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

26°F

-3°C

Humidity 71%
Wind Speed NW 14 mph
Barometer 30.35 in (1028.6 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Wind Chill14°F (-10°C)
Last update 27 Nov 9:54 pm CST
Extended Forecast for

Decatur IL

Winter Storm Watch November 29, 12:00am until November 30, 06:00am
Click here for hazard details and duration
Winter Storm Watch

  • Tonight

    Tonight: Clear, with a low around 20. West northwest wind 8 to 10 mph, with gusts as high as 18 mph.

    Low: 20 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 33. Northwest wind 5 to 7 mph becoming calm in the afternoon.

    High: 33 °F

    Sunny

  • Friday Night

    Friday Night: Snow, mainly after 3am. Low around 24. Light south wind becoming southeast 5 to 10 mph after midnight. Winds could gust as high as 17 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    Low: 24 °F

    Mostly Cloudy
    then Snow

  • Saturday

    Saturday: Snow. The snow could be heavy at times. High near 33. South southeast wind 13 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 7 inches possible.

    High: 33 °F

    Heavy Snow

  • Saturday Night

    Saturday Night: Snow, mainly before midnight. Low around 25. South southeast wind 14 to 18 mph becoming west northwest after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 2 inches possible.

    Low: 25 °F

    Snow then
    Chance Snow

  • Sunday

    Sunday: Mostly cloudy, with a high near 28. West northwest wind 10 to 18 mph, with gusts as high as 24 mph.

    High: 28 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 10. Northwest wind 5 to 9 mph becoming light north after midnight.

    Low: 10 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 23.

    High: 23 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 15.

    Low: 15 °F

    Chance Snow
    then Mostly
    Cloudy

Detailed Forecast

Tonight
Clear, with a low around 20. West northwest wind 8 to 10 mph, with gusts as high as 18 mph.
Friday
Sunny, with a high near 33. Northwest wind 5 to 7 mph becoming calm in the afternoon.
Friday Night
Snow, mainly after 3am. Low around 24. Light south wind becoming southeast 5 to 10 mph after midnight. Winds could gust as high as 17 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Saturday
Snow. The snow could be heavy at times. High near 33. South southeast wind 13 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 7 inches possible.
Saturday Night
Snow, mainly before midnight. Low around 25. South southeast wind 14 to 18 mph becoming west northwest after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 2 inches possible.
Sunday
Mostly cloudy, with a high near 28. West northwest wind 10 to 18 mph, with gusts as high as 24 mph.
Sunday Night
Mostly cloudy, with a low around 10. Northwest wind 5 to 9 mph becoming light north after midnight.
Monday
Mostly cloudy, with a high near 23.
Monday Night
A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 15.
Tuesday
Partly sunny, with a high near 25.
Tuesday Night
Mostly cloudy, with a low around 12.
Wednesday
Partly sunny, with a high near 32.
Wednesday Night
Mostly cloudy, with a low around 18.
Thursday
Mostly cloudy, with a high near 30.
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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 Nov 27, 2025
Forecast Valid:
11pm CST Nov 27, 2025-6pm CST Dec 4, 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