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

31°F

-1°C

Humidity 82%
Wind Speed N 13 mph
Barometer 30.26 in (1025.0 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill21°F (-6°C)
Last update 23 Mar 4:54 am CDT
Extended Forecast for

4 Miles N Forsyth IL

  • Today

    Today: Mostly sunny, with a high near 50. North wind 11 to 14 mph, with gusts as high as 22 mph.

    High: 50 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 32. Northeast wind around 9 mph becoming east southeast after midnight. Winds could gust as high as 17 mph.

    Low: 32 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 58. South wind 7 to 11 mph, with gusts as high as 16 mph.

    High: 58 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 38. South southeast wind 7 to 9 mph.

    Low: 38 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 71. South southwest wind 8 to 15 mph, with gusts as high as 20 mph.

    High: 71 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 55. South wind 11 to 13 mph, with gusts as high as 18 mph.

    Low: 55 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 84. Southwest wind 11 to 18 mph, with gusts as high as 25 mph.

    High: 84 °F

    Sunny then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: Rain and possibly a thunderstorm before 1am, then a chance of rain. Low around 36. Breezy. Chance of precipitation is 80%.

    Low: 36 °F

    Rain and
    Breezy

  • Friday

    Friday: Partly sunny, with a high near 47. Breezy.

    High: 47 °F

    Partly Sunny
    and Breezy

Detailed Forecast

Today
Mostly sunny, with a high near 50. North wind 11 to 14 mph, with gusts as high as 22 mph.
Tonight
Mostly cloudy, with a low around 32. Northeast wind around 9 mph becoming east southeast after midnight. Winds could gust as high as 17 mph.
Tuesday
Mostly sunny, with a high near 58. South wind 7 to 11 mph, with gusts as high as 16 mph.
Tuesday Night
Partly cloudy, with a low around 38. South southeast wind 7 to 9 mph.
Wednesday
Partly sunny, with a high near 71. South southwest wind 8 to 15 mph, with gusts as high as 20 mph.
Wednesday Night
Mostly cloudy, with a low around 55. South wind 11 to 13 mph, with gusts as high as 18 mph.
Thursday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 84. Southwest wind 11 to 18 mph, with gusts as high as 25 mph.
Thursday Night
Rain and possibly a thunderstorm before 1am, then a chance of rain. Low around 36. Breezy. Chance of precipitation is 80%.
Friday
Partly sunny, with a high near 47. Breezy.
Friday Night
Mostly clear, with a low around 28.
Saturday
Sunny, with a high near 54.
Saturday Night
Partly cloudy, with a low around 34.
Sunday
Partly sunny, with a high near 60.
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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:
4:36 am CDT Mar 23, 2026
Forecast Valid:
5am CDT Mar 23, 2026-6pm CDT Mar 29, 2026
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation