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

71°F

22°C

Humidity 38%
Wind Speed NW 7 mph
Barometer 29.88 in (1011.7 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 20 Mar 7:54 pm CDT
Extended Forecast for

4 Miles N Forsyth IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 45. North northwest wind around 8 mph becoming east after midnight. Winds could gust as high as 15 mph.

    Low: 45 °F

    Mostly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 77. East wind 6 to 11 mph becoming southwest in the afternoon. Winds could gust as high as 15 mph.

    High: 77 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 59. South southwest wind 8 to 14 mph, with gusts as high as 22 mph.

    Low: 59 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 80. Breezy, with a south southwest wind 13 to 21 mph becoming north in the afternoon. Winds could gust as high as 28 mph.

    High: 80 °F

    Mostly Sunny
    then Partly
    Sunny and
    Breezy

  • Sunday Night

    Sunday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 35. Breezy, with a north wind 15 to 22 mph, with gusts as high as 30 mph.

    Low: 35 °F

    Mostly Cloudy
    and Breezy
    then Mostly
    Clear

  • Monday

    Monday: Sunny, with a high near 52. North wind 10 to 14 mph, with gusts as high as 20 mph.

    High: 52 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 36. Northeast wind around 8 mph becoming southeast after midnight.

    Low: 36 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 59.

    High: 59 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 39.

    Low: 39 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 45. North northwest wind around 8 mph becoming east after midnight. Winds could gust as high as 15 mph.
Saturday
Sunny, with a high near 77. East wind 6 to 11 mph becoming southwest in the afternoon. Winds could gust as high as 15 mph.
Saturday Night
Mostly clear, with a low around 59. South southwest wind 8 to 14 mph, with gusts as high as 22 mph.
Sunday
Partly sunny, with a high near 80. Breezy, with a south southwest wind 13 to 21 mph becoming north in the afternoon. Winds could gust as high as 28 mph.
Sunday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 35. Breezy, with a north wind 15 to 22 mph, with gusts as high as 30 mph.
Monday
Sunny, with a high near 52. North wind 10 to 14 mph, with gusts as high as 20 mph.
Monday Night
Mostly cloudy, with a low around 36. Northeast wind around 8 mph becoming southeast after midnight.
Tuesday
Partly sunny, with a high near 59.
Tuesday Night
Partly cloudy, with a low around 39.
Wednesday
Mostly cloudy, with a high near 60.
Wednesday Night
Mostly cloudy, with a low around 47.
Thursday
Mostly sunny, with a high near 75. Breezy.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 36.
Friday
Partly sunny, with a high near 48.
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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:
7:36 pm CDT Mar 20, 2026
Forecast Valid:
8pm CDT Mar 20, 2026-6pm CDT Mar 27, 2026
 
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