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

43°F

6°C

Humidity 56%
Wind Speed S 8 mph
Barometer 30.06 in (1018.4 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 9 Feb 2:54 pm CST
Extended Forecast for

Forsyth IL

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 43. South wind around 8 mph.

    High: 43 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 33. South wind 8 to 13 mph, with gusts as high as 21 mph.

    Low: 33 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 52. Southwest wind 9 to 14 mph becoming north northwest in the afternoon. Winds could gust as high as 22 mph.

    High: 52 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 25. North northwest wind 8 to 10 mph, with gusts as high as 17 mph.

    Low: 25 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 44. North northwest wind 7 to 10 mph, with gusts as high as 15 mph.

    High: 44 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 27. Northwest wind around 6 mph becoming light and variable.

    Low: 27 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Cloudy, with a high near 42. East southeast wind 5 to 7 mph.

    High: 42 °F

    Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 27.

    Low: 27 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 43.

    High: 43 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 43. South wind around 8 mph.
Tonight
Partly cloudy, with a low around 33. South wind 8 to 13 mph, with gusts as high as 21 mph.
Tuesday
Mostly sunny, with a high near 52. Southwest wind 9 to 14 mph becoming north northwest in the afternoon. Winds could gust as high as 22 mph.
Tuesday Night
Mostly clear, with a low around 25. North northwest wind 8 to 10 mph, with gusts as high as 17 mph.
Wednesday
Sunny, with a high near 44. North northwest wind 7 to 10 mph, with gusts as high as 15 mph.
Wednesday Night
Increasing clouds, with a low around 27. Northwest wind around 6 mph becoming light and variable.
Thursday
Cloudy, with a high near 42. East southeast wind 5 to 7 mph.
Thursday Night
Mostly cloudy, with a low around 27.
Friday
Partly sunny, with a high near 43.
Friday Night
Mostly cloudy, with a low around 29.
Saturday
A chance of rain. Cloudy, with a high near 44.
Saturday Night
Rain likely. Mostly cloudy, with a low around 33.
Sunday
A chance of rain. Partly sunny, with a high near 47.
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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:
3:16 pm CST Feb 9, 2026
Forecast Valid:
3pm CST Feb 9, 2026-6pm CST Feb 15, 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