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

13°F

-11°C

Humidity 64%
Wind Speed N 7 mph
Barometer 30.31 in (1027.7 mb)
Dewpoint 3°F (-16°C)
Visibility 10.00 mi
Wind Chill3°F (-16°C)
Last update 29 Jan 4:54 pm CST
Extended Forecast for

Forsyth IL

  • Tonight

    Tonight: Partly cloudy, with a low around -2. Wind chill values between -4 and -14. North wind 3 to 6 mph.

    Low: -2 °F

    Partly Cloudy

  • Friday

    Friday: Increasing clouds, with a high near 15. Wind chill values between -4 and -14. North northwest wind 6 to 13 mph, with gusts as high as 16 mph.

    High: 15 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: A slight chance of snow before 9pm, then a chance of flurries between 9pm and midnight. Partly cloudy, with a low around 2. Wind chill values between -4 and -14. North wind 10 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.

    Low: 2 °F

    Slight Chance
    Snow then
    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 19. Wind chill values between -4 and -14. Northwest wind 11 to 16 mph, with gusts as high as 23 mph.

    High: 19 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 0. West northwest wind 5 to 8 mph.

    Low: 0 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 23. West wind 5 to 9 mph becoming south in the afternoon.

    High: 23 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 13. South wind around 8 mph.

    Low: 13 °F

    Chance Snow
    then Mostly
    Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 29.

    High: 29 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 15.

    Low: 15 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around -2. Wind chill values between -4 and -14. North wind 3 to 6 mph.
Friday
Increasing clouds, with a high near 15. Wind chill values between -4 and -14. North northwest wind 6 to 13 mph, with gusts as high as 16 mph.
Friday Night
A slight chance of snow before 9pm, then a chance of flurries between 9pm and midnight. Partly cloudy, with a low around 2. Wind chill values between -4 and -14. North wind 10 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
Saturday
Mostly sunny, with a high near 19. Wind chill values between -4 and -14. Northwest wind 11 to 16 mph, with gusts as high as 23 mph.
Saturday Night
Mostly clear, with a low around 0. West northwest wind 5 to 8 mph.
Sunday
Mostly sunny, with a high near 23. West wind 5 to 9 mph becoming south in the afternoon.
Sunday Night
A 30 percent chance of snow before midnight. Mostly cloudy, with a low around 13. South wind around 8 mph.
Monday
Mostly cloudy, with a high near 29.
Monday Night
Mostly cloudy, with a low around 15.
Tuesday
A 30 percent chance of snow after noon. Mostly cloudy, with a high near 29.
Tuesday Night
A chance of snow. Mostly cloudy, with a low around 19.
Wednesday
A chance of snow. Mostly cloudy, with a high near 28.
Wednesday Night
Mostly cloudy, with a low around 16.
Thursday
Partly sunny, with a high near 29.
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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:
4:22 pm CST Jan 29, 2026
Forecast Valid:
5pm CST Jan 29, 2026-6pm CST Feb 5, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation