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.

Fog/Mist

51°F

11°C

Humidity 96%
Wind Speed SE 14 mph
Barometer 29.84 in (1010.5 mb)
Dewpoint 50°F (10°C)
Visibility 4.00 mi
Wind Chill46°F (8°C)
Last update 27 Dec 4:54 pm CST
Extended Forecast for

Forsyth IL

Wind Advisory December 28, 03:00pm until December 29, 06:00pm
Click here for hazard details and duration
Wind Advisory

  • Tonight

    Tonight: A 30 percent chance of rain after 2am. Patchy fog before 3am. Otherwise, cloudy, with a temperature rising to around 61 by 4am. South southwest wind 11 to 14 mph, with gusts as high as 22 mph.

    Low: 53 °F⇑

    Chance Rain
    and Patchy
    Fog

  • Sunday

    Sunday: Rain and thunderstorms likely, then rain and possibly a thunderstorm after noon. High near 67. Breezy, with a south southwest wind 10 to 15 mph becoming west 24 to 29 mph in the afternoon. Winds could gust as high as 38 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    High: 67 °F

    Rain Likely
    then Rain and
    Breezy

  • Sunday Night

    Sunday Night: A chance of rain and sleet before 9pm, then a chance of flurries after midnight. Mostly cloudy, with a low around 14. Wind chill values between -5 and 5. Windy, with a west wind 28 to 32 mph, with gusts as high as 46 mph. Chance of precipitation is 40%.

    Low: 14 °F

    Windy. Chance
    Rain/Sleet
    then Chance
    Flurries

  • Monday

    Monday: Partly sunny, with a high near 23. Wind chill values between -6 and 4. Windy, with a west northwest wind 24 to 32 mph, with gusts as high as 46 mph.

    High: 23 °F

    Partly Sunny
    and Windy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 12. Blustery, with a west northwest wind 16 to 22 mph, with gusts as high as 30 mph.

    Low: 12 °F

    Partly Cloudy
    and Blustery
    then Mostly
    Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 28. West northwest wind 11 to 15 mph, with gusts as high as 21 mph.

    High: 28 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 23. West southwest wind 10 to 13 mph, with gusts as high as 20 mph.

    Low: 23 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 36.

    High: 36 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 20.

    Low: 20 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A 30 percent chance of rain after 2am. Patchy fog before 3am. Otherwise, cloudy, with a temperature rising to around 61 by 4am. South southwest wind 11 to 14 mph, with gusts as high as 22 mph.
Sunday
Rain and thunderstorms likely, then rain and possibly a thunderstorm after noon. High near 67. Breezy, with a south southwest wind 10 to 15 mph becoming west 24 to 29 mph in the afternoon. Winds could gust as high as 38 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
A chance of rain and sleet before 9pm, then a chance of flurries after midnight. Mostly cloudy, with a low around 14. Wind chill values between -5 and 5. Windy, with a west wind 28 to 32 mph, with gusts as high as 46 mph. Chance of precipitation is 40%.
Monday
Partly sunny, with a high near 23. Wind chill values between -6 and 4. Windy, with a west northwest wind 24 to 32 mph, with gusts as high as 46 mph.
Monday Night
Partly cloudy, with a low around 12. Blustery, with a west northwest wind 16 to 22 mph, with gusts as high as 30 mph.
Tuesday
Mostly sunny, with a high near 28. West northwest wind 11 to 15 mph, with gusts as high as 21 mph.
Tuesday Night
Partly cloudy, with a low around 23. West southwest wind 10 to 13 mph, with gusts as high as 20 mph.
Wednesday
Partly sunny, with a high near 36.
Wednesday Night
Mostly cloudy, with a low around 20.
New Year's Day
Mostly sunny, with a high near 30.
Thursday Night
Mostly clear, with a low around 13.
Friday
Mostly sunny, with a high near 32.
Friday Night
Partly cloudy, with a low around 23.
Saturday
Partly sunny, 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:
4:53 pm CST Dec 27, 2025
Forecast Valid:
5pm CST Dec 27, 2025-6pm CST Jan 3, 2026
 
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