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

42°F

6°C

Humidity 82%
Wind Speed NW 14 G 20 mph
Barometer 29.51 in (999.5 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 10 Dec 4:54 am CST
Extended Forecast for

Decatur IL

Wind Advisory December 10, 05:48am until December 10, 12:00pm
Click here for hazard details and duration
Wind Advisory
  •  
    Wind Advisory December 10, 05:48am until December 10, 12:00pm

    NOW until 12:00pm Wed

    Wind Advisory

  • Overnight

    Low: 35 °F

    Slight Chance
    Showers and
    Breezy

  • Wednesday

    Wednesday: A chance of rain and snow showers before 11am, then a chance of snow showers between 11am and 2pm. Cloudy, with a temperature falling to around 30 by 5pm. Breezy, with a northwest wind 16 to 24 mph, with gusts as high as 47 mph. Chance of precipitation is 40%.

    High: 39 °F⇓

    Breezy.
    Chance
    Rain/Snow
    then Slight
    Chance Snow
    Showers

  • Wednesday Night

    Wednesday Night: 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.

    High: 18 °F

    Chance Snow

Detailed Forecast

Overnight
A 20 percent chance of showers. Cloudy, with a low around 35. Breezy, with a west wind around 20 mph, with gusts as high as 33 mph.
Wednesday
A chance of rain and snow showers before 11am, then a chance of snow showers between 11am and 2pm. Cloudy, with a temperature falling to around 30 by 5pm. Breezy, with a northwest wind 16 to 24 mph, with gusts as high as 47 mph. Chance of precipitation is 40%.
Wednesday Night
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.
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:
5:16 am CST Dec 10, 2025
Forecast Valid:
5am 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