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 and Breezy

2°F

-17°C

Humidity 44%
Wind Speed NW 22 G 30 mph
Barometer 30.55 in (1035.8 mb)
Dewpoint -15°F (-26°C)
Visibility 10.00 mi
Wind Chill-20°F (-29°C)
Last update 23 Jan 5:54 am CST
Extended Forecast for

Decatur IL

Cold Weather Advisory until January 24, 12:00pm
Winter Storm Warning January 24, 09:00am until January 26, 12:00am
Click here for hazard details and duration
Cold Weather Advisory
Winter Storm Warning
  •  
    Cold Weather Advisory until January 24, 12:00pm

    NOW until 12:00pm Sat

    Cold Weather Advisory

  • Today

    High: 6 °F

    Cold

  • Tonight

    Tonight: Mostly cloudy, with a low around -1. Wind chill values between -13 and -18. Northeast wind 9 to 11 mph, with gusts as high as 17 mph.

    Low: -1 °F

    Mostly Cloudy

  • Saturday

    Saturday: Snow likely, mainly after noon. Cloudy and cold, with a high near 10. Wind chill values between -5 and -15. East northeast wind around 10 mph, with gusts as high as 16 mph. Chance of precipitation is 70%. New snow accumulation of around an inch possible.

    High: 10 °F

    Slight Chance
    Snow then
    Snow Likely

  • Saturday Night

    Saturday Night: Snow. Low around 8. Wind chill values between -1 and -6. East northeast wind 9 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

    Low: 8 °F

    Snow

  • Sunday

    Sunday: Snow, mainly before noon. High near 14. North wind 11 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.

    High: 14 °F

    Snow then
    Chance Snow

  • Sunday Night

    Sunday Night: A 30 percent chance of snow before midnight. Mostly cloudy, with a low around -2. Northwest wind around 10 mph, with gusts as high as 18 mph.

    Low: -2 °F

    Chance Snow
    then Partly
    Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 12. West northwest wind 8 to 10 mph, with gusts as high as 18 mph.

    High: 12 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 2.

    Low: 2 °F

    Mostly Clear

Detailed Forecast

Today
Partly sunny and cold, with a high near 6. Wind chill values between -11 and -21. North wind 11 to 16 mph, with gusts as high as 28 mph.
Tonight
Mostly cloudy, with a low around -1. Wind chill values between -13 and -18. Northeast wind 9 to 11 mph, with gusts as high as 17 mph.
Saturday
Snow likely, mainly after noon. Cloudy and cold, with a high near 10. Wind chill values between -5 and -15. East northeast wind around 10 mph, with gusts as high as 16 mph. Chance of precipitation is 70%. New snow accumulation of around an inch possible.
Saturday Night
Snow. Low around 8. Wind chill values between -1 and -6. East northeast wind 9 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.
Sunday
Snow, mainly before noon. High near 14. North wind 11 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 3 inches possible.
Sunday Night
A 30 percent chance of snow before midnight. Mostly cloudy, with a low around -2. Northwest wind around 10 mph, with gusts as high as 18 mph.
Monday
Mostly sunny, with a high near 12. West northwest wind 8 to 10 mph, with gusts as high as 18 mph.
Monday Night
Mostly clear, with a low around 2.
Tuesday
Mostly sunny, with a high near 24.
Tuesday Night
Partly cloudy, with a low around 3.
Wednesday
Partly sunny, with a high near 17.
Wednesday Night
Partly cloudy, with a low around -2.
Thursday
Mostly sunny, with a high near 13.
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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:
6:11 am CST Jan 23, 2026
Forecast Valid:
6am CST Jan 23, 2026-6pm CST Jan 29, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation