National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fair

36°F

2°C

Humidity 67%
Wind Speed W 6 mph
Barometer 29.71 in (1006.6 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill31°F (-1°C)
Last update 25 Feb 6:54 am CST
Extended Forecast for

Decatur Airport IL

  • Today

    Today: Increasing clouds, with a high near 46. West northwest wind 8 to 13 mph, with gusts as high as 21 mph.

    High: 46 °F

    Increasing
    Clouds

  • Tonight

    Tonight: A 40 percent chance of snow, mainly after 11pm. Mostly cloudy, with a low around 26. Northwest wind 5 to 8 mph becoming east northeast after midnight. Winds could gust as high as 16 mph.

    Low: 26 °F

    Chance Snow

  • Thursday

    Thursday: Mostly sunny, with a high near 47. East northeast wind 7 to 9 mph becoming west southwest in the afternoon.

    High: 47 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 30. South southwest wind 5 to 7 mph.

    Low: 30 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 62. Southwest wind 7 to 17 mph, with gusts as high as 24 mph.

    High: 62 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 35. South southwest wind 8 to 11 mph becoming north northeast after midnight. Winds could gust as high as 18 mph.

    Low: 35 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 52. Northeast wind 10 to 15 mph, with gusts as high as 22 mph.

    High: 52 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 25.

    Low: 25 °F

    Mostly Cloudy

  • Sunday

    Sunday: A chance of rain and snow after noon. Mostly cloudy, with a high near 38. Chance of precipitation is 30%.

    High: 38 °F

    Partly Sunny
    then Chance
    Rain/Snow

Detailed Forecast

Today
Increasing clouds, with a high near 46. West northwest wind 8 to 13 mph, with gusts as high as 21 mph.
Tonight
A 40 percent chance of snow, mainly after 11pm. Mostly cloudy, with a low around 26. Northwest wind 5 to 8 mph becoming east northeast after midnight. Winds could gust as high as 16 mph.
Thursday
Mostly sunny, with a high near 47. East northeast wind 7 to 9 mph becoming west southwest in the afternoon.
Thursday Night
Mostly clear, with a low around 30. South southwest wind 5 to 7 mph.
Friday
Sunny, with a high near 62. Southwest wind 7 to 17 mph, with gusts as high as 24 mph.
Friday Night
Mostly clear, with a low around 35. South southwest wind 8 to 11 mph becoming north northeast after midnight. Winds could gust as high as 18 mph.
Saturday
Mostly sunny, with a high near 52. Northeast wind 10 to 15 mph, with gusts as high as 22 mph.
Saturday Night
Mostly cloudy, with a low around 25.
Sunday
A chance of rain and snow after noon. Mostly cloudy, with a high near 38. Chance of precipitation is 30%.
Sunday Night
Rain and snow likely, mainly before midnight. Mostly cloudy, with a low around 24. Chance of precipitation is 60%.
Monday
A chance of rain and snow. Mostly cloudy, with a high near 35.
Monday Night
A chance of rain. Mostly cloudy, with a low around 24.
Tuesday
A chance of rain. Mostly cloudy, with a high near 40.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Decatur Airport IL
 39.84°N 88.85°W (Elev. 686 ft)
Last Update:
6:36 am CST Feb 25, 2026
Forecast Valid:
7am CST Feb 25, 2026-6pm CST Mar 3, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation