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

27°F

-3°C

Humidity 45%
Wind Speed NW 21 G 35 mph
Barometer 30.38 in (1029.9 mb)
Dewpoint 8°F (-13°C)
Visibility 10.00 mi
Wind Chill13°F (-11°C)
Last update 22 Feb 2:54 pm CST
Extended Forecast for

4 Miles N Forsyth IL

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 27. Blustery, with a northwest wind 20 to 22 mph, with gusts as high as 33 mph.

    High: 27 °F

    Mostly Cloudy
    and Blustery

  • Tonight

    Tonight: Mostly cloudy, with a low around 15. Wind chill values between 1 and 8. Blustery, with a northwest wind 15 to 20 mph, with gusts as high as 30 mph.

    Low: 15 °F

    Mostly Cloudy
    and Blustery
    then Mostly
    Cloudy

  • Monday

    Monday: Partly sunny, then gradually becoming sunny, with a high near 30. Wind chill values between zero and 10. North northwest wind 8 to 16 mph, with gusts as high as 24 mph.

    High: 30 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 18. Light and variable wind becoming south 5 to 10 mph after midnight. Winds could gust as high as 17 mph.

    Low: 18 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 46. Breezy, with a south wind 13 to 23 mph, with gusts as high as 32 mph.

    High: 46 °F

    Mostly Cloudy
    and Breezy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 28. South southwest wind 10 to 15 mph becoming west northwest after midnight. Winds could gust as high as 23 mph.

    Low: 28 °F

    Decreasing
    Clouds

  • Wednesday

    Wednesday: Mostly sunny, with a high near 47. West northwest wind 8 to 10 mph becoming south southeast in the afternoon. Winds could gust as high as 16 mph.

    High: 47 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Rain likely. Mostly cloudy, with a low around 29. Chance of precipitation is 70%.

    Low: 29 °F

    Rain Likely

  • Thursday

    Thursday: A chance of rain and snow before noon. Partly sunny, with a high near 43. Chance of precipitation is 30%.

    High: 43 °F

    Chance
    Rain/Snow
    then Mostly
    Sunny

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 27. Blustery, with a northwest wind 20 to 22 mph, with gusts as high as 33 mph.
Tonight
Mostly cloudy, with a low around 15. Wind chill values between 1 and 8. Blustery, with a northwest wind 15 to 20 mph, with gusts as high as 30 mph.
Monday
Partly sunny, then gradually becoming sunny, with a high near 30. Wind chill values between zero and 10. North northwest wind 8 to 16 mph, with gusts as high as 24 mph.
Monday Night
Increasing clouds, with a low around 18. Light and variable wind becoming south 5 to 10 mph after midnight. Winds could gust as high as 17 mph.
Tuesday
Mostly cloudy, with a high near 46. Breezy, with a south wind 13 to 23 mph, with gusts as high as 32 mph.
Tuesday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 28. South southwest wind 10 to 15 mph becoming west northwest after midnight. Winds could gust as high as 23 mph.
Wednesday
Mostly sunny, with a high near 47. West northwest wind 8 to 10 mph becoming south southeast in the afternoon. Winds could gust as high as 16 mph.
Wednesday Night
Rain likely. Mostly cloudy, with a low around 29. Chance of precipitation is 70%.
Thursday
A chance of rain and snow before noon. Partly sunny, with a high near 43. Chance of precipitation is 30%.
Thursday Night
Mostly clear, with a low around 24.
Friday
Sunny, with a high near 56.
Friday Night
Mostly clear, with a low around 35.
Saturday
Mostly sunny, with a high near 57.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles N Forsyth IL
 39.97°N 88.96°W (Elev. 679 ft)
Last Update:
3:16 pm CST Feb 22, 2026
Forecast Valid:
3pm CST Feb 22, 2026-6pm CST Feb 28, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation