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

45°F

7°C

Humidity 66%
Wind Speed SW 5 mph
Barometer 30.27 in (1025.2 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill42°F (6°C)
Last update 5 Apr 10:54 pm CDT
Extended Forecast for

4 Miles N Forsyth IL

  • Tonight

    Tonight: Clear, with a low around 38. West southwest wind 8 to 10 mph, with gusts as high as 18 mph.

    Low: 38 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 55. Northwest wind 11 to 16 mph, with gusts as high as 22 mph.

    High: 55 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 32. North northwest wind 10 to 14 mph, with gusts as high as 20 mph.

    Low: 32 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 47. East wind around 10 mph, with gusts as high as 16 mph.

    High: 47 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 37. East southeast wind 10 to 14 mph, with gusts as high as 21 mph.

    Low: 37 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 69. Breezy, with a south wind 14 to 22 mph, with gusts as high as 29 mph.

    High: 69 °F

    Partly Sunny
    and Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 53. South wind around 18 mph, with gusts as high as 26 mph.

    Low: 53 °F

    Partly Cloudy

  • Thursday

    Thursday: A 30 percent chance of showers after 1pm. Partly sunny, with a high near 71. Breezy.

    High: 71 °F

    Breezy.
    Partly Sunny
    then Chance
    Showers

  • Thursday Night

    Thursday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 54.

    Low: 54 °F

    Chance
    Showers

Detailed Forecast

Tonight
Clear, with a low around 38. West southwest wind 8 to 10 mph, with gusts as high as 18 mph.
Monday
Sunny, with a high near 55. Northwest wind 11 to 16 mph, with gusts as high as 22 mph.
Monday Night
Mostly cloudy, with a low around 32. North northwest wind 10 to 14 mph, with gusts as high as 20 mph.
Tuesday
Partly sunny, with a high near 47. East wind around 10 mph, with gusts as high as 16 mph.
Tuesday Night
Mostly cloudy, with a low around 37. 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 wind 14 to 22 mph, with gusts as high as 29 mph.
Wednesday Night
Partly cloudy, with a low around 53. South wind around 18 mph, with gusts as high as 26 mph.
Thursday
A 30 percent chance of showers after 1pm. Partly sunny, with a high near 71. Breezy.
Thursday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 54.
Friday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 69. Chance of precipitation is 40%.
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
A chance of showers. Mostly cloudy, with a low around 57.
Sunday
A chance of showers. Mostly cloudy, with a high near 80. Breezy.
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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:
10:36 pm CDT Apr 5, 2026
Forecast Valid:
11pm CDT Apr 5, 2026-6pm CDT Apr 12, 2026
 
Forecast Discussion
 
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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