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

23°C

74°F

Humidity 85%
Wind Speed SW 6 km/h
Barometer 1016.7 mb (30.04 in)
Dewpoint 21°C (69°F)
Visibility 16 km
Last update 3 Jul 6:54 am CDT
Extended Forecast for

3 Miles WSW Forsyth IL

  • Today

    Today: Sunny, with a high near 32. West southwest wind 3 to 8 km/h.

    High: 32 °C

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 21. Calm wind.

    Low: 21 °C

    Mostly Clear

  • Independence Day

    Independence Day: Sunny, with a high near 33. South wind 8 to 13 km/h.

    High: 33 °C

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 22. South wind around 10 km/h.

    Low: 22 °C

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 33. South southwest wind 11 to 18 km/h, with gusts as high as 26 km/h.

    High: 33 °C

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 23. South southwest wind 11 to 14 km/h.

    Low: 23 °C

    Partly Cloudy

  • Sunday

    Sunday: A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 31. West wind 13 to 18 km/h, with gusts as high as 26 km/h.

    High: 31 °C

    Mostly Sunny
    then Chance
    T-storms

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 21.

    Low: 21 °C

    Partly Cloudy

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 30. Chance of precipitation is 30%.

    High: 30 °C

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 32. West southwest wind 3 to 8 km/h.
Tonight
Mostly clear, with a low around 21. Calm wind.
Independence Day
Sunny, with a high near 33. South wind 8 to 13 km/h.
Friday Night
Mostly clear, with a low around 22. South wind around 10 km/h.
Saturday
Sunny, with a high near 33. South southwest wind 11 to 18 km/h, with gusts as high as 26 km/h.
Saturday Night
Partly cloudy, with a low around 23. South southwest wind 11 to 14 km/h.
Sunday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 31. West wind 13 to 18 km/h, with gusts as high as 26 km/h.
Sunday Night
Partly cloudy, with a low around 21.
Monday
A chance of showers, with thunderstorms also possible after 1pm. Mostly sunny, with a high near 30. Chance of precipitation is 30%.
Monday Night
Partly cloudy, with a low around 20.
Tuesday
A chance of showers. Mostly sunny, with a high near 31.
Tuesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 20.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 30.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW Forsyth IL
 39.89°N 89.02°W (Elev. 656 m)
Last Update:
6:41 am CDT Jul 3, 2025
Forecast Valid:
7am CDT Jul 3, 2025-6pm CDT Jul 9, 2025
 
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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