Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Overcast
28°F
-2°C
| Humidity | 72% |
| Wind Speed | NW 10 mph |
| Barometer | 30.48 in (1032.8 mb) |
| Dewpoint | 20°F (-7°C) |
| Visibility | 10.00 mi |
| Wind Chill | 19°F (-7°C) |
| Last update | 11 Jan 1:54 pm CST |
Extended Forecast for
Decatur IL
This Afternoon

High: 35 °F
Mostly Cloudy
Tonight

Low: 25 °F
Gradual
ClearingMonday

High: 45 °F
Mostly Sunny
Monday Night

Low: 33 °F
Partly Cloudy
Tuesday

High: 54 °F
Partly Sunny
Tuesday Night

Low: 34 °F
Mostly Cloudy
Wednesday
High: 40 °F
Mostly Cloudy
then Chance
Snow and
BreezyWednesday Night

Low: 15 °F
Mostly Cloudy
Thursday

High: 30 °F
Mostly Sunny
Detailed Forecast
This Afternoon
Mostly cloudy, with a high near 35. West wind 8 to 13 mph, with gusts as high as 20 mph.
Tonight
Mostly cloudy during the early evening, then gradual clearing, with a low around 25. Southwest wind 7 to 11 mph, with gusts as high as 21 mph.
Monday
Mostly sunny, with a high near 45. West southwest wind 8 to 11 mph, with gusts as high as 22 mph.
Monday Night
Partly cloudy, with a low around 33. Southwest wind 6 to 10 mph, with gusts as high as 17 mph.
Tuesday
Partly sunny, with a high near 54. Southwest wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
Mostly cloudy, with a low around 34. West wind around 11 mph, with gusts as high as 20 mph.
Wednesday
A 40 percent chance of snow after noon. Mostly cloudy, with a high near 40. Breezy, with a northwest wind 13 to 20 mph, with gusts as high as 32 mph.
Wednesday Night
Mostly cloudy, with a low around 15.
Thursday
Mostly sunny, with a high near 30.
Thursday Night
Mostly cloudy, with a low around 24.
Friday
A chance of snow. Mostly cloudy, with a high near 37.
Friday Night
Mostly cloudy, with a low around 20.
Saturday
Mostly cloudy, with a high near 27.
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)
12:32 pm CST Jan 11, 2026
2pm CST Jan 11, 2026-6pm CST Jan 17, 2026


