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.

Fair

67°F

19°C

Humidity 44%
Wind Speed NW 5 mph
Barometer 29.74 in (1006.7 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 16 Jun 9:54 pm CDT
Extended Forecast for

4 Miles N Forsyth IL

Wind Advisory June 17, 01:00pm until June 17, 07:00pm
Click here for hazard details and duration
Wind Advisory

  • Tonight

    Tonight: Partly cloudy, with a low around 55. West northwest wind around 6 mph becoming calm.

    Low: 55 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Showers and thunderstorms likely, mainly after 5pm. Partly sunny, with a high near 83. Breezy, with a south southeast wind 9 to 14 mph increasing to 23 to 28 mph in the afternoon. Winds could gust as high as 45 mph. Chance of precipitation is 70%. New rainfall amounts between three quarters and one inch possible.

    High: 83 °F

    Breezy.
    Showers
    Likely then
    T-storms
    Likely

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms, mainly before 9pm. Some of the storms could produce heavy rainfall. Low around 63. Breezy, with a west southwest wind 21 to 26 mph decreasing to 14 to 19 mph after midnight. Winds could gust as high as 37 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 63 °F

    Heavy Rain
    and Breezy
    then Partly
    Cloudy

  • Thursday

    Thursday: Increasing clouds, with a high near 74. West northwest wind around 16 mph, with gusts as high as 23 mph.

    High: 74 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 56. West northwest wind 5 to 10 mph, with gusts as high as 15 mph.

    Low: 56 °F

    Mostly Clear

  • Juneteenth

    Juneteenth: Sunny, with a high near 77. Northwest wind 6 to 13 mph, with gusts as high as 17 mph.

    High: 77 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 58. Northwest wind 5 to 8 mph becoming light and variable.

    Low: 58 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 62.

    Low: 62 °F

    Partly Cloudy
    then Chance
    T-storms

Detailed Forecast

Tonight
Partly cloudy, with a low around 55. West northwest wind around 6 mph becoming calm.
Wednesday
Showers and thunderstorms likely, mainly after 5pm. Partly sunny, with a high near 83. Breezy, with a south southeast wind 9 to 14 mph increasing to 23 to 28 mph in the afternoon. Winds could gust as high as 45 mph. Chance of precipitation is 70%. New rainfall amounts between three quarters and one inch possible.
Wednesday Night
Showers and thunderstorms, mainly before 9pm. Some of the storms could produce heavy rainfall. Low around 63. Breezy, with a west southwest wind 21 to 26 mph decreasing to 14 to 19 mph after midnight. Winds could gust as high as 37 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Thursday
Increasing clouds, with a high near 74. West northwest wind around 16 mph, with gusts as high as 23 mph.
Thursday Night
Mostly clear, with a low around 56. West northwest wind 5 to 10 mph, with gusts as high as 15 mph.
Juneteenth
Sunny, with a high near 77. Northwest wind 6 to 13 mph, with gusts as high as 17 mph.
Friday Night
Mostly clear, with a low around 58. Northwest wind 5 to 8 mph becoming light and variable.
Saturday
Mostly sunny, with a high near 80.
Saturday Night
A 30 percent chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 62.
Sunday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 77. Chance of precipitation is 60%.
Sunday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 62.
Monday
A chance of showers. Mostly cloudy, with a high near 78.
Monday Night
Mostly cloudy, with a low around 59.
Tuesday
Mostly sunny, with a high near 79.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles N Forsyth IL
 39.97°N 88.96°W (Elev. 679 ft)
Last Update:
9:31 pm CDT Jun 16, 2026
Forecast Valid:
10pm CDT Jun 16, 2026-6pm CDT Jun 23, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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