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Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Overcast

69°F

21°C

Humidity 70%
Wind Speed N 6 mph
Barometer 30.15 in (1020.8 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 15 Oct 4:54 pm CDT
Extended Forecast for

3 Miles WSW Forsyth IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 56. East wind 6 to 8 mph, with gusts as high as 15 mph.

    Low: 56 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 77. East southeast wind 8 to 10 mph, with gusts as high as 15 mph.

    High: 77 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 56. South southeast wind around 10 mph, with gusts as high as 16 mph.

    Low: 56 °F

    Increasing
    Clouds

  • Friday

    Friday: Partly sunny, with a high near 78. South wind 11 to 16 mph, with gusts as high as 21 mph.

    High: 78 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 61. South wind around 14 mph, with gusts as high as 18 mph.

    Low: 61 °F

    Partly Cloudy

  • Saturday

    Saturday: Showers, mainly after 1pm. High near 77. South wind 14 to 17 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 77 °F

    Chance
    Showers then
    Showers

  • Saturday Night

    Saturday Night: Showers, with thunderstorms also possible after 1am. Low around 48. Southwest wind 13 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.

    Low: 48 °F

    Showers

  • Sunday

    Sunday: A 40 percent chance of showers before 1pm. Mostly sunny, with a high near 61. Breezy.

    High: 61 °F

    Chance
    Showers and
    Breezy

  • Sunday Night

    Sunday Night: Clear, with a low around 40.

    Low: 40 °F

    Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 56. East wind 6 to 8 mph, with gusts as high as 15 mph.
Thursday
Mostly sunny, with a high near 77. East southeast wind 8 to 10 mph, with gusts as high as 15 mph.
Thursday Night
Increasing clouds, with a low around 56. South southeast wind around 10 mph, with gusts as high as 16 mph.
Friday
Partly sunny, with a high near 78. South wind 11 to 16 mph, with gusts as high as 21 mph.
Friday Night
Partly cloudy, with a low around 61. South wind around 14 mph, with gusts as high as 18 mph.
Saturday
Showers, mainly after 1pm. High near 77. South wind 14 to 17 mph, with gusts as high as 23 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Saturday Night
Showers, with thunderstorms also possible after 1am. Low around 48. Southwest wind 13 to 16 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.
Sunday
A 40 percent chance of showers before 1pm. Mostly sunny, with a high near 61. Breezy.
Sunday Night
Clear, with a low around 40.
Monday
Sunny, with a high near 70.
Monday Night
Mostly clear, with a low around 48.
Tuesday
Sunny, with a high near 70. Breezy.
Tuesday Night
Mostly clear, with a low around 45.
Wednesday
Sunny, with a high near 65.
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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:
4:16 pm CDT Oct 15, 2025
Forecast Valid:
5pm CDT Oct 15, 2025-6pm CDT Oct 22, 2025
 
Forecast Discussion
 
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Additional Resources

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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