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

81°F

27°C

Humidity 27%
Wind Speed E 12 mph
Barometer 30.08 in (1018.0 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 25 May 4:54 pm CDT
Extended Forecast for

3 Miles WSW Forsyth IL

  • Tonight

    Tonight: Partly cloudy, with a low around 58. East southeast wind 3 to 8 mph.

    Low: 58 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 80. East southeast wind around 6 mph.

    High: 80 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 62. East wind 3 to 5 mph.

    Low: 62 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 81. East wind 3 to 7 mph. Chance of precipitation is 40%.

    High: 81 °F

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 61. East northeast wind 5 to 7 mph.

    Low: 61 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 82. East northeast wind 10 to 13 mph, with gusts as high as 17 mph.

    High: 82 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 58. East northeast wind around 10 mph, with gusts as high as 16 mph.

    Low: 58 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 77.

    High: 77 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 57.

    Low: 57 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 58. East southeast wind 3 to 8 mph.
Tuesday
Increasing clouds, with a high near 80. East southeast wind around 6 mph.
Tuesday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 62. East wind 3 to 5 mph.
Wednesday
A chance of showers, with thunderstorms also possible after 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 81. East wind 3 to 7 mph. Chance of precipitation is 40%.
Wednesday Night
Mostly clear, with a low around 61. East northeast wind 5 to 7 mph.
Thursday
Mostly sunny, with a high near 82. East northeast wind 10 to 13 mph, with gusts as high as 17 mph.
Thursday Night
Partly cloudy, with a low around 58. East northeast wind around 10 mph, with gusts as high as 16 mph.
Friday
Partly sunny, with a high near 77.
Friday Night
Mostly cloudy, with a low around 57.
Saturday
Mostly sunny, with a high near 76.
Saturday Night
Partly cloudy, with a low around 56.
Sunday
Sunny, with a high near 77.
Sunday Night
Mostly clear, with a low around 54.
Monday
Sunny, with a high near 79.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW Forsyth IL
 39.89°N 89.02°W (Elev. 656 ft)
Last Update:
1:36 pm CDT May 25, 2026
Forecast Valid:
5pm CDT May 25, 2026-6pm CDT Jun 1, 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