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.

Mostly Cloudy

34°F

1°C

Humidity 89%
Wind Speed SW 10 G 20 mph
Barometer 29.94 in (1014.2 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill26°F (-3°C)
Last update 31 Dec 8:54 pm CST
Extended Forecast for

3 Miles WSW Forsyth IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 21. West wind 9 to 11 mph becoming north northeast after midnight. Winds could gust as high as 20 mph.

    Low: 21 °F

    Mostly Cloudy

  • New Year's Day

    New Year's Day: Mostly sunny, with a high near 30. North northeast wind 5 to 9 mph becoming light and variable in the afternoon.

    High: 30 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 20. Light and variable wind.

    Low: 20 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 35. Calm wind becoming east northeast around 6 mph in the morning.

    High: 35 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 22. Northeast wind around 6 mph.

    Low: 22 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 35. Northeast wind around 6 mph becoming north northwest in the afternoon.

    High: 35 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 20. North northwest wind 3 to 5 mph.

    Low: 20 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 37.

    High: 37 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 29.

    Low: 29 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 21. West wind 9 to 11 mph becoming north northeast after midnight. Winds could gust as high as 20 mph.
New Year's Day
Mostly sunny, with a high near 30. North northeast wind 5 to 9 mph becoming light and variable in the afternoon.
Thursday Night
Partly cloudy, with a low around 20. Light and variable wind.
Friday
Partly sunny, with a high near 35. Calm wind becoming east northeast around 6 mph in the morning.
Friday Night
Mostly cloudy, with a low around 22. Northeast wind around 6 mph.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 35. Northeast wind around 6 mph becoming north northwest in the afternoon.
Saturday Night
Mostly clear, with a low around 20. North northwest wind 3 to 5 mph.
Sunday
Mostly sunny, with a high near 37.
Sunday Night
Mostly cloudy, with a low around 29.
Monday
Mostly sunny, with a high near 50.
Monday Night
Partly cloudy, with a low around 34.
Tuesday
Partly sunny, with a high near 53.
Tuesday Night
Mostly cloudy, with a low around 30.
Wednesday
Mostly sunny, with a high near 46.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW Forsyth IL
 39.89°N 89.02°W (Elev. 656 ft)
Last Update:
9:37 pm CST Dec 31, 2025
Forecast Valid:
9pm CST Dec 31, 2025-6pm CST Jan 7, 2026
 
Forecast Discussion
 
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Additional Resources

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