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.

A Few Clouds

46°F

8°C

Humidity 47%
Wind Speed N 16 G 26 mph
Barometer 30.31 in (1026.5 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 6 Apr 11:54 pm CDT
Extended Forecast for

Forsyth IL

  • Overnight

    Overnight: Mostly cloudy, with a low around 33. Northeast wind around 11 mph, with gusts as high as 21 mph.

    Low: 33 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 47. East northeast wind 11 to 13 mph, with gusts as high as 18 mph.

    High: 47 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 36. East wind 10 to 14 mph, with gusts as high as 20 mph.

    Low: 36 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 68. Breezy, with a south southeast wind 14 to 21 mph, with gusts as high as 30 mph.

    High: 68 °F

    Partly Sunny
    then Mostly
    Sunny and
    Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 52. South wind around 16 mph, with gusts as high as 24 mph.

    Low: 52 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 72. South southwest wind 14 to 17 mph, with gusts as high as 26 mph.

    High: 72 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 55. South wind around 11 mph, with gusts as high as 18 mph.

    Low: 55 °F

    Chance
    Showers

  • Friday

    Friday: Showers likely. Mostly cloudy, with a high near 68. Chance of precipitation is 60%.

    High: 68 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 47.

    Low: 47 °F

    Chance
    Showers

Detailed Forecast

Overnight
Mostly cloudy, with a low around 33. Northeast wind around 11 mph, with gusts as high as 21 mph.
Tuesday
Mostly cloudy, with a high near 47. East northeast wind 11 to 13 mph, with gusts as high as 18 mph.
Tuesday Night
Mostly cloudy, with a low around 36. East wind 10 to 14 mph, with gusts as high as 20 mph.
Wednesday
Partly sunny, with a high near 68. Breezy, with a south southeast wind 14 to 21 mph, with gusts as high as 30 mph.
Wednesday Night
Partly cloudy, with a low around 52. South wind around 16 mph, with gusts as high as 24 mph.
Thursday
Mostly sunny, with a high near 72. South southwest wind 14 to 17 mph, with gusts as high as 26 mph.
Thursday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 55. South wind around 11 mph, with gusts as high as 18 mph.
Friday
Showers likely. Mostly cloudy, with a high near 68. Chance of precipitation is 60%.
Friday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 47.
Saturday
Mostly sunny, with a high near 69.
Saturday Night
Mostly cloudy, with a low around 57.
Sunday
A chance of showers. Mostly cloudy, with a high near 80. Breezy.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 63.
Monday
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:
Forsyth IL
 39.93°N 88.96°W (Elev. 650 ft)
Last Update:
11:42 pm CDT Apr 6, 2026
Forecast Valid:
12am CDT Apr 7, 2026-6pm CDT Apr 13, 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