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 with Haze and Breezy

34°F

1°C

Humidity 82%
Wind Speed W 23 G 32 mph
Barometer 29.68 in (1005.5 mb)
Dewpoint 29°F (-2°C)
Visibility 6.00 mi
Wind Chill22°F (-6°C)
Last update 10 Dec 10:54 am CST
Extended Forecast for

Decatur IL

Wind Advisory December 10, 11:56am until December 10, 12:00pm
Click here for hazard details and duration
Wind Advisory
  •  
    Wind Advisory December 10, 11:56am until December 10, 12:00pm

    NOW until 12:00pm Wed

    Wind Advisory

  • Today

    High: 40 °F

    Chance Snow
    and Breezy

  • Tonight

    Tonight: Cloudy, with a low around 21. Northwest wind 7 to 14 mph, with gusts as high as 20 mph.

    Low: 21 °F

    Cloudy

  • Thursday

    Thursday: A 30 percent chance of snow after 3pm. Mostly cloudy, with a high near 29. Northwest wind around 7 mph becoming south in the afternoon.

    High: 29 °F

    Partly Sunny
    then Chance
    Snow

  • Thursday Night

    Thursday Night: Snow, mainly before midnight. Low around 26. South southeast wind 6 to 8 mph becoming east northeast after midnight. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    Low: 26 °F

    Snow then
    Chance Snow

  • Friday

    Friday: Mostly cloudy, with a high near 32. Northeast wind 8 to 13 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph.

    High: 32 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 11. West northwest wind 8 to 11 mph, with gusts as high as 16 mph.

    Low: 11 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 40 percent chance of snow. Mostly cloudy, with a high near 18. Northwest wind around 7 mph.

    High: 18 °F

    Chance Snow

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around -3.

    Low: -3 °F

    Partly Cloudy

Detailed Forecast

Today
A 30 percent chance of snow, mainly before noon. Cloudy, with a high near 40. Breezy, with a northwest wind 16 to 23 mph, with gusts as high as 39 mph.
Tonight
Cloudy, with a low around 21. Northwest wind 7 to 14 mph, with gusts as high as 20 mph.
Thursday
A 30 percent chance of snow after 3pm. Mostly cloudy, with a high near 29. Northwest wind around 7 mph becoming south in the afternoon.
Thursday Night
Snow, mainly before midnight. Low around 26. South southeast wind 6 to 8 mph becoming east northeast after midnight. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Friday
Mostly cloudy, with a high near 32. Northeast wind 8 to 13 mph becoming northwest in the afternoon. Winds could gust as high as 20 mph.
Friday Night
Mostly cloudy, with a low around 11. West northwest wind 8 to 11 mph, with gusts as high as 16 mph.
Saturday
A 40 percent chance of snow. Mostly cloudy, with a high near 18. Northwest wind around 7 mph.
Saturday Night
Partly cloudy, with a low around -3.
Sunday
Sunny and cold, with a high near 9.
Sunday Night
Mostly clear, with a low around -1.
Monday
Mostly sunny, with a high near 27.
Monday Night
Mostly cloudy, with a low around 19.
Tuesday
Partly sunny, with a high near 38.
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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:
11:36 am CST Dec 10, 2025
Forecast Valid:
11am CST Dec 10, 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