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.

Fog/Mist

31°F

-1°C

Humidity 92%
Wind Speed SE 3 mph
Barometer 29.94 in (1014.6 mb)
Dewpoint 29°F (-2°C)
Visibility 5.00 mi
Last update 7 Dec 12:54 am CST
Extended Forecast for

3 Miles SW Dewitt IL

Winter Weather Advisory until December 7, 06:00am
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory until December 7, 06:00am

    NOW until 6:00am Sun

    Winter Weather Advisory

  • Overnight

    Low: 26 °F

    Chance
    Rain/Freezing
    Rain and
    Patchy Fog

  • Sunday

    Sunday: A slight chance of rain, mixing with snow after 8am, then gradually ending. Areas of fog before noon. Otherwise, cloudy, with a temperature falling to around 26 by 5pm. South wind 6 to 15 mph becoming north in the morning. Winds could gust as high as 25 mph. Chance of precipitation is 20%.

    High: 32 °F⇓

    Slight Chance
    Rain/Snow and
    Areas Fog
    then Mostly
    Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 15. North wind 7 to 13 mph, with gusts as high as 20 mph.

    Low: 15 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, then gradually becoming sunny, with a high near 27. Northeast wind around 6 mph becoming south in the afternoon.

    High: 27 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 16. South wind 6 to 11 mph increasing to 13 to 18 mph after midnight. Winds could gust as high as 25 mph.

    Low: 16 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 42. Southwest wind 15 to 18 mph, with gusts as high as 25 mph.

    High: 42 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of rain after midnight. Mostly cloudy, with a low around 36. Breezy, with a south southwest wind 15 to 22 mph, with gusts as high as 30 mph.

    Low: 36 °F

    Breezy.
    Mostly Cloudy
    then Chance
    Rain

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 41. Breezy.

    High: 41 °F

    Mostly Cloudy
    and Breezy

Detailed Forecast

Overnight
A chance of freezing rain before 3am, then a chance of rain. Patchy fog. Otherwise, cloudy, with a low around 26. South wind around 8 mph. Chance of precipitation is 30%.
Sunday
A slight chance of rain, mixing with snow after 8am, then gradually ending. Areas of fog before noon. Otherwise, cloudy, with a temperature falling to around 26 by 5pm. South wind 6 to 15 mph becoming north in the morning. Winds could gust as high as 25 mph. Chance of precipitation is 20%.
Sunday Night
Mostly cloudy, with a low around 15. North wind 7 to 13 mph, with gusts as high as 20 mph.
Monday
Mostly cloudy, then gradually becoming sunny, with a high near 27. Northeast wind around 6 mph becoming south in the afternoon.
Monday Night
Mostly cloudy, with a low around 16. South wind 6 to 11 mph increasing to 13 to 18 mph after midnight. Winds could gust as high as 25 mph.
Tuesday
Partly sunny, with a high near 42. Southwest wind 15 to 18 mph, with gusts as high as 25 mph.
Tuesday Night
A 30 percent chance of rain after midnight. Mostly cloudy, with a low around 36. Breezy, with a south southwest wind 15 to 22 mph, with gusts as high as 30 mph.
Wednesday
Mostly cloudy, with a high near 41. Breezy.
Wednesday Night
Mostly cloudy, with a low around 22.
Thursday
A 30 percent chance of snow. Mostly cloudy, with a high near 30.
Thursday Night
Mostly cloudy, with a low around 10.
Friday
Partly sunny, with a high near 19.
Friday Night
Mostly cloudy, with a low around 1.
Saturday
Partly sunny, with a high near 13.
Basemap Options
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SW Dewitt IL
 40.17°N 88.78°W (Elev. 699 ft)
Last Update:
1:21 am CST Dec 7, 2025
Forecast Valid:
1am CST Dec 7, 2025-6pm CST Dec 13, 2025
 
Forecast Discussion
 
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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