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

10°F

-12°C

Humidity 76%
Wind Speed N 9 mph
Barometer 30.38 in (1029.8 mb)
Dewpoint 4°F (-16°C)
Visibility 10.00 mi
Wind Chill-3°F (-19°C)
Last update 4 Dec 6:54 am CST
Extended Forecast for

Decatur Airport IL

  • Today

    Today: Sunny, with a high near 16. Wind chill values between -3 and 7. North northeast wind 5 to 9 mph.

    High: 16 °F

    Sunny

  • Tonight

    Tonight: Patchy freezing fog between 7pm and 5am. Partly cloudy, with a low around 0. Wind chill values between -4 and -9. Light and variable wind becoming south around 6 mph after midnight.

    Low: 0 °F

    Patchy
    Freezing Fog

  • Friday

    Friday: Mostly sunny, with a high near 30. Wind chill values between -2 and 8. South wind 6 to 10 mph.

    High: 30 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 22. South wind 7 to 10 mph becoming west after midnight.

    Low: 22 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 32. West wind around 6 mph becoming north northeast in the afternoon.

    High: 32 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A 30 percent chance of snow after midnight. Cloudy, with a low around 20. Northeast wind 6 to 8 mph.

    Low: 20 °F

    Cloudy then
    Chance Snow

  • Sunday

    Sunday: Mostly cloudy, with a high near 29. North wind 8 to 11 mph, with gusts as high as 15 mph.

    High: 29 °F

    Mostly Cloudy

  • Sunday Night

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

    Low: 9 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 25.

    High: 25 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 16. Wind chill values between -3 and 7. North northeast wind 5 to 9 mph.
Tonight
Patchy freezing fog between 7pm and 5am. Partly cloudy, with a low around 0. Wind chill values between -4 and -9. Light and variable wind becoming south around 6 mph after midnight.
Friday
Mostly sunny, with a high near 30. Wind chill values between -2 and 8. South wind 6 to 10 mph.
Friday Night
Mostly cloudy, with a low around 22. South wind 7 to 10 mph becoming west after midnight.
Saturday
Mostly cloudy, with a high near 32. West wind around 6 mph becoming north northeast in the afternoon.
Saturday Night
A 30 percent chance of snow after midnight. Cloudy, with a low around 20. Northeast wind 6 to 8 mph.
Sunday
Mostly cloudy, with a high near 29. North wind 8 to 11 mph, with gusts as high as 15 mph.
Sunday Night
Mostly cloudy, with a low around 9.
Monday
Mostly sunny, with a high near 25.
Monday Night
Mostly cloudy, with a low around 16.
Tuesday
Partly sunny, with a high near 36.
Tuesday Night
Mostly cloudy, with a low around 25.
Wednesday
A chance of rain. Mostly cloudy, with a high near 38.
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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 am CST Dec 4, 2025
Forecast Valid:
7am CST Dec 4, 2025-6pm CST Dec 10, 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