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

40°F

4°C

Humidity 43%
Wind Speed W 12 mph
Barometer 30.01 in (1016.8 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill33°F (1°C)
Last update 21 Jan 10:54 am CST
Extended Forecast for

Forsyth IL

  • Today

    Today: Sunny, with a high near 39. West southwest wind 13 to 17 mph, with gusts as high as 28 mph.

    High: 39 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 19. Breezy, with a southwest wind 10 to 20 mph becoming west northwest after midnight. Winds could gust as high as 33 mph.

    Low: 19 °F

    Partly Cloudy
    and Breezy
    then Mostly
    Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 32. West wind 7 to 11 mph, with gusts as high as 16 mph.

    High: 32 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around -1. Wind chill values between -6 and -16. West wind 6 to 11 mph becoming north northwest 13 to 18 mph after midnight. Winds could gust as high as 25 mph.

    Low: -1 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy and cold, with a high near 6. North northwest wind 14 to 18 mph, with gusts as high as 25 mph.

    High: 6 °F

    Cold

  • Friday Night

    Friday Night: Mostly cloudy, with a low around -4. North northeast wind 10 to 13 mph, with gusts as high as 18 mph.

    Low: -4 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 30 percent chance of snow after noon. Mostly cloudy, with a high near 11. Northeast wind around 10 mph, with gusts as high as 16 mph.

    High: 11 °F

    Mostly Cloudy
    then Chance
    Snow

  • Saturday Night

    Saturday Night: A 50 percent chance of snow. Mostly cloudy, with a low around 5.

    Low: 5 °F

    Chance Snow

  • Sunday

    Sunday: Partly sunny, with a high near 18.

    High: 18 °F

    Partly Sunny

Detailed Forecast

Today
Sunny, with a high near 39. West southwest wind 13 to 17 mph, with gusts as high as 28 mph.
Tonight
Mostly clear, with a low around 19. Breezy, with a southwest wind 10 to 20 mph becoming west northwest after midnight. Winds could gust as high as 33 mph.
Thursday
Mostly sunny, with a high near 32. West wind 7 to 11 mph, with gusts as high as 16 mph.
Thursday Night
Mostly cloudy, with a low around -1. Wind chill values between -6 and -16. West wind 6 to 11 mph becoming north northwest 13 to 18 mph after midnight. Winds could gust as high as 25 mph.
Friday
Mostly cloudy and cold, with a high near 6. North northwest wind 14 to 18 mph, with gusts as high as 25 mph.
Friday Night
Mostly cloudy, with a low around -4. North northeast wind 10 to 13 mph, with gusts as high as 18 mph.
Saturday
A 30 percent chance of snow after noon. Mostly cloudy, with a high near 11. Northeast wind around 10 mph, with gusts as high as 16 mph.
Saturday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 5.
Sunday
Partly sunny, with a high near 18.
Sunday Night
Partly cloudy, with a low around 1.
Monday
Sunny, with a high near 18.
Monday Night
Mostly clear, with a low around 6.
Tuesday
Mostly sunny, with a high near 29.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Forsyth IL
 39.93°N 88.96°W (Elev. 650 ft)
Last Update:
10:31 am CST Jan 21, 2026
Forecast Valid:
11am CST Jan 21, 2026-6pm CST Jan 27, 2026
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation