Hazardous Weather Conditions
Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Fair
18°F
-8°C
| Humidity | 54% |
| Wind Speed | N 6 mph |
| Barometer | 30.32 in (1028.0 mb) |
| Dewpoint | 4°F (-16°C) |
| Visibility | 10.00 mi |
| Wind Chill | 10°F (-12°C) |
| Last update | 4 Dec 2:54 pm CST |
Extended Forecast for
Decatur Airport IL
This Afternoon

High: 19 °F
Sunny
Tonight

Low: 1 °F
Patchy
Freezing FogFriday
High: 29 °F
Patchy
Freezing Fog
then SunnyFriday Night

Low: 23 °F
Increasing
CloudsSaturday

High: 32 °F
Mostly Cloudy
Saturday Night
Low: 22 °F
Mostly Cloudy
then Chance
SnowSunday
High: 29 °F
Chance Snow
then Mostly
CloudySunday Night

Low: 7 °F
Mostly Cloudy
Monday

High: 24 °F
Mostly Sunny
Detailed Forecast
This Afternoon
Sunny, with a high near 19. Wind chill values between 4 and 9. North northeast wind around 6 mph.
Tonight
Patchy freezing fog after 9pm. Partly cloudy, with a low around 1. Wind chill values between -1 and -6. Northeast wind around 5 mph becoming calm.
Friday
Patchy freezing fog before 9am. Sunny, with a high near 29. Wind chill values between -1 and 9. South wind 6 to 10 mph, with gusts as high as 16 mph.
Friday Night
Increasing clouds, with a low around 23. South wind 7 to 10 mph becoming west after midnight.
Saturday
Mostly cloudy, with a high near 32. West wind 5 to 7 mph becoming northeast in the afternoon.
Saturday Night
A 40 percent chance of snow after midnight. Mostly cloudy, with a low around 22. East wind 5 to 8 mph.
Sunday
A 50 percent chance of snow before noon. Mostly cloudy, with a high near 29. East wind 8 to 13 mph becoming north in the afternoon. Winds could gust as high as 18 mph.
Sunday Night
Mostly cloudy, with a low around 7.
Monday
Mostly sunny, with a high near 24.
Monday Night
Mostly cloudy, with a low around 16.
Tuesday
Partly sunny, with a high near 35.
Tuesday Night
Mostly cloudy, with a low around 26.
Wednesday
A chance of rain. Mostly cloudy, with a high near 36.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
ABOUT THIS FORECAST
Point Forecast:
Decatur Airport IL
39.84°N 88.88°W (Elev. 650 ft)
39.84°N 88.88°W (Elev. 650 ft)
3:16 pm CST Dec 4, 2025
3pm CST Dec 4, 2025-6pm CST Dec 10, 2025



