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.

A Few Clouds

22°F

-6°C

Humidity 78%
Wind Speed NW 13 mph
Barometer 30.29 in (1026.6 mb)
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Wind Chill10°F (-12°C)
Last update 4 Dec 1:54 am CST
Extended Forecast for

3 Miles WSW Forsyth IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 5. North wind 10 to 14 mph, with gusts as high as 21 mph.

    Low: 5 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 16. Wind chill values between -8 and 2. North wind 5 to 10 mph becoming light and variable in the afternoon. Winds could gust as high as 15 mph.

    High: 16 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 2. Wind chill values between -2 and -7. Calm wind becoming south around 6 mph after midnight.

    Low: 2 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 31. Wind chill values between -4 and 6. South wind 6 to 10 mph, with gusts as high as 15 mph.

    High: 31 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 21. South wind 7 to 9 mph becoming west after midnight. Winds could gust as high as 15 mph.

    Low: 21 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 31. West southwest wind around 6 mph becoming north northeast in the afternoon.

    High: 31 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 18. North northeast wind 5 to 8 mph.

    Low: 18 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 27.

    High: 27 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 8.

    Low: 8 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 5. North wind 10 to 14 mph, with gusts as high as 21 mph.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 16. Wind chill values between -8 and 2. North wind 5 to 10 mph becoming light and variable in the afternoon. Winds could gust as high as 15 mph.
Thursday Night
Mostly clear, with a low around 2. Wind chill values between -2 and -7. Calm wind becoming south around 6 mph after midnight.
Friday
Mostly sunny, with a high near 31. Wind chill values between -4 and 6. South wind 6 to 10 mph, with gusts as high as 15 mph.
Friday Night
Mostly cloudy, with a low around 21. South wind 7 to 9 mph becoming west after midnight. Winds could gust as high as 15 mph.
Saturday
Partly sunny, with a high near 31. West southwest wind around 6 mph becoming north northeast in the afternoon.
Saturday Night
Mostly cloudy, with a low around 18. North northeast wind 5 to 8 mph.
Sunday
Mostly cloudy, with a high near 27.
Sunday Night
Mostly cloudy, with a low around 8.
Monday
Partly sunny, with a high near 26.
Monday Night
Mostly cloudy, with a low around 17.
Tuesday
Partly sunny, with a high near 35.
Tuesday Night
Mostly cloudy, with a low around 25.
Wednesday
A chance of rain. Mostly cloudy, with a high near 39.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW Forsyth IL
 39.89°N 89.02°W (Elev. 656 ft)
Last Update:
2:35 am CST Dec 4, 2025
Forecast Valid:
2am CST Dec 4, 2025-6pm CST Dec 10, 2025
 
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