday Night
Wed, Mar 18
36°F
Partly Cloudy
5 mph SW
Precipitation: 1%
Partly cloudy, with a low around 36. Southwest wind 5 to 8 mph.
Thursday
Thu, Mar 19
65°F
Mostly Sunny
8 mph SW
Precipitation: 4%
Mostly sunny, with a high near 65. Southwest wind around 8 mph.
Thursday Night
Thu, Mar 19
42°F
Partly Cloudy
7 mph E
Precipitation: 1%
Partly cloudy, with a low around 42.
Friday
Fri, Mar 20
71°F
Mostly Sunny
6 mph SW
Precipitation: 0%
Mostly sunny, with a high near 71.
Friday Night
Fri, Mar 20
47°F
Mostly Cloudy
10 mph SSW
Precipitation: 1%
Mostly cloudy, with a low around 47.
Saturday
Sat, Mar 21
71°F
Mostly Sunny
12 mph WSW
Precipitation: 1%
Mostly sunny, with a high near 71.
Saturday Night
Sat, Mar 21
45°F
Partly Cloudy
10 mph W
Precipitation: 2%
Partly cloudy, with a low around 45.
Sunday
Sun, Mar 22
66°F
Mostly Sunny
12 mph NNW
Precipitation: 3%
Mostly sunny, with a high near 66.
Sunday Night
Sun, Mar 22
35°F
Mostly Cloudy
14 mph N
Precipitation: 4%
Mostly cloudy, with a low around 35.