National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Fair

71°F

22°C

Humidity 83%
Wind Speed Calm
Barometer 30.03 in
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 25 Aug 10:15 pm CDT
Extended Forecast for

Whiteash IL

  • Tonight

    Tonight: Partly cloudy, with a low around 68. Calm wind.

    Low: 68 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of showers before 8am. Partly sunny, with a high near 91. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 91 °F

    Slight Chance
    Showers then
    Partly Sunny

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Calm wind. Chance of precipitation is 40%.

    Low: 68 °F

    Chance
    Showers

  • Thursday

    Thursday: Mostly sunny, with a high near 88. Calm wind becoming north 5 to 9 mph in the morning.

    High: 88 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 65. North wind around 6 mph becoming calm in the evening.

    Low: 65 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 88. Calm wind becoming north northeast 5 to 9 mph in the morning.

    High: 88 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 62. North northeast wind around 6 mph becoming calm in the evening.

    Low: 62 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 90. Calm wind becoming east southeast around 5 mph in the afternoon.

    High: 90 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 65. Light east southeast wind.

    Low: 65 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 68. Calm wind.
Wednesday
A 20 percent chance of showers before 8am. Partly sunny, with a high near 91. Calm wind becoming southwest around 6 mph in the afternoon.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Calm wind. Chance of precipitation is 40%.
Thursday
Mostly sunny, with a high near 88. Calm wind becoming north 5 to 9 mph in the morning.
Thursday Night
Mostly clear, with a low around 65. North wind around 6 mph becoming calm in the evening.
Friday
Sunny, with a high near 88. Calm wind becoming north northeast 5 to 9 mph in the morning.
Friday Night
Clear, with a low around 62. North northeast wind around 6 mph becoming calm in the evening.
Saturday
Sunny, with a high near 90. Calm wind becoming east southeast around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 65. Light east southeast wind.
Sunday
Sunny, with a high near 94. Light south southeast wind becoming south southwest 5 to 10 mph in the morning.
Sunday Night
Mostly clear, with a low around 71. South wind 3 to 5 mph.
Monday
Sunny, with a high near 95. South southwest wind 5 to 10 mph.
Monday Night
Mostly clear, with a low around 73. South wind 3 to 6 mph.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 95. Southwest wind 3 to 8 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Whiteash IL
 37.78°N 88.92°W
Last Update:
8:36 pm CDT Aug 25, 2026
Forecast Valid:
10pm CDT Aug 25, 2026-6pm CDT Sep 1, 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