National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Overcast

25°F

-4°C

Humidity 72%
Wind Speed NE 8 mph
Barometer 30.39 in (1030.1 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Wind Chill16°F (-9°C)
Last update 4 Feb 11:54 am CST
Extended Forecast for

4 Miles N Forsyth IL

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 29. North wind around 7 mph.

    High: 29 °F

    Mostly Cloudy

  • Tonight

    Tonight: Partly cloudy, with a low around 11. Wind chill values between 3 and 8. Light and variable wind becoming southwest around 6 mph after midnight.

    Low: 11 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 32. Wind chill values between zero and 10. South southwest wind 6 to 14 mph, with gusts as high as 20 mph.

    High: 32 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 24. South southwest wind 9 to 13 mph, with gusts as high as 20 mph.

    Low: 24 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 42. Northwest wind 14 to 18 mph, with gusts as high as 26 mph.

    High: 42 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 19. Northwest wind 7 to 14 mph becoming north northeast after midnight. Winds could gust as high as 20 mph.

    Low: 19 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 32. North northeast wind 7 to 10 mph becoming southeast in the afternoon.

    High: 32 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 24.

    Low: 24 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 40.

    High: 40 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 29. North wind around 7 mph.
Tonight
Partly cloudy, with a low around 11. Wind chill values between 3 and 8. Light and variable wind becoming southwest around 6 mph after midnight.
Thursday
Mostly cloudy, with a high near 32. Wind chill values between zero and 10. South southwest wind 6 to 14 mph, with gusts as high as 20 mph.
Thursday Night
Partly cloudy, with a low around 24. South southwest wind 9 to 13 mph, with gusts as high as 20 mph.
Friday
Partly sunny, with a high near 42. Northwest wind 14 to 18 mph, with gusts as high as 26 mph.
Friday Night
Partly cloudy, with a low around 19. Northwest wind 7 to 14 mph becoming north northeast after midnight. Winds could gust as high as 20 mph.
Saturday
Mostly sunny, with a high near 32. North northeast wind 7 to 10 mph becoming southeast in the afternoon.
Saturday Night
Mostly cloudy, with a low around 24.
Sunday
Partly sunny, with a high near 40.
Sunday Night
Partly cloudy, with a low around 22.
Monday
Mostly sunny, with a high near 44.
Monday Night
Mostly cloudy, with a low around 30.
Tuesday
Partly sunny, with a high near 52.
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:
11:37 am CST Feb 4, 2026
Forecast Valid:
12pm CST Feb 4, 2026-6pm CST Feb 10, 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