National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fair

27°F

-3°C

Humidity 75%
Wind Speed SE 8 mph
Barometer 30.22 in (1024.3 mb)
Dewpoint 20°F (-7°C)
Visibility 10.00 mi
Wind Chill19°F (-7°C)
Last update 8 Feb 6:54 pm CST
Extended Forecast for

Forsyth IL

  • Tonight

    Tonight: Partly cloudy, with a low around 23. East southeast wind 6 to 10 mph, with gusts as high as 17 mph.

    Low: 23 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 44. East southeast wind 5 to 8 mph becoming south in the afternoon.

    High: 44 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 33. South southeast wind 9 to 11 mph becoming west southwest after midnight. Winds could gust as high as 20 mph.

    Low: 33 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 51. Northwest wind 8 to 11 mph, with gusts as high as 16 mph.

    High: 51 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 26. North northwest wind around 8 mph.

    Low: 26 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 44. North northwest wind 7 to 9 mph.

    High: 44 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 27. North northwest wind around 7 mph becoming east after midnight.

    Low: 27 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 30 percent chance of snow after noon. Cloudy, with a high near 40.

    High: 40 °F

    Mostly Cloudy
    then Chance
    Snow

  • Thursday Night

    Thursday Night: A 50 percent chance of snow. Mostly cloudy, with a low around 27.

    Low: 27 °F

    Chance Snow

Detailed Forecast

Tonight
Partly cloudy, with a low around 23. East southeast wind 6 to 10 mph, with gusts as high as 17 mph.
Monday
Mostly sunny, with a high near 44. East southeast wind 5 to 8 mph becoming south in the afternoon.
Monday Night
Mostly clear, with a low around 33. South southeast wind 9 to 11 mph becoming west southwest after midnight. Winds could gust as high as 20 mph.
Tuesday
Sunny, with a high near 51. Northwest wind 8 to 11 mph, with gusts as high as 16 mph.
Tuesday Night
Partly cloudy, with a low around 26. North northwest wind around 8 mph.
Wednesday
Mostly sunny, with a high near 44. North northwest wind 7 to 9 mph.
Wednesday Night
Mostly cloudy, with a low around 27. North northwest wind around 7 mph becoming east after midnight.
Thursday
A 30 percent chance of snow after noon. Cloudy, with a high near 40.
Thursday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 27.
Friday
Mostly sunny, with a high near 41.
Friday Night
A chance of rain and snow. Partly cloudy, with a low around 26.
Saturday
A chance of rain. Partly sunny, with a high near 41.
Saturday Night
A chance of rain. Mostly cloudy, with a low around 29.
Sunday
Mostly sunny, with a high near 45.
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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:
6:36 pm CST Feb 8, 2026
Forecast Valid:
7pm CST Feb 8, 2026-6pm CST Feb 15, 2026
 
Forecast Discussion
 
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Additional Resources

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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