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

17°F

-8°C

Humidity 74%
Wind Speed N 14 mph
Barometer 30.31 in (1027.5 mb)
Dewpoint 10°F (-12°C)
Visibility 10.00 mi
Wind Chill3°F (-16°C)
Last update 4 Dec 3:54 am CST
Extended Forecast for

Decatur IL

  • Today

    Today: Sunny, with a high near 17. Wind chill values between -8 and 2. North northeast wind 5 to 9 mph, with gusts as high as 15 mph.

    High: 17 °F

    Sunny

  • Tonight

    Tonight: Patchy freezing fog between 2am and 4am. Partly cloudy, with a low around 1. Wind chill values between -2 and -7. Northeast wind around 5 mph becoming light and variable.

    Low: 1 °F

    Patchy
    Freezing Fog

  • Friday

    Friday: Mostly sunny, with a high near 31. Wind chill values between 1 and 11. South wind 5 to 8 mph.

    High: 31 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 22. South wind 6 to 8 mph becoming west after midnight.

    Low: 22 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 31. West wind around 6 mph becoming north northeast in the afternoon.

    High: 31 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A 30 percent chance of snow after midnight. Cloudy, with a low around 21. Northeast wind 5 to 7 mph.

    Low: 21 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday

    Sunday: Mostly cloudy, with a high near 28. North wind 7 to 9 mph, with gusts as high as 15 mph.

    High: 28 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 9.

    Low: 9 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 24.

    High: 24 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 17. Wind chill values between -8 and 2. North northeast wind 5 to 9 mph, with gusts as high as 15 mph.
Tonight
Patchy freezing fog between 2am and 4am. Partly cloudy, with a low around 1. Wind chill values between -2 and -7. Northeast wind around 5 mph becoming light and variable.
Friday
Mostly sunny, with a high near 31. Wind chill values between 1 and 11. South wind 5 to 8 mph.
Friday Night
Mostly cloudy, with a low around 22. South wind 6 to 8 mph becoming west after midnight.
Saturday
Mostly cloudy, with a high near 31. West wind around 6 mph becoming north northeast in the afternoon.
Saturday Night
A 30 percent chance of snow after midnight. Cloudy, with a low around 21. Northeast wind 5 to 7 mph.
Sunday
Mostly cloudy, with a high near 28. North wind 7 to 9 mph, with gusts as high as 15 mph.
Sunday Night
Mostly cloudy, with a low around 9.
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 37.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Decatur IL
 39.84°N 88.94°W (Elev. 692 ft)
Last Update:
3:51 am CST Dec 4, 2025
Forecast Valid:
4am CST Dec 4, 2025-6pm CST Dec 10, 2025
 
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