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 and Breezy

23°F

-5°C

Humidity 55%
Wind Speed NW 21 G 31 mph
Barometer 30.38 in (1029.8 mb)
Dewpoint 9°F (-13°C)
Visibility 10.00 mi
Wind Chill8°F (-13°C)
Last update 22 Feb 10:54 am CST
Extended Forecast for

Forsyth IL

  • Today

    Today: Partly sunny, with a high near 27. Blustery, with a northwest wind 21 to 23 mph, with gusts as high as 34 mph.

    High: 27 °F

    Partly Sunny
    and Blustery

  • Tonight

    Tonight: Mostly cloudy, with a low around 14. Wind chill values between -3 and 7. Blustery, with a northwest wind 17 to 20 mph, with gusts as high as 30 mph.

    Low: 14 °F

    Mostly Cloudy
    and Blustery
    then Mostly
    Cloudy

  • Monday

    Monday: Partly sunny, then gradually becoming sunny, with a high near 31. Wind chill values between -1 and 9. Northwest wind 8 to 18 mph, with gusts as high as 28 mph.

    High: 31 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 17. Light and variable wind becoming south 5 to 9 mph after midnight. Winds could gust as high as 15 mph.

    Low: 17 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 47. Breezy, with a south wind 11 to 16 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 32 mph.

    High: 47 °F

    Mostly Cloudy
    and Breezy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 30. South southwest wind 11 to 14 mph becoming west after midnight. Winds could gust as high as 22 mph.

    Low: 30 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 49. West wind 9 to 13 mph, with gusts as high as 17 mph.

    High: 49 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Rain likely, mainly after midnight. Mostly cloudy, with a low around 30. Chance of precipitation is 60%.

    Low: 30 °F

    Rain Likely

  • Thursday

    Thursday: A 40 percent chance of rain before noon. Partly sunny, with a high near 44.

    High: 44 °F

    Chance Rain
    then Partly
    Sunny

Detailed Forecast

Today
Partly sunny, with a high near 27. Blustery, with a northwest wind 21 to 23 mph, with gusts as high as 34 mph.
Tonight
Mostly cloudy, with a low around 14. Wind chill values between -3 and 7. Blustery, with a northwest wind 17 to 20 mph, with gusts as high as 30 mph.
Monday
Partly sunny, then gradually becoming sunny, with a high near 31. Wind chill values between -1 and 9. Northwest wind 8 to 18 mph, with gusts as high as 28 mph.
Monday Night
Increasing clouds, with a low around 17. Light and variable wind becoming south 5 to 9 mph after midnight. Winds could gust as high as 15 mph.
Tuesday
Mostly cloudy, with a high near 47. Breezy, with a south wind 11 to 16 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 32 mph.
Tuesday Night
Mostly cloudy, with a low around 30. South southwest wind 11 to 14 mph becoming west after midnight. Winds could gust as high as 22 mph.
Wednesday
Mostly sunny, with a high near 49. West wind 9 to 13 mph, with gusts as high as 17 mph.
Wednesday Night
Rain likely, mainly after midnight. Mostly cloudy, with a low around 30. Chance of precipitation is 60%.
Thursday
A 40 percent chance of rain before noon. Partly sunny, with a high near 44.
Thursday Night
Partly cloudy, with a low around 25.
Friday
Sunny, with a high near 56.
Friday Night
Mostly clear, with a low around 37.
Saturday
Partly sunny, with a high near 56.
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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:
11:37 am CST Feb 22, 2026
Forecast Valid:
11am CST Feb 22, 2026-6pm CST Feb 28, 2026
 
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Additional Resources

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Chance of Precipitation