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

37°F

3°C

Humidity 41%
Wind Speed NW 17 G 25 mph
Barometer 30.32 in (1027.4 mb)
Dewpoint 15°F (-9°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 27 Nov 2:54 pm CST
Extended Forecast for

2 Miles E Harristown IL

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

  • Thanksgiving Day

    Thanksgiving Day: Sunny, with a high near 38. West northwest wind 11 to 15 mph, with gusts as high as 23 mph.

    High: 38 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 20. West northwest wind 7 to 10 mph, with gusts as high as 17 mph.

    Low: 20 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 34. West northwest wind 5 to 7 mph becoming calm in the afternoon.

    High: 34 °F

    Sunny

  • Friday Night

    Friday Night: Snow, mainly after 3am. Low around 24. Light south southeast wind becoming southeast 6 to 11 mph after midnight. Winds could gust as high as 17 mph. Chance of precipitation is 80%. New snow accumulation of around an 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 18 mph, with gusts as high as 28 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. Breezy, with a south southeast wind 15 to 20 mph becoming west northwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 100%.

    Low: 25 °F

    Snow then
    Chance Snow
    and Breezy

  • Sunday

    Sunday: Mostly cloudy, with a high near 28. Blustery, with a west northwest wind 11 to 20 mph, with gusts as high as 25 mph.

    High: 28 °F

    Mostly Cloudy
    and Blustery
    then Partly
    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 9.

    Low: 9 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 22.

    High: 22 °F

    Mostly Cloudy

Detailed Forecast

Thanksgiving Day
Sunny, with a high near 38. West northwest wind 11 to 15 mph, with gusts as high as 23 mph.
Tonight
Clear, with a low around 20. West northwest wind 7 to 10 mph, with gusts as high as 17 mph.
Friday
Sunny, with a high near 34. West northwest wind 5 to 7 mph becoming calm in the afternoon.
Friday Night
Snow, mainly after 3am. Low around 24. Light south southeast wind becoming southeast 6 to 11 mph after midnight. Winds could gust as high as 17 mph. Chance of precipitation is 80%. New snow accumulation of around an inch possible.
Saturday
Snow. The snow could be heavy at times. High near 33. South southeast wind 13 to 18 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New snow accumulation of 3 to 7 inches possible.
Saturday Night
Snow, mainly before midnight. Low around 25. Breezy, with a south southeast wind 15 to 20 mph becoming west northwest after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 100%.
Sunday
Mostly cloudy, with a high near 28. Blustery, with a west northwest wind 11 to 20 mph, with gusts as high as 25 mph.
Sunday Night
Mostly cloudy, with a low around 9.
Monday
Mostly cloudy, with a high near 22.
Monday Night
A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 13.
Tuesday
Partly sunny, with a high near 25.
Tuesday Night
Mostly cloudy, with a low around 11.
Wednesday
Partly sunny, with a high near 32.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles E Harristown IL
 39.84°N 89.03°W (Elev. 666 ft)
Last Update:
3:16 pm CST Nov 27, 2025
Forecast Valid:
3pm CST Nov 27, 2025-6pm CST Dec 3, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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