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 and Breezy

38°F

3°C

Humidity 83%
Wind Speed S 22 G 31 mph
Barometer 29.52 in (1000.1 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 9 Dec 10:54 pm CST
Extended Forecast for

Decatur IL

Wind Advisory December 10, 12:00am until December 10, 12:00pm
Click here for hazard details and duration
Wind Advisory

  • Tonight

    Tonight: A 50 percent chance of rain, mainly before 3am. Mostly cloudy, with a low around 35. Breezy, with a southwest wind 18 to 21 mph, with gusts as high as 34 mph.

    Low: 35 °F

    Chance Rain
    and Breezy

  • Wednesday

    Wednesday: A chance of rain before 8am, then a chance of rain and snow between 8am and noon, then a slight chance of snow after noon. Mostly cloudy, with a temperature falling to around 30 by 5pm. Breezy, with a northwest wind 16 to 24 mph, with gusts as high as 45 mph. Chance of precipitation is 50%.

    High: 38 °F⇓

    Breezy.
    Chance
    Rain/Snow
    then Slight
    Chance Snow

  • Wednesday Night

    Wednesday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 20. Northwest wind 7 to 14 mph, with gusts as high as 20 mph.

    Low: 20 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Thursday

    Thursday: A 30 percent chance of snow after noon. Mostly cloudy, with a high near 31. West northwest wind around 6 mph becoming south in the afternoon.

    High: 31 °F

    Mostly Cloudy
    then Chance
    Snow

  • Thursday Night

    Thursday Night: A 40 percent chance of snow. Cloudy, with a low around 27. South southeast wind 6 to 8 mph becoming east after midnight.

    Low: 27 °F

    Chance Snow

  • Friday

    Friday: A 30 percent chance of snow before noon. Mostly cloudy, with a high near 34. East wind 8 to 10 mph becoming northwest in the afternoon. Winds could gust as high as 18 mph.

    High: 34 °F

    Chance Snow
    then Mostly
    Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 15. Northwest wind around 10 mph, with gusts as high as 15 mph.

    Low: 15 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 30 percent chance of snow after noon. Mostly cloudy, with a high near 21.

    High: 21 °F

    Mostly Cloudy
    then Chance
    Snow

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 0.

    Low: 0 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A 50 percent chance of rain, mainly before 3am. Mostly cloudy, with a low around 35. Breezy, with a southwest wind 18 to 21 mph, with gusts as high as 34 mph.
Wednesday
A chance of rain before 8am, then a chance of rain and snow between 8am and noon, then a slight chance of snow after noon. Mostly cloudy, with a temperature falling to around 30 by 5pm. Breezy, with a northwest wind 16 to 24 mph, with gusts as high as 45 mph. Chance of precipitation is 50%.
Wednesday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 20. Northwest wind 7 to 14 mph, with gusts as high as 20 mph.
Thursday
A 30 percent chance of snow after noon. Mostly cloudy, with a high near 31. West northwest wind around 6 mph becoming south in the afternoon.
Thursday Night
A 40 percent chance of snow. Cloudy, with a low around 27. South southeast wind 6 to 8 mph becoming east after midnight.
Friday
A 30 percent chance of snow before noon. Mostly cloudy, with a high near 34. East wind 8 to 10 mph becoming northwest in the afternoon. Winds could gust as high as 18 mph.
Friday Night
Mostly cloudy, with a low around 15. Northwest wind around 10 mph, with gusts as high as 15 mph.
Saturday
A 30 percent chance of snow after noon. Mostly cloudy, with a high near 21.
Saturday Night
Mostly cloudy, with a low around 0.
Sunday
Sunny, with a high near 12.
Sunday Night
Partly cloudy, with a low around 3.
Monday
Partly sunny, with a high near 28.
Monday Night
Mostly cloudy, with a low around 17.
Tuesday
Mostly sunny, with a high near 33.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Decatur IL
 39.84°N 88.94°W (Elev. 692 ft)
Last Update:
9:36 pm CST Dec 9, 2025
Forecast Valid:
10pm CST Dec 9, 2025-6pm CST Dec 16, 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