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

19°F

-7°C

Humidity 54%
Wind Speed W 22 G 35 mph
Barometer 30.23 in (1024.9 mb)
Dewpoint 5°F (-15°C)
Visibility 9.00 mi
Wind Chill2°F (-17°C)
Last update 27 Jan 12:54 pm CST
Extended Forecast for

Decatur IL

Cold Weather Advisory January 27, 09:00pm until January 28, 10:00am
Click here for hazard details and duration
Cold Weather Advisory

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 20. Wind chill values between 1 and 6. West northwest wind 9 to 16 mph, with gusts as high as 25 mph.

    High: 20 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around -6. Wind chill values between -12 and -17. West northwest wind 5 to 7 mph.

    Low: -6 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 19. Wind chill values between -7 and -17. West wind 6 to 13 mph, with gusts as high as 21 mph.

    High: 19 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 1. Wind chill values between -2 and -7. West wind around 6 mph becoming light and variable in the evening.

    Low: 1 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Mostly cloudy, with a high near 15. North wind 3 to 6 mph.

    High: 15 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around -2. North wind 3 to 6 mph.

    Low: -2 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 13. North wind 6 to 9 mph.

    High: 13 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 0.

    Low: 0 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 17.

    High: 17 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 20. Wind chill values between 1 and 6. West northwest wind 9 to 16 mph, with gusts as high as 25 mph.
Tonight
Mostly clear, with a low around -6. Wind chill values between -12 and -17. West northwest wind 5 to 7 mph.
Wednesday
Mostly sunny, with a high near 19. Wind chill values between -7 and -17. West wind 6 to 13 mph, with gusts as high as 21 mph.
Wednesday Night
Increasing clouds, with a low around 1. Wind chill values between -2 and -7. West wind around 6 mph becoming light and variable in the evening.
Thursday
Mostly cloudy, with a high near 15. North wind 3 to 6 mph.
Thursday Night
Mostly cloudy, with a low around -2. North wind 3 to 6 mph.
Friday
Mostly sunny, with a high near 13. North wind 6 to 9 mph.
Friday Night
Partly cloudy, with a low around 0.
Saturday
Mostly sunny, with a high near 17.
Saturday Night
Partly cloudy, with a low around 1.
Sunday
Partly sunny, with a high near 21.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 11.
Monday
Mostly cloudy, with a high near 26.
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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:
1:16 pm CST Jan 27, 2026
Forecast Valid:
1pm CST Jan 27, 2026-6pm CST Feb 2, 2026
 
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