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

59°F

15°C

Humidity 98%
Wind Speed Calm
Barometer 30.14 in
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 23 Jun 4:35 am CDT
Extended Forecast for

Whiteash IL

  • Today

    Today: Sunny, with a high near 83. Calm wind becoming north around 5 mph in the afternoon.

    High: 83 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 62. Calm wind.

    Low: 62 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Mostly sunny, with a high near 84. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 84 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers after 1am. Partly cloudy, with a low around 67. South southwest wind around 6 mph becoming calm in the evening.

    Low: 67 °F

    Mostly Clear
    then Slight
    Chance
    Showers

  • Thursday

    Thursday: A slight chance of showers before 10am, then a slight chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 87. Calm wind becoming south southwest around 6 mph in the afternoon. Chance of precipitation is 60%.

    High: 87 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 10pm. Low around 70. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 80%.

    Low: 70 °F

    T-storms
    Likely then
    Showers

  • Friday

    Friday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 85. Light south southwest wind becoming southwest 5 to 9 mph in the morning. Chance of precipitation is 70%.

    High: 85 °F

    Showers
    Likely

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 72. Southwest wind 3 to 8 mph.

    Low: 72 °F

    Showers
    Likely

  • Saturday

    Saturday: A chance of showers and thunderstorms. Partly sunny, with a high near 89. South southwest wind 6 to 9 mph.

    High: 89 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 83. Calm wind becoming north around 5 mph in the afternoon.
Tonight
Increasing clouds, with a low around 62. Calm wind.
Wednesday
Mostly sunny, with a high near 84. Calm wind becoming south 5 to 7 mph in the afternoon.
Wednesday Night
A 20 percent chance of showers after 1am. Partly cloudy, with a low around 67. South southwest wind around 6 mph becoming calm in the evening.
Thursday
A slight chance of showers before 10am, then a slight chance of showers and thunderstorms between 10am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Mostly sunny, with a high near 87. Calm wind becoming south southwest around 6 mph in the afternoon. Chance of precipitation is 60%.
Thursday Night
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 10pm. Low around 70. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 80%.
Friday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 85. Light south southwest wind becoming southwest 5 to 9 mph in the morning. Chance of precipitation is 70%.
Friday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 72. Southwest wind 3 to 8 mph.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 89. South southwest wind 6 to 9 mph.
Saturday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 74. South wind 5 to 7 mph.
Sunday
Sunny, with a high near 93. South southwest wind 7 to 15 mph, with gusts as high as 23 mph.
Sunday Night
Mostly clear, with a low around 76. South wind 7 to 13 mph, with gusts as high as 20 mph.
Monday
Sunny, with a high near 95. South southwest wind 7 to 14 mph, with gusts as high as 21 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Whiteash IL
 37.78°N 88.92°W
Last Update:
3:16 am CDT Jun 23, 2026
Forecast Valid:
4am CDT Jun 23, 2026-6pm CDT Jun 29, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation