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.

Overcast

60°F

16°C

Humidity 52%
Wind Speed S 18 G 29 mph
Barometer 30.01 in (1016.0 mb)
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Last update 30 Mar 6:54 am CDT
Extended Forecast for

Forsyth IL

  • Today

    Today: Mostly sunny, with a high near 79. Breezy, with a south southwest wind 15 to 22 mph, with gusts as high as 29 mph.

    High: 79 °F

    Mostly Sunny
    and Breezy

  • Tonight

    Tonight: Mostly cloudy, with a low around 62. Breezy, with a south southwest wind 16 to 20 mph, with gusts as high as 29 mph.

    Low: 62 °F

    Mostly Cloudy
    and Breezy

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 80. Breezy, with a south southwest wind 18 to 26 mph, with gusts as high as 37 mph.

    High: 80 °F

    Breezy.
    Slight Chance
    T-storms then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Rain and possibly a thunderstorm. Low around 49. Southwest wind 14 to 16 mph becoming north northeast after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 49 °F

    Rain

  • Wednesday

    Wednesday: Rain, with thunderstorms also possible after 4pm. High near 62. Northeast wind 15 to 17 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 62 °F

    Rain

  • Wednesday Night

    Wednesday Night: Rain and possibly a thunderstorm. Low around 53. East northeast wind 15 to 17 mph becoming south after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 53 °F

    Rain

  • Thursday

    Thursday: Rain and possibly a thunderstorm. High near 71. Breezy, with a south southwest wind 18 to 24 mph, with gusts as high as 33 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 71 °F

    Rain and
    Breezy

  • Thursday Night

    Thursday Night: Rain. Low around 54. Breezy. Chance of precipitation is 80%.

    Low: 54 °F

    Rain and
    Breezy

  • Friday

    Friday: A 40 percent chance of rain. Mostly cloudy, with a high near 73.

    High: 73 °F

    Chance Rain

Detailed Forecast

Today
Mostly sunny, with a high near 79. Breezy, with a south southwest wind 15 to 22 mph, with gusts as high as 29 mph.
Tonight
Mostly cloudy, with a low around 62. Breezy, with a south southwest wind 16 to 20 mph, with gusts as high as 29 mph.
Tuesday
A 50 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 80. Breezy, with a south southwest wind 18 to 26 mph, with gusts as high as 37 mph.
Tuesday Night
Rain and possibly a thunderstorm. Low around 49. Southwest wind 14 to 16 mph becoming north northeast after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday
Rain, with thunderstorms also possible after 4pm. High near 62. Northeast wind 15 to 17 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
Rain and possibly a thunderstorm. Low around 53. East northeast wind 15 to 17 mph becoming south after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday
Rain and possibly a thunderstorm. High near 71. Breezy, with a south southwest wind 18 to 24 mph, with gusts as high as 33 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday Night
Rain. Low around 54. Breezy. Chance of precipitation is 80%.
Friday
A 40 percent chance of rain. Mostly cloudy, with a high near 73.
Friday Night
Rain likely, mainly after 1am. Mostly cloudy, with a low around 54. Chance of precipitation is 60%.
Saturday
Rain likely. Mostly cloudy, with a high near 67. Breezy.
Saturday Night
A chance of rain. Mostly cloudy, with a low around 39. Breezy.
Sunday
Partly sunny, with a high near 54. 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:
6:12 am CDT Mar 30, 2026
Forecast Valid:
7am CDT Mar 30, 2026-6pm CDT Apr 5, 2026
 
Forecast Discussion
 
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Additional Resources

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Link to Local Radar Data Link to Satellite Data

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