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.

Overcast and Breezy

37°F

3°C

Humidity 82%
Wind Speed NW 21 G 32 mph
Barometer 29.81 in (1010.2 mb)
Dewpoint 32°F (0°C)
Visibility 8.00 mi
Wind Chill26°F (-3°C)
Last update 6 Feb 9:54 am CST
Extended Forecast for

Forsyth IL

  • Today

    Today: Mostly cloudy, with a high near 40. Breezy, with a north northwest wind 16 to 22 mph, with gusts as high as 36 mph.

    High: 40 °F

    Mostly Cloudy
    and Breezy

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around 12. Wind chill values between 3 and 8. North wind 9 to 15 mph, with gusts as high as 23 mph.

    Low: 12 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Increasing clouds, with a high near 27. Wind chill values between 1 and 11. North northeast wind 5 to 8 mph becoming south southeast in the afternoon.

    High: 27 °F

    Increasing
    Clouds

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 20. South southeast wind 6 to 13 mph, with gusts as high as 18 mph.

    Low: 20 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 40. South southeast wind 9 to 14 mph, with gusts as high as 20 mph.

    High: 40 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 25. Southeast wind 6 to 8 mph.

    Low: 25 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 50. South southwest wind 6 to 8 mph.

    High: 50 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 34.

    Low: 34 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 30 percent chance of rain after noon. Mostly cloudy, with a high near 56.

    High: 56 °F

    Mostly Cloudy
    then Chance
    Rain

Detailed Forecast

Today
Mostly cloudy, with a high near 40. Breezy, with a north northwest wind 16 to 22 mph, with gusts as high as 36 mph.
Tonight
Mostly cloudy, then gradually becoming clear, with a low around 12. Wind chill values between 3 and 8. North wind 9 to 15 mph, with gusts as high as 23 mph.
Saturday
Increasing clouds, with a high near 27. Wind chill values between 1 and 11. North northeast wind 5 to 8 mph becoming south southeast in the afternoon.
Saturday Night
Mostly cloudy, with a low around 20. South southeast wind 6 to 13 mph, with gusts as high as 18 mph.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 40. South southeast wind 9 to 14 mph, with gusts as high as 20 mph.
Sunday Night
Partly cloudy, with a low around 25. Southeast wind 6 to 8 mph.
Monday
Sunny, with a high near 50. South southwest wind 6 to 8 mph.
Monday Night
Mostly clear, with a low around 34.
Tuesday
A 30 percent chance of rain after noon. Mostly cloudy, with a high near 56.
Tuesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 32.
Wednesday
Partly sunny, with a high near 44.
Wednesday Night
Mostly cloudy, with a low around 26.
Thursday
Mostly cloudy, with a high near 40.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Forsyth IL
 39.93°N 88.96°W (Elev. 650 ft)
Last Update:
9:37 am CST Feb 6, 2026
Forecast Valid:
10am CST Feb 6, 2026-6pm CST Feb 12, 2026
 
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