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.

Partly Cloudy and Breezy

79°F

26°C

Humidity 49%
Wind Speed SW 23 G 40 mph
Barometer 29.84 in (1009.7 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 31 Mar 2:54 pm CDT
Extended Forecast for

Forsyth IL

  • This Afternoon

    This Afternoon: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 81. Breezy, with a southwest wind around 20 mph, with gusts as high as 31 mph.

    High: 81 °F

    Chance
    T-storms and
    Breezy

  • Tonight

    Tonight: Showers and thunderstorms, mainly before 10pm, then showers and possibly a thunderstorm after 10pm. Low around 45. Southwest wind 9 to 15 mph becoming northeast after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 45 °F

    T-storms

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 58. East northeast wind 14 to 17 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 58 °F

    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a temperature rising to around 61 by 5am. East wind 14 to 18 mph becoming south after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 50%.

    Low: 55 °F⇑

    Chance
    T-storms then
    Chance
    Showers

  • Thursday

    Thursday: A chance of showers, then showers and possibly a thunderstorm after 1pm. High near 74. Windy, with a south wind 22 to 30 mph, with gusts as high as 41 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 74 °F

    Chance
    Showers and
    Breezy then
    Showers and
    Windy

  • Thursday Night

    Thursday Night: Showers likely, mainly before 1am. Partly cloudy, with a low around 55. Breezy, with a southwest wind 18 to 23 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 32 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 55 °F

    Showers
    Likely and
    Breezy

  • Friday

    Friday: A 50 percent chance of showers after 1pm. Partly sunny, with a high near 77. South wind 9 to 16 mph, with gusts as high as 23 mph.

    High: 77 °F

    Partly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm. Low around 52. Breezy. Chance of precipitation is 90%.

    Low: 52 °F

    Showers and
    Breezy

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers. Mostly cloudy, with a high near 64. Breezy. Chance of precipitation is 70%.

    High: 64 °F

    Showers
    Likely and
    Breezy

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 81. Breezy, with a southwest wind around 20 mph, with gusts as high as 31 mph.
Tonight
Showers and thunderstorms, mainly before 10pm, then showers and possibly a thunderstorm after 10pm. Low around 45. Southwest wind 9 to 15 mph becoming northeast after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday
Showers and possibly a thunderstorm. High near 58. East northeast wind 14 to 17 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a temperature rising to around 61 by 5am. East wind 14 to 18 mph becoming south after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 50%.
Thursday
A chance of showers, then showers and possibly a thunderstorm after 1pm. High near 74. Windy, with a south wind 22 to 30 mph, with gusts as high as 41 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers likely, mainly before 1am. Partly cloudy, with a low around 55. Breezy, with a southwest wind 18 to 23 mph decreasing to 10 to 15 mph after midnight. Winds could gust as high as 32 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday
A 50 percent chance of showers after 1pm. Partly sunny, with a high near 77. South wind 9 to 16 mph, with gusts as high as 23 mph.
Friday Night
Showers and possibly a thunderstorm. Low around 52. Breezy. Chance of precipitation is 90%.
Saturday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers. Mostly cloudy, with a high near 64. Breezy. Chance of precipitation is 70%.
Saturday Night
A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 33. Breezy.
Sunday
Partly sunny, with a high near 50. Breezy.
Sunday Night
Mostly clear, with a low around 31.
Monday
Sunny, with a high near 59.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Forsyth IL
 39.93°N 88.96°W (Elev. 650 ft)
Last Update:
3:36 pm CDT Mar 31, 2026
Forecast Valid:
3pm CDT Mar 31, 2026-6pm CDT Apr 6, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

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