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

15°F

-9°C

Humidity 77%
Wind Speed W 8 mph
Barometer 30.42 in (1031.3 mb)
Dewpoint 9°F (-13°C)
Visibility 10.00 mi
Wind Chill4°F (-16°C)
Last update 31 Jan 10:54 pm CST
Extended Forecast for

Forsyth IL

  • Tonight

    Tonight: Partly cloudy, with a low around 0. Wind chill values between -2 and -7. West southwest wind 3 to 5 mph.

    Low: 0 °F

    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of snow after noon. Partly sunny, with a high near 24. Wind chill values between -3 and 7. Light southwest wind becoming south southwest 5 to 10 mph in the morning. Winds could gust as high as 16 mph.

    High: 24 °F

    Partly Sunny
    then Slight
    Chance Snow

  • Sunday Night

    Sunday Night: Snow likely, mainly before midnight. Mostly cloudy, with a low around 16. South wind 7 to 9 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 16 °F

    Snow Likely
    then Slight
    Chance Snow

  • Monday

    Monday: Mostly cloudy, with a high near 32. West wind 7 to 10 mph.

    High: 32 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 19. West wind around 6 mph becoming light and variable.

    Low: 19 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Cloudy, then gradually becoming mostly sunny, with a high near 28. Northeast wind 6 to 9 mph.

    High: 28 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 9. North northeast wind around 7 mph.

    Low: 9 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 24.

    High: 24 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 7.

    Low: 7 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 0. Wind chill values between -2 and -7. West southwest wind 3 to 5 mph.
Sunday
A 20 percent chance of snow after noon. Partly sunny, with a high near 24. Wind chill values between -3 and 7. Light southwest wind becoming south southwest 5 to 10 mph in the morning. Winds could gust as high as 16 mph.
Sunday Night
Snow likely, mainly before midnight. Mostly cloudy, with a low around 16. South wind 7 to 9 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Monday
Mostly cloudy, with a high near 32. West wind 7 to 10 mph.
Monday Night
Mostly cloudy, with a low around 19. West wind around 6 mph becoming light and variable.
Tuesday
Cloudy, then gradually becoming mostly sunny, with a high near 28. Northeast wind 6 to 9 mph.
Tuesday Night
Partly cloudy, with a low around 9. North northeast wind around 7 mph.
Wednesday
Mostly sunny, with a high near 24.
Wednesday Night
Partly cloudy, with a low around 7.
Thursday
Partly sunny, with a high near 31.
Thursday Night
Mostly cloudy, with a low around 23.
Friday
Partly sunny, with a high near 37.
Friday Night
Mostly cloudy, with a low around 16.
Saturday
Mostly sunny, with a high near 27.
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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:
9:27 pm CST Jan 31, 2026
Forecast Valid:
11pm CST Jan 31, 2026-6pm CST Feb 7, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation