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.

Fair

19°F

-7°C

Humidity 65%
Wind Speed SW 10 mph
Barometer 30.32 in (1027.9 mb)
Dewpoint 9°F (-13°C)
Visibility 10.00 mi
Wind Chill8°F (-13°C)
Last update 1 Feb 11:54 am CST
Extended Forecast for

Forsyth IL

  • This Afternoon

    This Afternoon: A 40 percent chance of snow, mainly after 5pm. Mostly cloudy, with a high near 24. South wind around 10 mph, with gusts as high as 16 mph.

    High: 24 °F

    Chance Snow

  • Tonight

    Tonight: Snow likely, mainly before 9pm. Mostly cloudy, with a low around 16. South wind 7 to 9 mph, with gusts as high as 15 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 16 °F

    Snow Likely
    then Mostly
    Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 31. West wind 6 to 10 mph.

    High: 31 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 19. West southwest wind around 5 mph becoming calm.

    Low: 19 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 29. Northeast wind 6 to 9 mph.

    High: 29 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 9. North northeast wind around 6 mph.

    Low: 9 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 24. North wind around 6 mph.

    High: 24 °F

    Mostly Sunny

  • Wednesday Night

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

    Low: 7 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 33.

    High: 33 °F

    Partly Sunny

Detailed Forecast

This Afternoon
A 40 percent chance of snow, mainly after 5pm. Mostly cloudy, with a high near 24. South wind around 10 mph, with gusts as high as 16 mph.
Tonight
Snow likely, mainly before 9pm. Mostly cloudy, with a low around 16. South wind 7 to 9 mph, with gusts as high as 15 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Monday
Mostly cloudy, with a high near 31. West wind 6 to 10 mph.
Monday Night
Mostly cloudy, with a low around 19. West southwest wind around 5 mph becoming calm.
Tuesday
Mostly cloudy, with a high near 29. Northeast wind 6 to 9 mph.
Tuesday Night
Mostly cloudy, with a low around 9. North northeast wind around 6 mph.
Wednesday
Mostly sunny, with a high near 24. North wind around 6 mph.
Wednesday Night
Partly cloudy, with a low around 7.
Thursday
Partly sunny, with a high near 33.
Thursday Night
Mostly cloudy, with a low around 26.
Friday
Partly sunny, with a high near 37.
Friday Night
Mostly cloudy, with a low around 14.
Saturday
Mostly sunny, with a high near 25.
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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:
12:16 pm CST Feb 1, 2026
Forecast Valid:
12pm CST Feb 1, 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