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.

Fair

46°F

8°C

Humidity 61%
Wind Speed SW 9 mph
Barometer 30.22 in (1023.5 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Wind Chill41°F (5°C)
Last update 6 Apr 2:54 am CDT
Extended Forecast for

3 Miles WSW Forsyth IL

  • Overnight

    Overnight: Clear, with a low around 40. West southwest wind around 8 mph, with gusts as high as 17 mph.

    Low: 40 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 57. Northwest wind 10 to 15 mph, with gusts as high as 24 mph.

    High: 57 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 33. Northwest wind 9 to 11 mph becoming north northeast after midnight. Winds could gust as high as 18 mph.

    Low: 33 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 47. East wind around 11 mph, with gusts as high as 17 mph.

    High: 47 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 36. East southeast wind 10 to 14 mph, with gusts as high as 21 mph.

    Low: 36 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 69. Breezy, with a south southeast wind 14 to 21 mph, with gusts as high as 28 mph.

    High: 69 °F

    Partly Sunny
    then Partly
    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 52. South wind around 17 mph, with gusts as high as 26 mph.

    Low: 52 °F

    Partly Cloudy

  • Thursday

    Thursday: A 30 percent chance of showers after 1pm. Partly sunny, with a high near 68. Breezy.

    High: 68 °F

    Breezy.
    Mostly Sunny
    then Chance
    Showers

  • Thursday Night

    Thursday Night: Showers likely, mainly after 1am. Mostly cloudy, with a low around 53. Chance of precipitation is 60%.

    Low: 53 °F

    Showers
    Likely

Detailed Forecast

Overnight
Clear, with a low around 40. West southwest wind around 8 mph, with gusts as high as 17 mph.
Monday
Sunny, with a high near 57. Northwest wind 10 to 15 mph, with gusts as high as 24 mph.
Monday Night
Mostly cloudy, with a low around 33. Northwest wind 9 to 11 mph becoming north northeast after midnight. Winds could gust as high as 18 mph.
Tuesday
Mostly cloudy, with a high near 47. East wind around 11 mph, with gusts as high as 17 mph.
Tuesday Night
Mostly cloudy, with a low around 36. East southeast wind 10 to 14 mph, with gusts as high as 21 mph.
Wednesday
Partly sunny, with a high near 69. Breezy, with a south southeast wind 14 to 21 mph, with gusts as high as 28 mph.
Wednesday Night
Partly cloudy, with a low around 52. South wind around 17 mph, with gusts as high as 26 mph.
Thursday
A 30 percent chance of showers after 1pm. Partly sunny, with a high near 68. Breezy.
Thursday Night
Showers likely, mainly after 1am. Mostly cloudy, with a low around 53. Chance of precipitation is 60%.
Friday
A 50 percent chance of showers. Mostly cloudy, with a high near 68.
Friday Night
A chance of showers. Mostly cloudy, with a low around 50.
Saturday
A chance of showers. Partly sunny, with a high near 73.
Saturday Night
Mostly cloudy, with a low around 59.
Sunday
A chance of showers. Mostly cloudy, with a high near 78. Breezy.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW Forsyth IL
 39.89°N 89.02°W (Elev. 656 ft)
Last Update:
1:26 am CDT Apr 6, 2026
Forecast Valid:
3am CDT Apr 6, 2026-6pm CDT Apr 12, 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