National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fair

77°F

25°C

Humidity 35%
Wind Speed SW 15 G 30 mph
Barometer 30.15 in (1020.7 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 9 Apr 1:54 pm CDT
Extended Forecast for

Forsyth IL

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 79. Southwest wind around 15 mph, with gusts as high as 24 mph.

    High: 79 °F

    Mostly Sunny

  • Tonight

    Tonight: A slight chance of showers between 2am and 4am, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 55. South wind 13 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 30%.

    Low: 55 °F

    Mostly Cloudy
    then Chance
    Showers

  • Friday

    Friday: Showers and thunderstorms before 1pm, then a chance of showers. High near 64. West southwest wind 11 to 14 mph becoming north in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 64 °F

    Showers then
    Chance
    Showers

  • Friday Night

    Friday Night: Partly cloudy, with a low around 42. East northeast wind 8 to 10 mph, with gusts as high as 16 mph.

    Low: 42 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 66. East southeast wind around 11 mph, with gusts as high as 17 mph.

    High: 66 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 57. Southeast wind 10 to 14 mph, with gusts as high as 22 mph.

    Low: 57 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 77. Breezy, with a south southwest wind 15 to 25 mph, with gusts as high as 36 mph.

    High: 77 °F

    Mostly Cloudy
    and Breezy

  • Sunday Night

    Sunday Night: Showers likely, mainly after 1am. Mostly cloudy, with a low around 62. Breezy. Chance of precipitation is 60%.

    Low: 62 °F

    Showers
    Likely and
    Breezy

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 80. Breezy. Chance of precipitation is 40%.

    High: 80 °F

    Chance
    Showers then
    Chance
    T-storms and
    Breezy

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 79. Southwest wind around 15 mph, with gusts as high as 24 mph.
Tonight
A slight chance of showers between 2am and 4am, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 55. South wind 13 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 30%.
Friday
Showers and thunderstorms before 1pm, then a chance of showers. High near 64. West southwest wind 11 to 14 mph becoming north in the afternoon. Winds could gust as high as 22 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
Partly cloudy, with a low around 42. East northeast wind 8 to 10 mph, with gusts as high as 16 mph.
Saturday
Partly sunny, with a high near 66. East southeast wind around 11 mph, with gusts as high as 17 mph.
Saturday Night
Mostly cloudy, with a low around 57. Southeast wind 10 to 14 mph, with gusts as high as 22 mph.
Sunday
Mostly cloudy, with a high near 77. Breezy, with a south southwest wind 15 to 25 mph, with gusts as high as 36 mph.
Sunday Night
Showers likely, mainly after 1am. Mostly cloudy, with a low around 62. Breezy. Chance of precipitation is 60%.
Monday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 80. Breezy. Chance of precipitation is 40%.
Monday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 65.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 83. Breezy.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 63.
Wednesday
A chance of showers. Mostly cloudy, with a high near 78. Breezy.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Forsyth IL
 39.93°N 88.96°W (Elev. 650 ft)
Last Update:
1:46 pm CDT Apr 9, 2026
Forecast Valid:
2pm CDT Apr 9, 2026-6pm CDT Apr 15, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation