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Hazardous Weather Conditions

Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Overcast

32°F

0°C

Humidity 82%
Wind Speed W 6 mph
Barometer 29.87 in (1012.2 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill26°F (-3°C)
Last update 6 Dec 3:54 am CST
Extended Forecast for

Decatur 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: Cloudy, with a high near 35. West wind around 6 mph becoming light and variable.

    High: 35 °F

    Cloudy

  • Tonight

    Tonight: A slight chance of snow before 11pm, then a chance of freezing rain between 11pm and 1am, then a chance of rain after 1am. Cloudy, with a low around 28. Southeast wind 5 to 9 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 25 during the remainder of the day. Light and variable wind becoming north 9 to 14 mph 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 5 to 11 mph, with gusts as high as 15 mph.

    Low: 11 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 25. North northeast wind around 5 mph becoming south in the afternoon.

    High: 25 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 15. South wind 5 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 11 to 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 38.

    High: 38 °F

    Chance Rain
    then Mostly
    Cloudy

Detailed Forecast

Today
Cloudy, with a high near 35. West wind around 6 mph becoming light and variable.
Tonight
A slight chance of snow before 11pm, then a chance of freezing rain between 11pm and 1am, then a chance of rain after 1am. Cloudy, with a low around 28. Southeast wind 5 to 9 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 25 during the remainder of the day. Light and variable wind becoming north 9 to 14 mph 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 5 to 11 mph, with gusts as high as 15 mph.
Monday
Mostly sunny, with a high near 25. North northeast wind around 5 mph becoming south in the afternoon.
Monday Night
Partly cloudy, with a low around 15. South wind 5 to 14 mph, with gusts as high as 21 mph.
Tuesday
Partly sunny, with a high near 40. Southwest wind 11 to 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 38.
Wednesday Night
Mostly cloudy, with a low around 20.
Thursday
A chance of snow. Mostly cloudy, with a high near 29.
Thursday Night
Mostly cloudy, with a low around 15.
Friday
Partly sunny, with a high near 22.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Decatur IL
 39.84°N 88.94°W (Elev. 692 ft)
Last Update:
4:07 am CST Dec 6, 2025
Forecast Valid:
4am 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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National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation