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.

Overcast

21°F

-6°C

Humidity 52%
Wind Speed W 7 mph
Barometer 30.22 in (1024.8 mb)
Dewpoint 6°F (-14°C)
Visibility 10.00 mi
Wind Chill12°F (-11°C)
Last update 28 Jan 4:54 pm CST
Extended Forecast for

Forsyth IL

  • Tonight

    Tonight: Increasing clouds, with a low around -1. Wind chill values between -6 and -11. West wind 5 to 7 mph becoming north after midnight.

    Low: -1 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Mostly cloudy, with a high near 16. Wind chill values between -10 and zero. North wind 5 to 7 mph.

    High: 16 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: A slight chance of snow before midnight, then a chance of flurries after midnight. Mostly cloudy, with a low around -2. Wind chill values between -8 and -13. North wind around 6 mph becoming calm. Chance of precipitation is 20%.

    Low: -2 °F

    Slight Chance
    Snow then
    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 16. Wind chill values between -4 and -14. North wind 6 to 10 mph.

    High: 16 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 1. North wind 8 to 13 mph, with gusts as high as 20 mph.

    Low: 1 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 18. Northwest wind 10 to 14 mph, with gusts as high as 20 mph.

    High: 18 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 1. Northwest wind 6 to 9 mph.

    Low: 1 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 22.

    High: 22 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 11.

    Low: 11 °F

    Chance Snow
    then Mostly
    Cloudy

Detailed Forecast

Tonight
Increasing clouds, with a low around -1. Wind chill values between -6 and -11. West wind 5 to 7 mph becoming north after midnight.
Thursday
Mostly cloudy, with a high near 16. Wind chill values between -10 and zero. North wind 5 to 7 mph.
Thursday Night
A slight chance of snow before midnight, then a chance of flurries after midnight. Mostly cloudy, with a low around -2. Wind chill values between -8 and -13. North wind around 6 mph becoming calm. Chance of precipitation is 20%.
Friday
Mostly sunny, with a high near 16. Wind chill values between -4 and -14. North wind 6 to 10 mph.
Friday Night
Partly cloudy, with a low around 1. North wind 8 to 13 mph, with gusts as high as 20 mph.
Saturday
Mostly sunny, with a high near 18. Northwest wind 10 to 14 mph, with gusts as high as 20 mph.
Saturday Night
Partly cloudy, with a low around 1. Northwest wind 6 to 9 mph.
Sunday
Partly sunny, with a high near 22.
Sunday Night
A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 11.
Monday
Mostly cloudy, with a high near 28.
Monday Night
Mostly cloudy, with a low around 16.
Tuesday
Mostly cloudy, with a high near 30.
Tuesday Night
A chance of snow. Mostly cloudy, with a low around 21.
Wednesday
A chance of snow. Cloudy, with a high near 31.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Forsyth IL
 39.93°N 88.96°W (Elev. 650 ft)
Last Update:
4:26 pm CST Jan 28, 2026
Forecast Valid:
5pm CST Jan 28, 2026-6pm CST Feb 4, 2026
 
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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