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

18°F

-8°C

Humidity 77%
Wind Speed SW 7 mph
Barometer 30.20 in (1023.4 mb)
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Wind Chill9°F (-13°C)
Last update 24 Feb 2:54 am CST
Extended Forecast for

Forsyth IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 18. South wind 7 to 9 mph, with gusts as high as 17 mph.

    Low: 18 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 46. Breezy, with a south southwest wind 11 to 16 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 36 mph.

    High: 46 °F

    Mostly Cloudy
    and Breezy

  • Tuesday Night

    Tuesday Night: Cloudy, then gradually becoming partly cloudy, with a low around 29. South southwest wind 9 to 15 mph becoming west northwest after midnight. Winds could gust as high as 24 mph.

    Low: 29 °F

    Decreasing
    Clouds

  • Wednesday

    Wednesday: Mostly sunny, with a high near 44. West northwest wind 8 to 11 mph, with gusts as high as 18 mph.

    High: 44 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A chance of rain and snow before 9pm, then snow likely. Mostly cloudy, with a low around 28. North wind 7 to 11 mph becoming east northeast after midnight. Winds could gust as high as 15 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    Low: 28 °F

    Chance
    Rain/Snow
    then Snow
    Likely

  • Thursday

    Thursday: A chance of snow before 9am, then a chance of rain between 9am and noon. Mostly sunny, with a high near 44. East northeast wind 8 to 11 mph becoming north northwest in the afternoon. Winds could gust as high as 15 mph. Chance of precipitation is 30%.

    High: 44 °F

    Chance
    Rain/Snow
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 27. North northwest wind 5 to 8 mph becoming south after midnight.

    Low: 27 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 57.

    High: 57 °F

    Sunny

  • Friday Night

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

    Low: 34 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 18. South wind 7 to 9 mph, with gusts as high as 17 mph.
Tuesday
Mostly cloudy, with a high near 46. Breezy, with a south southwest wind 11 to 16 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 36 mph.
Tuesday Night
Cloudy, then gradually becoming partly cloudy, with a low around 29. South southwest wind 9 to 15 mph becoming west northwest after midnight. Winds could gust as high as 24 mph.
Wednesday
Mostly sunny, with a high near 44. West northwest wind 8 to 11 mph, with gusts as high as 18 mph.
Wednesday Night
A chance of rain and snow before 9pm, then snow likely. Mostly cloudy, with a low around 28. North wind 7 to 11 mph becoming east northeast after midnight. Winds could gust as high as 15 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Thursday
A chance of snow before 9am, then a chance of rain between 9am and noon. Mostly sunny, with a high near 44. East northeast wind 8 to 11 mph becoming north northwest in the afternoon. Winds could gust as high as 15 mph. Chance of precipitation is 30%.
Thursday Night
Mostly clear, with a low around 27. North northwest wind 5 to 8 mph becoming south after midnight.
Friday
Sunny, with a high near 57.
Friday Night
Mostly clear, with a low around 34.
Saturday
Mostly sunny, with a high near 56.
Saturday Night
Partly cloudy, with a low around 25.
Sunday
A chance of rain and snow. Partly sunny, with a high near 40.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 25.
Monday
A chance of rain and snow. Partly sunny, with a high near 41.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Forsyth IL
 39.93°N 88.96°W (Elev. 650 ft)
Last Update:
2:37 am CST Feb 24, 2026
Forecast Valid:
3am CST Feb 24, 2026-6pm CST Mar 2, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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