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

14°F

-10°C

Humidity 84%
Wind Speed SW 6 mph
Barometer 30.04 in (1018.7 mb)
Dewpoint 10°F (-12°C)
Visibility 9.00 mi
Wind Chill5°F (-15°C)
Last update 5 Dec 8:54 am CST
Extended Forecast for

Forsyth IL

  • Today

    Today: Mostly sunny, with a high near 29. Wind chill values between 3 and 13. South wind 7 to 11 mph, with gusts as high as 18 mph.

    High: 29 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 23. South wind 7 to 11 mph becoming west after midnight. Winds could gust as high as 20 mph.

    Low: 23 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 32. West northwest wind 5 to 7 mph becoming east northeast in the afternoon.

    High: 32 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Snow likely after midnight. Cloudy, with a low around 23. East southeast wind 5 to 9 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    Low: 23 °F

    Mostly Cloudy
    then Snow
    Likely

  • Sunday

    Sunday: Snow likely before noon. Mostly cloudy, with a high near 31. East southeast wind 9 to 14 mph becoming north in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    High: 31 °F

    Snow Likely
    then Mostly
    Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 4. North wind 5 to 13 mph, with gusts as high as 16 mph.

    Low: 4 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 23. Light and variable wind becoming south 5 to 7 mph in the afternoon.

    High: 23 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 15.

    Low: 15 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 36.

    High: 36 °F

    Partly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 29. Wind chill values between 3 and 13. South wind 7 to 11 mph, with gusts as high as 18 mph.
Tonight
Mostly cloudy, with a low around 23. South wind 7 to 11 mph becoming west after midnight. Winds could gust as high as 20 mph.
Saturday
Mostly cloudy, with a high near 32. West northwest wind 5 to 7 mph becoming east northeast in the afternoon.
Saturday Night
Snow likely after midnight. Cloudy, with a low around 23. East southeast wind 5 to 9 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Sunday
Snow likely before noon. Mostly cloudy, with a high near 31. East southeast wind 9 to 14 mph becoming north in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Sunday Night
Mostly cloudy, with a low around 4. North wind 5 to 13 mph, with gusts as high as 16 mph.
Monday
Mostly sunny, with a high near 23. Light and variable wind becoming south 5 to 7 mph in the afternoon.
Monday Night
Mostly cloudy, with a low around 15.
Tuesday
Partly sunny, with a high near 36.
Tuesday Night
A 30 percent chance of rain after midnight. Mostly cloudy, with a low around 29.
Wednesday
A chance of rain. Mostly cloudy, with a high near 38.
Wednesday Night
Mostly cloudy, with a low around 14.
Thursday
Partly sunny, with a high near 26.
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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:
8:51 am CST Dec 5, 2025
Forecast Valid:
9am CST Dec 5, 2025-6pm CST Dec 11, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation