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

26°F

-3°C

Humidity 92%
Wind Speed E 8 mph
Barometer 29.97 in (1015.5 mb)
Dewpoint 24°F (-4°C)
Visibility 5.00 mi
Wind Chill18°F (-8°C)
Last update 6 Dec 7:54 pm CST
Extended Forecast for

Decatur Airport IL

Winter Weather Advisory December 6, 09:00pm until December 7, 06:00am
Click here for hazard details and duration
Winter Weather Advisory

  • Tonight

    Tonight: A chance of freezing rain before 3am, then a chance of snow and freezing rain between 3am and 5am, then a slight chance of freezing rain after 5am. Patchy fog after 1am. Otherwise, cloudy, with a temperature rising to around 33 by 3am. South southeast wind around 8 mph. Chance of precipitation is 40%.

    Low: 26 °F⇑

    Chance Wintry
    Mix and
    Patchy Fog

  • Sunday

    Sunday: A chance of rain and snow before 8am, then a chance of rain between 8am and noon. Patchy fog before 11am. Otherwise, cloudy, with a temperature rising to near 33 by 9am, then falling to around 26 during the remainder of the day. South wind 7 to 15 mph becoming north in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 30%.

    High: 33 °F⇓

    Chance
    Rain/Snow and
    Patchy Fog
    then Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 12. Wind chill values between 4 and 9. North northeast wind 6 to 13 mph, with gusts as high as 17 mph.

    Low: 12 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 26. Wind chill values between 5 and 15. North northeast wind around 6 mph becoming south in the afternoon.

    High: 26 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a temperature falling to near 19 by 8pm, then rising to around 27 during the remainder of the night. South wind 6 to 15 mph, with gusts as high as 23 mph.

    Low: 19 °F⇑

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 41. South southwest wind around 15 mph, with gusts as high as 23 mph.

    High: 41 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 40 percent chance of rain after midnight. Mostly cloudy, with a low around 34. Southwest wind 14 to 18 mph, with gusts as high as 28 mph.

    Low: 34 °F

    Mostly Cloudy
    then Chance
    Rain

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 39.

    High: 39 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A 30 percent chance of snow after midnight. Mostly cloudy, with a low around 20.

    Low: 20 °F

    Mostly Cloudy
    then Chance
    Snow

Detailed Forecast

Tonight
A chance of freezing rain before 3am, then a chance of snow and freezing rain between 3am and 5am, then a slight chance of freezing rain after 5am. Patchy fog after 1am. Otherwise, cloudy, with a temperature rising to around 33 by 3am. South southeast wind around 8 mph. Chance of precipitation is 40%.
Sunday
A chance of rain and snow before 8am, then a chance of rain between 8am and noon. Patchy fog before 11am. Otherwise, cloudy, with a temperature rising to near 33 by 9am, then falling to around 26 during the remainder of the day. South wind 7 to 15 mph becoming north in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 30%.
Sunday Night
Mostly cloudy, with a low around 12. Wind chill values between 4 and 9. North northeast wind 6 to 13 mph, with gusts as high as 17 mph.
Monday
Mostly sunny, with a high near 26. Wind chill values between 5 and 15. North northeast wind around 6 mph becoming south in the afternoon.
Monday Night
Mostly cloudy, with a temperature falling to near 19 by 8pm, then rising to around 27 during the remainder of the night. South wind 6 to 15 mph, with gusts as high as 23 mph.
Tuesday
Partly sunny, with a high near 41. South southwest wind around 15 mph, with gusts as high as 23 mph.
Tuesday Night
A 40 percent chance of rain after midnight. Mostly cloudy, with a low around 34. Southwest wind 14 to 18 mph, with gusts as high as 28 mph.
Wednesday
Mostly cloudy, with a high near 39.
Wednesday Night
A 30 percent chance of snow after midnight. Mostly cloudy, with a low around 20.
Thursday
A 30 percent chance of snow before noon. Mostly cloudy, with a high near 31.
Thursday Night
Mostly cloudy, with a low around 13.
Friday
Partly sunny, with a high near 20.
Friday Night
Mostly cloudy, with a low around 3.
Saturday
Mostly sunny, with a high near 15.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Decatur Airport IL
 39.84°N 88.88°W (Elev. 650 ft)
Last Update:
6:36 pm CST Dec 6, 2025
Forecast Valid:
8pm CST Dec 6, 2025-6pm CST Dec 13, 2025
 
Forecast Discussion
 
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Additional Resources

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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