Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Mostly Cloudy
29°F
-2°C
| Humidity | 66% |
| Wind Speed | SW 9 mph |
| Barometer | 29.86 in (1012.0 mb) |
| Dewpoint | 19°F (-7°C) |
| Visibility | 10.00 mi |
| Wind Chill | 21°F (-6°C) |
| Last update | 5 Dec 9:54 pm CST |
Extended Forecast for
Decatur IL
Tonight

Low: 24 °F
Mostly Cloudy
Saturday

High: 32 °F
Mostly Cloudy
Saturday Night
Low: 27 °F
Slight Chance
Snow then
Snow LikelySunday
High: 33 °F
Rain/Snow
Likely then
Mostly CloudySunday Night

Low: 10 °F
Mostly Cloudy
Monday

High: 24 °F
Mostly Sunny
Monday Night

Low: 16 °F
Partly Cloudy
Tuesday

High: 38 °F
Partly Sunny
Tuesday Night
Low: 32 °F
Mostly Cloudy
then Chance
Rain
Detailed Forecast
Tonight
Mostly cloudy, with a low around 24. West southwest wind 6 to 9 mph, with gusts as high as 16 mph.
Saturday
Mostly cloudy, with a high near 32. West northwest wind around 6 mph becoming light and variable in the afternoon.
Saturday Night
Snow likely, mainly after midnight. Mostly cloudy, with a low around 27. Southeast wind 3 to 7 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Sunday
Rain and snow likely before noon. Mostly cloudy, with a high near 33. South southeast wind 7 to 11 mph becoming north in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Sunday Night
Mostly cloudy, with a low around 10. North wind 5 to 10 mph, with gusts as high as 16 mph.
Monday
Mostly sunny, with a high near 24. North northeast wind around 5 mph becoming south southeast in the afternoon.
Monday Night
Partly cloudy, with a low around 16. South wind 5 to 14 mph, with gusts as high as 21 mph.
Tuesday
Partly sunny, with a high near 38.
Tuesday Night
A 30 percent chance of rain after midnight. Mostly cloudy, with a low around 32.
Wednesday
A 40 percent chance of rain. Mostly cloudy, with a high near 40.
Wednesday Night
Mostly cloudy, with a low around 21.
Thursday
Mostly cloudy, with a high near 33.
Thursday Night
Mostly cloudy, with a low around 15.
Friday
Partly sunny, with a high near 23.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Decatur IL
39.84°N 88.94°W (Elev. 692 ft)
39.84°N 88.94°W (Elev. 692 ft)
8:36 pm CST Dec 5, 2025
11pm CST Dec 5, 2025-6pm CST Dec 12, 2025


