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.

Partly Cloudy

22°F

-6°C

Humidity 68%
Wind Speed NW 15 G 24 mph
Barometer 30.26 in (1025.6 mb)
Dewpoint 13°F (-11°C)
Visibility 10.00 mi
Wind Chill9°F (-13°C)
Last update 22 Feb 12:54 am CST
Extended Forecast for

4 Miles N Forsyth IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 19. Wind chill values between 5 and 11. Northwest wind 16 to 18 mph, with gusts as high as 29 mph.

    Low: 19 °F

    Mostly Cloudy

  • Sunday

    Sunday: Cloudy, then gradually becoming mostly sunny, with a high near 27. Wind chill values between 3 and 13. Blustery, with a northwest wind 20 to 23 mph, with gusts as high as 34 mph.

    High: 27 °F

    Decreasing
    Clouds and
    Blustery

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 14. Wind chill values between -3 and 7. Blustery, with a northwest wind 17 to 20 mph, with gusts as high as 30 mph.

    Low: 14 °F

    Mostly Cloudy
    and Blustery
    then Mostly
    Cloudy

  • Monday

    Monday: Partly sunny, then gradually becoming sunny, with a high near 31. Wind chill values between -1 and 9. North northwest wind 9 to 18 mph, with gusts as high as 28 mph.

    High: 31 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Increasing clouds, with a low around 17. Light and variable wind becoming south 5 to 9 mph after midnight. Winds could gust as high as 15 mph.

    Low: 17 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 47. Breezy, with a south wind 11 to 16 mph increasing to 18 to 23 mph in the morning. Winds could gust as high as 31 mph.

    High: 47 °F

    Mostly Cloudy
    and Breezy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 30. South southwest wind 11 to 14 mph becoming west after midnight. Winds could gust as high as 22 mph.

    Low: 30 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 48.

    High: 48 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Rain likely, mainly after midnight. Mostly cloudy, with a low around 30. Chance of precipitation is 60%.

    Low: 30 °F

    Rain Likely

Detailed Forecast

Overnight
Mostly cloudy, with a low around 19. Wind chill values between 5 and 11. Northwest wind 16 to 18 mph, with gusts as high as 29 mph.
Sunday
Cloudy, then gradually becoming mostly sunny, with a high near 27. Wind chill values between 3 and 13. Blustery, with a northwest wind 20 to 23 mph, with gusts as high as 34 mph.
Sunday Night
Mostly cloudy, with a low around 14. Wind chill values between -3 and 7. Blustery, with a northwest wind 17 to 20 mph, with gusts as high as 30 mph.
Monday
Partly sunny, then gradually becoming sunny, with a high near 31. Wind chill values between -1 and 9. North northwest wind 9 to 18 mph, with gusts as high as 28 mph.
Monday Night
Increasing clouds, with a low around 17. Light and variable wind becoming south 5 to 9 mph after midnight. Winds could gust as high as 15 mph.
Tuesday
Mostly cloudy, with a high near 47. Breezy, with a south wind 11 to 16 mph increasing to 18 to 23 mph in the morning. Winds could gust as high as 31 mph.
Tuesday Night
Mostly cloudy, with a low around 30. South southwest wind 11 to 14 mph becoming west after midnight. Winds could gust as high as 22 mph.
Wednesday
Mostly sunny, with a high near 48.
Wednesday Night
Rain likely, mainly after midnight. Mostly cloudy, with a low around 30. Chance of precipitation is 60%.
Thursday
A 40 percent chance of rain before noon. Partly sunny, with a high near 43.
Thursday Night
Partly cloudy, with a low around 25.
Friday
Sunny, with a high near 56.
Friday Night
Mostly clear, with a low around 37.
Saturday
Mostly sunny, with a high near 56.
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:
1:15 am CST Feb 22, 2026
Forecast Valid:
1am CST Feb 22, 2026-6pm CST Feb 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