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

28°F

-2°C

Humidity 53%
Wind Speed SE 7 mph
Barometer 30.38 in (1029.4 mb)
Dewpoint 13°F (-11°C)
Visibility 10.00 mi
Wind Chill21°F (-6°C)
Last update 7 Feb 2:54 pm CST
Extended Forecast for

Forsyth IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 29. East southeast wind around 6 mph.

    High: 29 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 21. Southeast wind 6 to 11 mph, with gusts as high as 21 mph.

    Low: 21 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Partly sunny, with a high near 35. Southeast wind 11 to 16 mph, with gusts as high as 24 mph.

    High: 35 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 23. East southeast wind 6 to 10 mph, with gusts as high as 16 mph.

    Low: 23 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 47. South wind 6 to 9 mph.

    High: 47 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 35. South wind 8 to 10 mph, with gusts as high as 17 mph.

    Low: 35 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 55. West southwest wind around 10 mph becoming north northwest in the afternoon. Winds could gust as high as 16 mph.

    High: 55 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of rain. Mostly cloudy, with a low around 30.

    Low: 30 °F

    Chance Rain

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 45.

    High: 45 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
Sunny, with a high near 29. East southeast wind around 6 mph.
Tonight
Increasing clouds, with a low around 21. Southeast wind 6 to 11 mph, with gusts as high as 21 mph.
Sunday
Partly sunny, with a high near 35. Southeast wind 11 to 16 mph, with gusts as high as 24 mph.
Sunday Night
Partly cloudy, with a low around 23. East southeast wind 6 to 10 mph, with gusts as high as 16 mph.
Monday
Mostly sunny, with a high near 47. South wind 6 to 9 mph.
Monday Night
Mostly clear, with a low around 35. South wind 8 to 10 mph, with gusts as high as 17 mph.
Tuesday
Mostly sunny, with a high near 55. West southwest wind around 10 mph becoming north northwest in the afternoon. Winds could gust as high as 16 mph.
Tuesday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 30.
Wednesday
Mostly cloudy, with a high near 45.
Wednesday Night
Mostly cloudy, with a low around 28.
Thursday
A chance of rain. Cloudy, with a high near 40.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 24.
Friday
Mostly sunny, with a high near 41.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Forsyth IL
 39.93°N 88.96°W (Elev. 650 ft)
Last Update:
3:37 pm CST Feb 7, 2026
Forecast Valid:
3pm CST Feb 7, 2026-6pm CST Feb 13, 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