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

49°F

9°C

Humidity 52%
Wind Speed SW 15 mph
Barometer 30.01 in (1016.8 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill43°F (6°C)
Last update 18 Mar 12:54 pm CDT
Extended Forecast for

4 Miles N Forsyth IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 54. West southwest wind 10 to 13 mph, with gusts as high as 17 mph.

    High: 54 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 37. West wind around 6 mph becoming light and variable.

    Low: 37 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 64. South southeast wind around 7 mph becoming north northeast in the afternoon.

    High: 64 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 43. Northeast wind around 6 mph becoming south southeast after midnight.

    Low: 43 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 72. South wind 6 to 13 mph becoming west southwest in the afternoon. Winds could gust as high as 18 mph.

    High: 72 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 47. West southwest wind 7 to 9 mph becoming north after midnight.

    Low: 47 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 74. North northeast wind 7 to 10 mph becoming south southwest in the morning. Winds could gust as high as 15 mph.

    High: 74 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 51.

    Low: 51 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 71. Breezy.

    High: 71 °F

    Mostly Sunny
    and Breezy

Detailed Forecast

This Afternoon
Sunny, with a high near 54. West southwest wind 10 to 13 mph, with gusts as high as 17 mph.
Tonight
Increasing clouds, with a low around 37. West wind around 6 mph becoming light and variable.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 64. South southeast wind around 7 mph becoming north northeast in the afternoon.
Thursday Night
Partly cloudy, with a low around 43. Northeast wind around 6 mph becoming south southeast after midnight.
Friday
Partly sunny, with a high near 72. South wind 6 to 13 mph becoming west southwest in the afternoon. Winds could gust as high as 18 mph.
Friday Night
Mostly cloudy, with a low around 47. West southwest wind 7 to 9 mph becoming north after midnight.
Saturday
Mostly sunny, with a high near 74. North northeast wind 7 to 10 mph becoming south southwest in the morning. Winds could gust as high as 15 mph.
Saturday Night
Mostly clear, with a low around 51.
Sunday
Mostly sunny, with a high near 71. Breezy.
Sunday Night
Mostly cloudy, with a low around 32.
Monday
Mostly cloudy, with a high near 49.
Monday Night
Mostly cloudy, with a low around 31.
Tuesday
Mostly sunny, with a high near 55.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles N Forsyth IL
 39.97°N 88.96°W (Elev. 679 ft)
Last Update:
12:36 pm CDT Mar 18, 2026
Forecast Valid:
1pm CDT Mar 18, 2026-6pm CDT Mar 24, 2026
 
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Additional Resources

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