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Hazardous Weather Conditions

Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Overcast

34°F

1°C

Humidity 79%
Wind Speed NW 6 mph
Barometer 29.98 in (1015.9 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 6 Dec 8:54 am CST
Extended Forecast for

Decatur Airport IL

Winter Weather Advisory December 6, 09:00pm until December 7, 06:00am
Click here for hazard details and duration
Winter Weather Advisory

  • Today

    Today: Mostly cloudy, with a high near 35. West wind around 5 mph becoming southeast in the afternoon.

    High: 35 °F

    Mostly Cloudy

  • Tonight

    Tonight: A slight chance of snow before 11pm, then a chance of freezing rain between 11pm and 2am, then a chance of rain after 2am. Cloudy, with a low around 28. Southeast wind 6 to 10 mph. Chance of precipitation is 50%.

    Low: 28 °F

    Slight Chance
    Wintry Mix
    then Chance
    Rain/Freezing
    Rain

  • Sunday

    Sunday: A chance of rain before 10am, then a chance of snow between 10am and noon. Mostly cloudy, with a temperature rising to near 34 by 9am, then falling to around 26 during the remainder of the day. South wind 5 to 15 mph becoming north in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 40%.

    High: 34 °F⇓

    Chance
    Rain/Snow
    then Mostly
    Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 11. Wind chill values between 4 and 9. North wind 6 to 13 mph, with gusts as high as 16 mph.

    Low: 11 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 25. North northeast wind around 6 mph becoming south in the afternoon.

    High: 25 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 15. South wind 6 to 14 mph, with gusts as high as 21 mph.

    Low: 15 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 40. Southwest wind around 14 mph, with gusts as high as 21 mph.

    High: 40 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 40 percent chance of rain after midnight. Mostly cloudy, with a low around 36.

    Low: 36 °F

    Cloudy then
    Chance Rain

  • Wednesday

    Wednesday: A 30 percent chance of rain before noon. Mostly cloudy, with a high near 37.

    High: 37 °F

    Chance Rain
    then Mostly
    Cloudy

Detailed Forecast

Today
Mostly cloudy, with a high near 35. West wind around 5 mph becoming southeast in the afternoon.
Tonight
A slight chance of snow before 11pm, then a chance of freezing rain between 11pm and 2am, then a chance of rain after 2am. Cloudy, with a low around 28. Southeast wind 6 to 10 mph. Chance of precipitation is 50%.
Sunday
A chance of rain before 10am, then a chance of snow between 10am and noon. Mostly cloudy, with a temperature rising to near 34 by 9am, then falling to around 26 during the remainder of the day. South wind 5 to 15 mph becoming north in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 40%.
Sunday Night
Mostly cloudy, with a low around 11. Wind chill values between 4 and 9. North wind 6 to 13 mph, with gusts as high as 16 mph.
Monday
Mostly sunny, with a high near 25. North northeast wind around 6 mph becoming south in the afternoon.
Monday Night
Partly cloudy, with a low around 15. South wind 6 to 14 mph, with gusts as high as 21 mph.
Tuesday
Partly sunny, with a high near 40. Southwest wind around 14 mph, with gusts as high as 21 mph.
Tuesday Night
A 40 percent chance of rain after midnight. Mostly cloudy, with a low around 36.
Wednesday
A 30 percent chance of rain before noon. Mostly cloudy, with a high near 37.
Wednesday Night
Mostly cloudy, with a low around 19.
Thursday
A chance of snow. Mostly cloudy, with a high near 30.
Thursday Night
Mostly cloudy, with a low around 16.
Friday
Partly sunny, with a high near 24.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Decatur Airport IL
 39.84°N 88.88°W (Elev. 650 ft)
Last Update:
4:07 am CST Dec 6, 2025
Forecast Valid:
9am CST Dec 6, 2025-6pm CST Dec 12, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation