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

53°F

12°C

Humidity 89%
Wind Speed W 6 mph
Barometer 29.83 in (1010.2 mb)
Dewpoint 50°F (10°C)
Visibility 9.00 mi
Wind Chill51°F (11°C)
Last update 25 Nov 3:54 pm CST
Extended Forecast for

2 Miles ENE Harristown IL

Wind Advisory November 26, 03:00am until November 26, 06:00pm
Click here for hazard details and duration
Wind Advisory

  • Tonight

    Tonight: A chance of rain between 7pm and 11pm. Cloudy during the early evening, then gradual clearing, with a low around 33. Breezy, with a west wind 8 to 13 mph increasing to 20 to 25 mph after midnight. Winds could gust as high as 39 mph. Chance of precipitation is 40%.

    Low: 33 °F

    Chance Rain
    then
    Increasing
    Clouds and
    Breezy

  • Wednesday

    Wednesday: Cloudy through mid morning, then gradual clearing, with a high near 40. Breezy, with a west northwest wind 20 to 26 mph, with gusts as high as 43 mph.

    High: 40 °F

    Gradual
    Clearing and
    Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 23. West northwest wind 14 to 18 mph, with gusts as high as 31 mph.

    Low: 23 °F

    Partly Cloudy

  • Thanksgiving Day

    Thanksgiving Day: Sunny, with a high near 37. West northwest wind 13 to 18 mph, with gusts as high as 26 mph.

    High: 37 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 18. West northwest wind 6 to 10 mph, with gusts as high as 16 mph.

    Low: 18 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 34. West northwest wind around 6 mph becoming calm in the afternoon.

    High: 34 °F

    Sunny

  • Friday Night

    Friday Night: Snow likely after midnight. Mostly cloudy, with a low around 24. Light south southeast wind becoming southeast 8 to 13 mph in the evening. Winds could gust as high as 18 mph. Chance of precipitation is 60%.

    Low: 24 °F

    Mostly Cloudy
    then Snow
    Likely

  • Saturday

    Saturday: Snow before noon, then rain and snow. High near 35. Chance of precipitation is 90%.

    High: 35 °F

    Snow then
    Rain/Snow

  • Saturday Night

    Saturday Night: Rain likely, mainly before midnight. Cloudy, with a low around 28. Chance of precipitation is 70%.

    Low: 28 °F

    Rain Likely
    then Chance
    Rain

Detailed Forecast

Tonight
A chance of rain between 7pm and 11pm. Cloudy during the early evening, then gradual clearing, with a low around 33. Breezy, with a west wind 8 to 13 mph increasing to 20 to 25 mph after midnight. Winds could gust as high as 39 mph. Chance of precipitation is 40%.
Wednesday
Cloudy through mid morning, then gradual clearing, with a high near 40. Breezy, with a west northwest wind 20 to 26 mph, with gusts as high as 43 mph.
Wednesday Night
Partly cloudy, with a low around 23. West northwest wind 14 to 18 mph, with gusts as high as 31 mph.
Thanksgiving Day
Sunny, with a high near 37. West northwest wind 13 to 18 mph, with gusts as high as 26 mph.
Thursday Night
Mostly clear, with a low around 18. West northwest wind 6 to 10 mph, with gusts as high as 16 mph.
Friday
Sunny, with a high near 34. West northwest wind around 6 mph becoming calm in the afternoon.
Friday Night
Snow likely after midnight. Mostly cloudy, with a low around 24. Light south southeast wind becoming southeast 8 to 13 mph in the evening. Winds could gust as high as 18 mph. Chance of precipitation is 60%.
Saturday
Snow before noon, then rain and snow. High near 35. Chance of precipitation is 90%.
Saturday Night
Rain likely, mainly before midnight. Cloudy, with a low around 28. Chance of precipitation is 70%.
Sunday
A 30 percent chance of snow before noon. Mostly cloudy, with a high near 32.
Sunday Night
Mostly cloudy, with a low around 12.
Monday
Partly sunny, with a high near 25.
Monday Night
Mostly cloudy, with a low around 12.
Tuesday
Partly sunny, with a high near 25.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE Harristown IL
 39.84°N 89.03°W (Elev. 666 ft)
Last Update:
3:36 pm CST Nov 25, 2025
Forecast Valid:
4pm CST Nov 25, 2025-6pm CST Dec 2, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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