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

52°F

11°C

Humidity 40%
Wind Speed S 12 G 21 mph
Barometer 30.45 in (1031.4 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill48°F (9°C)
Last update 28 Mar 4:54 pm CDT
Extended Forecast for

3 Miles WSW Forsyth IL

  • Tonight

    Tonight: Partly cloudy, with a low around 38. South wind 8 to 11 mph, with gusts as high as 20 mph.

    Low: 38 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 64. South southwest wind 13 to 17 mph, with gusts as high as 26 mph.

    High: 64 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 53. South wind around 15 mph, with gusts as high as 23 mph.

    Low: 53 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 79. Breezy, with a south southwest wind 15 to 21 mph, with gusts as high as 31 mph.

    High: 79 °F

    Mostly Sunny
    then Sunny
    and Breezy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 63. Breezy, with a south wind 18 to 22 mph, with gusts as high as 31 mph.

    Low: 63 °F

    Partly Cloudy
    and Breezy

  • Tuesday

    Tuesday: Showers and thunderstorms likely after 1pm. Partly sunny, with a high near 80. Breezy, with a south southwest wind 22 to 26 mph, with gusts as high as 36 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 80 °F

    Breezy.
    Partly Sunny
    then T-storms
    Likely

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm before 1am, then showers likely. Low around 41. Breezy, with a west wind 17 to 20 mph becoming north after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.

    Low: 41 °F

    T-storms and
    Breezy

  • Wednesday

    Wednesday: A 40 percent chance of showers. Mostly cloudy, with a high near 51. Breezy.

    High: 51 °F

    Chance
    Showers and
    Breezy

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 37. Breezy.

    Low: 37 °F

    Chance
    Showers and
    Breezy

Detailed Forecast

Tonight
Partly cloudy, with a low around 38. South wind 8 to 11 mph, with gusts as high as 20 mph.
Sunday
Mostly sunny, with a high near 64. South southwest wind 13 to 17 mph, with gusts as high as 26 mph.
Sunday Night
Partly cloudy, with a low around 53. South wind around 15 mph, with gusts as high as 23 mph.
Monday
Mostly sunny, with a high near 79. Breezy, with a south southwest wind 15 to 21 mph, with gusts as high as 31 mph.
Monday Night
Partly cloudy, with a low around 63. Breezy, with a south wind 18 to 22 mph, with gusts as high as 31 mph.
Tuesday
Showers and thunderstorms likely after 1pm. Partly sunny, with a high near 80. Breezy, with a south southwest wind 22 to 26 mph, with gusts as high as 36 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
Showers and possibly a thunderstorm before 1am, then showers likely. Low around 41. Breezy, with a west wind 17 to 20 mph becoming north after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.
Wednesday
A 40 percent chance of showers. Mostly cloudy, with a high near 51. Breezy.
Wednesday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 37. Breezy.
Thursday
A 50 percent chance of showers. Mostly cloudy, with a high near 51. Breezy.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 40.
Friday
A chance of showers. Mostly cloudy, with a high near 67.
Friday Night
A chance of showers. Mostly cloudy, with a low around 50.
Saturday
Showers likely. Mostly cloudy, with a high near 66. Breezy.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW Forsyth IL
 39.89°N 89.02°W (Elev. 656 ft)
Last Update:
2:57 pm CDT Mar 28, 2026
Forecast Valid:
5pm CDT Mar 28, 2026-6pm CDT Apr 4, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation