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.

Overcast

24°F

-4°C

Humidity 91%
Wind Speed NE 9 mph
Barometer 30.16 in (1022.1 mb)
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Wind Chill14°F (-10°C)
Last update 3 Feb 2:54 am CST
Extended Forecast for

Decatur IL

  • Overnight

    Overnight: Cloudy, with a low around 22. East northeast wind 3 to 5 mph.

    Low: 22 °F

    Cloudy

  • Tuesday

    Tuesday: Cloudy, then gradually becoming mostly sunny, with a high near 30. North wind 5 to 8 mph.

    High: 30 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 12. North wind around 6 mph.

    Low: 12 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 26. North wind around 6 mph.

    High: 26 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 9. Light and variable wind.

    Low: 9 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 33. Light southwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 17 mph.

    High: 33 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 26. South southwest wind around 10 mph becoming west after midnight. Winds could gust as high as 20 mph.

    Low: 26 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 41.

    High: 41 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 20.

    Low: 20 °F

    Partly Cloudy

Detailed Forecast

Overnight
Cloudy, with a low around 22. East northeast wind 3 to 5 mph.
Tuesday
Cloudy, then gradually becoming mostly sunny, with a high near 30. North wind 5 to 8 mph.
Tuesday Night
Mostly cloudy, with a low around 12. North wind around 6 mph.
Wednesday
Partly sunny, with a high near 26. North wind around 6 mph.
Wednesday Night
Partly cloudy, with a low around 9. Light and variable wind.
Thursday
Mostly cloudy, with a high near 33. Light southwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 17 mph.
Thursday Night
Partly cloudy, with a low around 26. South southwest wind around 10 mph becoming west after midnight. Winds could gust as high as 20 mph.
Friday
Mostly sunny, with a high near 41.
Friday Night
Partly cloudy, with a low around 20.
Saturday
Mostly sunny, with a high near 34.
Saturday Night
Partly cloudy, with a low around 21.
Sunday
Mostly sunny, with a high near 34.
Sunday Night
Partly cloudy, with a low around 19.
Monday
Mostly sunny, with a high near 36.
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:
3:16 am CST Feb 3, 2026
Forecast Valid:
3am CST Feb 3, 2026-6pm CST Feb 9, 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