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

18°F

-8°C

Humidity 54%
Wind Speed N 6 mph
Barometer 30.32 in (1028.0 mb)
Dewpoint 4°F (-16°C)
Visibility 10.00 mi
Wind Chill10°F (-12°C)
Last update 4 Dec 2:54 pm CST
Extended Forecast for

Decatur Airport IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 19. Wind chill values between 4 and 9. North northeast wind around 6 mph.

    High: 19 °F

    Sunny

  • Tonight

    Tonight: Patchy freezing fog after 9pm. Partly cloudy, with a low around 1. Wind chill values between -1 and -6. Northeast wind around 5 mph becoming calm.

    Low: 1 °F

    Patchy
    Freezing Fog

  • Friday

    Friday: Patchy freezing fog before 9am. Sunny, with a high near 29. Wind chill values between -1 and 9. South wind 6 to 10 mph, with gusts as high as 16 mph.

    High: 29 °F

    Patchy
    Freezing Fog
    then Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 23. South wind 7 to 10 mph becoming west after midnight.

    Low: 23 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Mostly cloudy, with a high near 32. West wind 5 to 7 mph becoming northeast in the afternoon.

    High: 32 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A 40 percent chance of snow after midnight. Mostly cloudy, with a low around 22. East wind 5 to 8 mph.

    Low: 22 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday

    Sunday: A 50 percent chance of snow before noon. Mostly cloudy, with a high near 29. East wind 8 to 13 mph becoming north in the afternoon. Winds could gust as high as 18 mph.

    High: 29 °F

    Chance Snow
    then Mostly
    Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 7.

    Low: 7 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 24.

    High: 24 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 19. Wind chill values between 4 and 9. North northeast wind around 6 mph.
Tonight
Patchy freezing fog after 9pm. Partly cloudy, with a low around 1. Wind chill values between -1 and -6. Northeast wind around 5 mph becoming calm.
Friday
Patchy freezing fog before 9am. Sunny, with a high near 29. Wind chill values between -1 and 9. South wind 6 to 10 mph, with gusts as high as 16 mph.
Friday Night
Increasing clouds, with a low around 23. South wind 7 to 10 mph becoming west after midnight.
Saturday
Mostly cloudy, with a high near 32. West wind 5 to 7 mph becoming northeast in the afternoon.
Saturday Night
A 40 percent chance of snow after midnight. Mostly cloudy, with a low around 22. East wind 5 to 8 mph.
Sunday
A 50 percent chance of snow before noon. Mostly cloudy, with a high near 29. East wind 8 to 13 mph becoming north in the afternoon. Winds could gust as high as 18 mph.
Sunday Night
Mostly cloudy, with a low around 7.
Monday
Mostly sunny, with a high near 24.
Monday Night
Mostly cloudy, with a low around 16.
Tuesday
Partly sunny, with a high near 35.
Tuesday Night
Mostly cloudy, with a low around 26.
Wednesday
A chance of rain. Mostly cloudy, with a high near 36.
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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:
3:16 pm CST Dec 4, 2025
Forecast Valid:
3pm CST Dec 4, 2025-6pm CST Dec 10, 2025
 
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Additional Resources

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Chance of Precipitation