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.

Light Snow Fog/Mist

33°F

1°C

Humidity 92%
Wind Speed W 17 G 32 mph
Barometer 29.46 in (997.5 mb)
Dewpoint 31°F (-1°C)
Visibility 3.00 mi
Wind Chill22°F (-6°C)
Last update 15 Mar 11:54 pm CDT
Extended Forecast for

Forsyth IL

Wind Advisory March 16, 12:36am until March 16, 10:00am
Click here for hazard details and duration
Wind Advisory
  •  
    Wind Advisory March 16, 12:36am until March 16, 10:00am

    NOW until 10:00am Mon

    Wind Advisory

  • Overnight

    Low: 21 °F

    Chance Snow
    and Patchy
    Blowing Snow

  • Monday

    Monday: A 40 percent chance of snow, mainly before 1pm. Patchy blowing snow before 4pm. Cloudy, with a high near 26. Wind chill values between 2 and 8. Windy, with a west northwest wind 28 to 33 mph, with gusts as high as 45 mph.

    High: 26 °F

    Chance Snow
    and Patchy
    Blowing Snow

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 10. Wind chill values between -6 and 4. Blustery, with a west northwest wind 18 to 24 mph, with gusts as high as 32 mph.

    Low: 10 °F

    Mostly Cloudy
    and Blustery

  • Tuesday

    Tuesday: Mostly sunny, with a high near 26. Wind chill values between -7 and 3. West northwest wind 9 to 14 mph, with gusts as high as 21 mph.

    High: 26 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Snow likely, mainly after 1am. Mostly cloudy, with a low around 23. South southeast wind 6 to 11 mph increasing to 12 to 17 mph after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 23 °F

    Chance Snow
    then Snow
    Likely

  • Wednesday

    Wednesday: Cloudy through mid morning, then gradual clearing, with a high near 51. South wind 13 to 17 mph, with gusts as high as 25 mph.

    High: 51 °F

    Gradual
    Clearing

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 36. South southwest wind around 7 mph.

    Low: 36 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 63.

    High: 63 °F

    Mostly Sunny

Detailed Forecast

Overnight
A 40 percent chance of snow. Patchy blowing snow after 2am. Cloudy, with a low around 21. Windy, with a west northwest wind 24 to 31 mph, with gusts as high as 44 mph.
Monday
A 40 percent chance of snow, mainly before 1pm. Patchy blowing snow before 4pm. Cloudy, with a high near 26. Wind chill values between 2 and 8. Windy, with a west northwest wind 28 to 33 mph, with gusts as high as 45 mph.
Monday Night
Mostly cloudy, with a low around 10. Wind chill values between -6 and 4. Blustery, with a west northwest wind 18 to 24 mph, with gusts as high as 32 mph.
Tuesday
Mostly sunny, with a high near 26. Wind chill values between -7 and 3. West northwest wind 9 to 14 mph, with gusts as high as 21 mph.
Tuesday Night
Snow likely, mainly after 1am. Mostly cloudy, with a low around 23. South southeast wind 6 to 11 mph increasing to 12 to 17 mph after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Wednesday
Cloudy through mid morning, then gradual clearing, with a high near 51. South wind 13 to 17 mph, with gusts as high as 25 mph.
Wednesday Night
Partly cloudy, with a low around 36. South southwest wind around 7 mph.
Thursday
Mostly sunny, with a high near 63.
Thursday Night
Mostly clear, with a low around 39.
Friday
Partly sunny, with a high near 69.
Friday Night
Mostly cloudy, with a low around 46.
Saturday
Mostly sunny, with a high near 69.
Saturday Night
Mostly clear, with a low around 42.
Sunday
Mostly sunny, with a high near 66.
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:
10:31 pm CDT Mar 15, 2026
Forecast Valid:
12am CDT Mar 16, 2026-6pm CDT Mar 22, 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