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

30°F

-1°C

Humidity 88%
Wind Speed SW 9 mph
Barometer 30.16 in (1022.3 mb)
Dewpoint 27°F (-3°C)
Visibility 9.00 mi
Wind Chill22°F (-6°C)
Last update 3 Dec 6:54 pm CST
Extended Forecast for

Decatur Airport IL

  • Tonight

    Tonight: A chance of snow and freezing rain before 10pm, then a slight chance of snow between 10pm and 11pm. Cloudy, with a low around 5. Wind chill values between -3 and 2. North wind 10 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.

    Low: 5 °F

    Chance Wintry
    Mix then
    Cloudy

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 16. Wind chill values between -9 and 1. North wind 5 to 10 mph becoming light in the afternoon.

    High: 16 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 3. Wind chill values between -4 and 1. Calm wind becoming south around 6 mph after midnight.

    Low: 3 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 30. Wind chill values between -2 and 8. South southwest wind 6 to 9 mph.

    High: 30 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 19. South southwest wind 6 to 8 mph.

    Low: 19 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 30. West southwest wind around 6 mph becoming north northeast in the afternoon.

    High: 30 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 19. Northeast wind 5 to 7 mph.

    Low: 19 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 28.

    High: 28 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 10.

    Low: 10 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A chance of snow and freezing rain before 10pm, then a slight chance of snow between 10pm and 11pm. Cloudy, with a low around 5. Wind chill values between -3 and 2. North wind 10 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 16. Wind chill values between -9 and 1. North wind 5 to 10 mph becoming light in the afternoon.
Thursday Night
Partly cloudy, with a low around 3. Wind chill values between -4 and 1. Calm wind becoming south around 6 mph after midnight.
Friday
Mostly sunny, with a high near 30. Wind chill values between -2 and 8. South southwest wind 6 to 9 mph.
Friday Night
Mostly cloudy, with a low around 19. South southwest wind 6 to 8 mph.
Saturday
Partly sunny, with a high near 30. West southwest wind around 6 mph becoming north northeast in the afternoon.
Saturday Night
Mostly cloudy, with a low around 19. Northeast wind 5 to 7 mph.
Sunday
Mostly cloudy, with a high near 28.
Sunday Night
Mostly cloudy, with a low around 10.
Monday
Partly sunny, with a high near 26.
Monday Night
Mostly cloudy, with a low around 17.
Tuesday
Partly sunny, with a high near 36.
Tuesday Night
Mostly cloudy, with a low around 26.
Wednesday
A chance of rain. Mostly cloudy, with a high near 39.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Decatur Airport IL
 39.84°N 88.88°W (Elev. 650 ft)
Last Update:
6:36 pm CST Dec 3, 2025
Forecast Valid:
7pm CST Dec 3, 2025-6pm CST Dec 10, 2025
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation