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

25°F

-4°C

Humidity 75%
Wind Speed N 9 mph
Barometer 30.26 in (1025.5 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Wind Chill16°F (-9°C)
Last update 3 Feb 6:54 pm CST
Extended Forecast for

Forsyth IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 12. Wind chill values between 4 and 9. Northeast wind around 7 mph.

    Low: 12 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 26. Wind chill values between 1 and 11. North northeast wind 6 to 8 mph.

    High: 26 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 9. Wind chill values between -1 and 4. Calm wind becoming southwest around 6 mph after midnight.

    Low: 9 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 32. Wind chill values between zero and 10. South southwest wind 6 to 14 mph, with gusts as high as 20 mph.

    High: 32 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 26. South wind 9 to 15 mph becoming west after midnight. Winds could gust as high as 25 mph.

    Low: 26 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 41. Breezy, with a northwest wind 14 to 20 mph, with gusts as high as 30 mph.

    High: 41 °F

    Mostly Sunny
    and Breezy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 17. North northwest wind 6 to 13 mph becoming northeast after midnight. Winds could gust as high as 23 mph.

    Low: 17 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 33.

    High: 33 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 23.

    Low: 23 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 12. Wind chill values between 4 and 9. Northeast wind around 7 mph.
Wednesday
Partly sunny, with a high near 26. Wind chill values between 1 and 11. North northeast wind 6 to 8 mph.
Wednesday Night
Partly cloudy, with a low around 9. Wind chill values between -1 and 4. Calm wind becoming southwest around 6 mph after midnight.
Thursday
Mostly cloudy, with a high near 32. Wind chill values between zero and 10. South southwest wind 6 to 14 mph, with gusts as high as 20 mph.
Thursday Night
Partly cloudy, with a low around 26. South wind 9 to 15 mph becoming west after midnight. Winds could gust as high as 25 mph.
Friday
Mostly sunny, with a high near 41. Breezy, with a northwest wind 14 to 20 mph, with gusts as high as 30 mph.
Friday Night
Partly cloudy, with a low around 17. North northwest wind 6 to 13 mph becoming northeast after midnight. Winds could gust as high as 23 mph.
Saturday
Sunny, with a high near 33.
Saturday Night
Mostly cloudy, with a low around 23.
Sunday
Partly sunny, with a high near 37.
Sunday Night
Partly cloudy, with a low around 19.
Monday
Mostly sunny, with a high near 41.
Monday Night
Mostly cloudy, with a low around 28.
Tuesday
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:
6:36 pm CST Feb 3, 2026
Forecast Valid:
7pm CST Feb 3, 2026-6pm CST Feb 10, 2026
 
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Additional Resources

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