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 59%
Wind Speed W 6 mph
Barometer 30.29 in (1026.8 mb)
Dewpoint 6°F (-14°C)
Visibility 10.00 mi
Wind Chill10°F (-12°C)
Last update 22 Jan 6:54 am CST
Extended Forecast for

4 Miles N Forsyth IL

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

  • Today

    Today: Increasing clouds, with a high near 33. West wind 9 to 15 mph, with gusts as high as 24 mph.

    High: 33 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Mostly cloudy, with a low around -2. Wind chill values between -8 and -13. West wind 8 to 18 mph becoming north northwest after midnight. Winds could gust as high as 30 mph.

    Low: -2 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny and cold, with a high near 6. Wind chill values between -12 and -20. Blustery, with a north northwest wind 13 to 20 mph, with gusts as high as 26 mph.

    High: 6 °F

    Mostly Sunny
    and Blustery
    then Partly
    Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around -1. Wind chill values between -11 and -16. North northeast wind 11 to 13 mph, with gusts as high as 17 mph.

    Low: -1 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 50 percent chance of snow after noon. Cloudy, with a high near 11. East northeast wind around 11 mph, with gusts as high as 17 mph.

    High: 11 °F

    Cloudy then
    Chance Snow

  • Saturday Night

    Saturday Night: Snow. Low around 7. East northeast wind around 11 mph, with gusts as high as 17 mph. Chance of precipitation is 80%.

    Low: 7 °F

    Snow

  • Sunday

    Sunday: A 40 percent chance of snow. Mostly cloudy, with a high near 16. North wind 11 to 13 mph, with gusts as high as 17 mph.

    High: 16 °F

    Chance Snow

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around -2.

    Low: -2 °F

    Mostly Cloudy

  • Monday

    Monday: Sunny, with a high near 15.

    High: 15 °F

    Sunny

Detailed Forecast

Today
Increasing clouds, with a high near 33. West wind 9 to 15 mph, with gusts as high as 24 mph.
Tonight
Mostly cloudy, with a low around -2. Wind chill values between -8 and -13. West wind 8 to 18 mph becoming north northwest after midnight. Winds could gust as high as 30 mph.
Friday
Mostly sunny and cold, with a high near 6. Wind chill values between -12 and -20. Blustery, with a north northwest wind 13 to 20 mph, with gusts as high as 26 mph.
Friday Night
Mostly cloudy, with a low around -1. Wind chill values between -11 and -16. North northeast wind 11 to 13 mph, with gusts as high as 17 mph.
Saturday
A 50 percent chance of snow after noon. Cloudy, with a high near 11. East northeast wind around 11 mph, with gusts as high as 17 mph.
Saturday Night
Snow. Low around 7. East northeast wind around 11 mph, with gusts as high as 17 mph. Chance of precipitation is 80%.
Sunday
A 40 percent chance of snow. Mostly cloudy, with a high near 16. North wind 11 to 13 mph, with gusts as high as 17 mph.
Sunday Night
Mostly cloudy, with a low around -2.
Monday
Sunny, with a high near 15.
Monday Night
Mostly clear, with a low around 6.
Tuesday
Mostly sunny, with a high near 25.
Tuesday Night
Mostly cloudy, with a low around 12.
Wednesday
Partly sunny, with a high near 24.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles N Forsyth IL
 39.97°N 88.96°W (Elev. 679 ft)
Last Update:
6:36 am CST Jan 22, 2026
Forecast Valid:
7am CST Jan 22, 2026-6pm CST Jan 28, 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