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Hazardous Weather Conditions

Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fair

3°F

-16°C

Humidity 87%
Wind Speed S 5 mph
Barometer 30.08 in (1020.2 mb)
Dewpoint 0°F (-18°C)
Visibility 10.00 mi
Wind Chill-7°F (-22°C)
Last update 5 Dec 5:54 am CST
Extended Forecast for

Decatur Airport IL

  • Today

    Today: Patchy freezing fog before 9am. Partly sunny, then gradually becoming sunny, with a high near 30. Wind chill values between -8 and 2. South southwest wind 5 to 10 mph, with gusts as high as 18 mph.

    High: 30 °F

    Patchy
    Freezing Fog
    then Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 23. South wind 7 to 11 mph becoming west after midnight. Winds could gust as high as 17 mph.

    Low: 23 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Mostly cloudy, with a high near 32. West wind 5 to 7 mph becoming light and variable.

    High: 32 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A 50 percent chance of snow after midnight. Cloudy, with a low around 23. East southeast wind 5 to 9 mph.

    Low: 23 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday

    Sunday: Snow likely before noon. Mostly cloudy, with a high near 31. East southeast wind 9 to 14 mph becoming north in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    High: 31 °F

    Snow Likely
    then Mostly
    Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 6. North wind 5 to 11 mph, with gusts as high as 16 mph.

    Low: 6 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 25. Light and variable wind becoming south 5 to 7 mph in the morning.

    High: 25 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 16.

    Low: 16 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 38.

    High: 38 °F

    Partly Sunny

Detailed Forecast

Today
Patchy freezing fog before 9am. Partly sunny, then gradually becoming sunny, with a high near 30. Wind chill values between -8 and 2. South southwest wind 5 to 10 mph, with gusts as high as 18 mph.
Tonight
Increasing clouds, with a low around 23. South wind 7 to 11 mph becoming west after midnight. Winds could gust as high as 17 mph.
Saturday
Mostly cloudy, with a high near 32. West wind 5 to 7 mph becoming light and variable.
Saturday Night
A 50 percent chance of snow after midnight. Cloudy, with a low around 23. East southeast wind 5 to 9 mph.
Sunday
Snow likely before noon. Mostly cloudy, with a high near 31. East southeast wind 9 to 14 mph becoming north in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Sunday Night
Mostly cloudy, with a low around 6. North wind 5 to 11 mph, with gusts as high as 16 mph.
Monday
Mostly sunny, with a high near 25. Light and variable wind becoming south 5 to 7 mph in the morning.
Monday Night
Mostly cloudy, with a low around 16.
Tuesday
Partly sunny, with a high near 38.
Tuesday Night
A 30 percent chance of rain after midnight. Mostly cloudy, with a low around 29.
Wednesday
A chance of rain. Mostly cloudy, with a high near 38.
Wednesday Night
Mostly cloudy, with a low around 16.
Thursday
Mostly cloudy, with a high near 27.
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ABOUT THIS FORECAST

 
Point Forecast:
Decatur Airport IL
 39.84°N 88.88°W (Elev. 650 ft)
Last Update:
5:36 am CST Dec 5, 2025
Forecast Valid:
6am CST Dec 5, 2025-6pm CST Dec 11, 2025
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation