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.

Mostly Cloudy

18°F

-8°C

Humidity 62%
Wind Speed W 17 G 30 mph
Barometer 30.27 in (1026.2 mb)
Dewpoint 7°F (-14°C)
Visibility 10.00 mi
Wind Chill3°F (-16°C)
Last update 27 Jan 2:54 pm CST
Extended Forecast for

3 Miles WSW Forsyth 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 2 and 7. West northwest wind 9 to 15 mph, with gusts as high as 24 mph.

    High: 20 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around -6. Wind chill values between -9 and -19. West northwest wind 5 to 8 mph.

    Low: -6 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 20. Wind chill values between -9 and -19. West wind 7 to 14 mph, with gusts as high as 21 mph.

    High: 20 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 1. Wind chill values between -4 and -9. West wind around 6 mph becoming north after midnight.

    Low: 1 °F

    Increasing
    Clouds

  • Thursday

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

    High: 15 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around -2. North wind 5 to 7 mph.

    Low: -2 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 13. North wind 8 to 10 mph, with gusts as high as 15 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 2 and 7. West northwest wind 9 to 15 mph, with gusts as high as 24 mph.
Tonight
Mostly clear, with a low around -6. Wind chill values between -9 and -19. West northwest wind 5 to 8 mph.
Wednesday
Mostly sunny, with a high near 20. Wind chill values between -9 and -19. West wind 7 to 14 mph, with gusts as high as 21 mph.
Wednesday Night
Increasing clouds, with a low around 1. Wind chill values between -4 and -9. West wind around 6 mph becoming north after midnight.
Thursday
Mostly cloudy, with a high near 15. North wind around 6 mph.
Thursday Night
Mostly cloudy, with a low around -2. North wind 5 to 7 mph.
Friday
Mostly sunny, with a high near 13. North wind 8 to 10 mph, with gusts as high as 15 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 27.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW Forsyth IL
 39.89°N 89.02°W (Elev. 656 ft)
Last Update:
2:36 pm CST Jan 27, 2026
Forecast Valid:
3pm CST Jan 27, 2026-6pm CST Feb 2, 2026
 
Forecast Discussion
 
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