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.

A Few Clouds

33°F

1°C

Humidity 36%
Wind Speed W 9 mph
Barometer 30.26 in (1025.5 mb)
Dewpoint 9°F (-13°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 22 Jan 3:54 pm CST
Extended Forecast for

Forsyth IL

Winter Storm Watch January 24, 06:00am until January 25, 06:00pm
Cold Weather Advisory January 23, 03:00am until January 24, 12:00pm
Click here for hazard details and duration
Winter Storm Watch
Cold Weather Advisory

  • Tonight

    Tonight: Mostly cloudy, with a low around -1. Wind chill values between -6 and -16. North northwest wind 7 to 12 mph increasing to 13 to 18 mph after midnight. Winds could gust as high as 26 mph.

    Low: -1 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny and cold, with a high near 5. Wind chill values between -12 and -22. North wind 11 to 18 mph, with gusts as high as 28 mph.

    High: 5 °F

    Cold

  • Friday Night

    Friday Night: Increasing clouds, with a low around -1. Wind chill values between -11 and -16. Northeast wind around 11 mph, with gusts as high as 17 mph.

    Low: -1 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Snow likely, mainly after noon. Cloudy and cold, with a high near 10. Wind chill values between -5 and -15. East northeast wind 10 to 13 mph, with gusts as high as 17 mph. Chance of precipitation is 70%. New snow accumulation of around an inch possible.

    High: 10 °F

    Chance Snow
    then Snow
    Likely

  • Saturday Night

    Saturday Night: Snow. Low around 7. East northeast wind 10 to 13 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. New snow accumulation of 2 to 4 inches possible.

    Low: 7 °F

    Snow

  • Sunday

    Sunday: Snow likely, mainly before noon. Cloudy, with a high near 14. North wind around 14 mph, with gusts as high as 21 mph. Chance of precipitation is 70%.

    High: 14 °F

    Snow Likely

  • Sunday Night

    Sunday Night: A 30 percent chance of snow before midnight. Mostly cloudy, with a low around -2. Northwest wind around 13 mph, with gusts as high as 20 mph.

    Low: -2 °F

    Chance Snow
    then Partly
    Cloudy

  • Monday

    Monday: Sunny, with a high near 12.

    High: 12 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 1.

    Low: 1 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around -1. Wind chill values between -6 and -16. North northwest wind 7 to 12 mph increasing to 13 to 18 mph after midnight. Winds could gust as high as 26 mph.
Friday
Mostly sunny and cold, with a high near 5. Wind chill values between -12 and -22. North wind 11 to 18 mph, with gusts as high as 28 mph.
Friday Night
Increasing clouds, with a low around -1. Wind chill values between -11 and -16. Northeast wind around 11 mph, with gusts as high as 17 mph.
Saturday
Snow likely, mainly after noon. Cloudy and cold, with a high near 10. Wind chill values between -5 and -15. East northeast wind 10 to 13 mph, with gusts as high as 17 mph. Chance of precipitation is 70%. New snow accumulation of around an inch possible.
Saturday Night
Snow. Low around 7. East northeast wind 10 to 13 mph, with gusts as high as 18 mph. Chance of precipitation is 80%. New snow accumulation of 2 to 4 inches possible.
Sunday
Snow likely, mainly before noon. Cloudy, with a high near 14. North wind around 14 mph, with gusts as high as 21 mph. Chance of precipitation is 70%.
Sunday Night
A 30 percent chance of snow before midnight. Mostly cloudy, with a low around -2. Northwest wind around 13 mph, with gusts as high as 20 mph.
Monday
Sunny, with a high near 12.
Monday Night
Mostly clear, with a low around 1.
Tuesday
Mostly sunny, with a high near 24.
Tuesday Night
Mostly cloudy, with a low around 8.
Wednesday
Partly sunny, with a high near 19.
Wednesday Night
Partly cloudy, with a low around 0.
Thursday
Mostly sunny, with a high near 13.
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:
3:36 pm CST Jan 22, 2026
Forecast Valid:
4pm CST Jan 22, 2026-6pm CST Jan 29, 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