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

74°F

23°C

Humidity 94%
Wind Speed S 5 mph
Barometer 29.92 in (1012.6 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 16 Jul 10:54 pm CDT
Extended Forecast for

Forsyth IL

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly after 5am. Mostly cloudy, with a low around 71. West southwest wind 5 to 7 mph.

    Low: 71 °F

    Chance
    T-storms

  • Thursday

    Thursday: A slight chance of showers and thunderstorms before 1pm, then a slight chance of showers and thunderstorms after 4pm. Mostly cloudy, with a high near 81. North northwest wind 6 to 8 mph. Chance of precipitation is 20%.

    High: 81 °F

    Slight Chance
    T-storms

  • Thursday Night

    Thursday Night: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65. North wind 6 to 8 mph becoming east northeast after midnight.

    Low: 65 °F

    Slight Chance
    T-storms

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 83. East northeast wind 5 to 8 mph becoming south southeast in the afternoon.

    High: 83 °F

    Partly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 71. South southeast wind around 6 mph.

    Low: 71 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Saturday

    Saturday: Showers and thunderstorms likely. Partly sunny, with a high near 88. Southwest wind 7 to 9 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 88 °F

    T-storms
    Likely

  • Saturday Night

    Saturday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72. South southwest wind around 6 mph.

    Low: 72 °F

    Chance
    T-storms

  • Sunday

    Sunday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 86.

    High: 86 °F

    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71.

    Low: 71 °F

    Chance
    T-storms

Detailed Forecast

Tonight
A 30 percent chance of showers and thunderstorms, mainly after 5am. Mostly cloudy, with a low around 71. West southwest wind 5 to 7 mph.
Thursday
A slight chance of showers and thunderstorms before 1pm, then a slight chance of showers and thunderstorms after 4pm. Mostly cloudy, with a high near 81. North northwest wind 6 to 8 mph. Chance of precipitation is 20%.
Thursday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65. North wind 6 to 8 mph becoming east northeast after midnight.
Friday
A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 83. East northeast wind 5 to 8 mph becoming south southeast in the afternoon.
Friday Night
A 40 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 71. South southeast wind around 6 mph.
Saturday
Showers and thunderstorms likely. Partly sunny, with a high near 88. Southwest wind 7 to 9 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72. South southwest wind around 6 mph.
Sunday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 86.
Sunday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71.
Monday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 87.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 74.
Tuesday
Mostly sunny, with a high near 91.
Tuesday Night
Mostly clear, with a low around 75.
Wednesday
Sunny, with a high near 93.
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:
10:41 pm CDT Jul 16, 2025
Forecast Valid:
11pm CDT Jul 16, 2025-6pm CDT Jul 23, 2025
 
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