Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fog/Mist

24°F

-4°C

Humidity 84%
Wind Speed E 8 mph
Barometer 30.36 in (1029.0 mb)
Dewpoint 20°F (-7°C)
Visibility 6.00 mi
Wind Chill15°F (-9°C)
Last update 1 Dec 9:54 am CST
Extended Forecast for

Decatur IL

Winter Weather Advisory December 1, 12:00pm until December 2, 06:00am
Click here for hazard details and duration
Winter Weather Advisory
  • Today

    Today: Snow, mainly after 2pm.  High near 28. Southeast wind 3 to 6 mph.  Chance of precipitation is 100%. Total daytime snow accumulation of 1 to 3 inches possible.

    High: 28 °F

    Cloudy then
    Snow

  • Tonight

    Tonight: Snow, mainly before midnight.  Low around 17. Calm wind becoming west northwest 5 to 7 mph after midnight.  Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.

    Low: 17 °F

    Snow then
    Chance Snow

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 25. Northwest wind around 6 mph becoming southwest in the afternoon.

    High: 25 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 17. South wind 5 to 9 mph, with gusts as high as 15 mph.

    Low: 17 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 33. South southwest wind 6 to 10 mph, with gusts as high as 16 mph.

    High: 33 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 6. West wind 6 to 9 mph becoming north northwest after midnight. Winds could gust as high as 15 mph.

    Low: 6 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 15. North northwest wind 3 to 8 mph.

    High: 15 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 1.

    Low: 1 °F

    Mostly Cloudy

  • Friday

    Friday: A 30 percent chance of snow after noon.  Mostly cloudy, with a high near 29.

    High: 29 °F

    Partly Sunny
    then Chance
    Snow

Detailed Forecast

Today
Snow, mainly after 2pm. High near 28. Southeast wind 3 to 6 mph. Chance of precipitation is 100%. Total daytime snow accumulation of 1 to 3 inches possible.
Tonight
Snow, mainly before midnight. Low around 17. Calm wind becoming west northwest 5 to 7 mph after midnight. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.
Tuesday
Mostly cloudy, with a high near 25. Northwest wind around 6 mph becoming southwest in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 17. South wind 5 to 9 mph, with gusts as high as 15 mph.
Wednesday
Mostly cloudy, with a high near 33. South southwest wind 6 to 10 mph, with gusts as high as 16 mph.
Wednesday Night
Mostly cloudy, with a low around 6. West wind 6 to 9 mph becoming north northwest after midnight. Winds could gust as high as 15 mph.
Thursday
Mostly sunny, with a high near 15. North northwest wind 3 to 8 mph.
Thursday Night
Mostly cloudy, with a low around 1.
Friday
A 30 percent chance of snow after noon. Mostly cloudy, with a high near 29.
Friday Night
Mostly cloudy, with a low around 21.
Saturday
Mostly cloudy, with a high near 32.
Saturday Night
Mostly cloudy, with a low around 21.
Sunday
Mostly cloudy, with a high near 31.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Decatur IL
 39.84°N 88.94°W (Elev. 692 ft)
10:12 am CST Dec 1, 2025
10am CST Dec 1, 2025-6pm CST Dec 7, 2025
 
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