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

Hazardous Weather Conditions

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Fair

73°F

23°C

Humidity 65%
Wind Speed S 14 G 22 mph
Barometer 29.87 in
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 16 May 2:55 am CDT
Extended Forecast for

Whiteash IL

  • Overnight

    Overnight: A 20 percent chance of showers and thunderstorms after 4am. Mostly cloudy, with a steady temperature around 72. South wind around 11 mph, with gusts as high as 22 mph.

    Low: 72 °F

    Slight Chance
    T-storms

  • Saturday

    Saturday: Showers and thunderstorms likely, mainly before 1pm. Mostly cloudy, with a high near 86. South southwest wind 10 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.

    High: 86 °F

    Showers
    Likely then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 66. South southeast wind 6 to 9 mph.

    Low: 66 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 88. South wind 8 to 16 mph, with gusts as high as 24 mph.

    High: 88 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 70. South wind 11 to 13 mph, with gusts as high as 22 mph.

    Low: 70 °F

    Mostly Clear

  • Monday

    Monday: A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 89. South wind 14 to 18 mph, with gusts as high as 28 mph.

    High: 89 °F

    Mostly Sunny
    then Chance
    T-storms

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72. South wind 13 to 16 mph, with gusts as high as 24 mph.

    Low: 72 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 88. South southwest wind 14 to 18 mph, with gusts as high as 26 mph.

    High: 88 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm before 1am, then showers likely. Mostly cloudy, with a low around 65. South wind 6 to 11 mph becoming northwest after midnight. Winds could gust as high as 18 mph.

    Low: 65 °F

    Showers

Detailed Forecast

Overnight
A 20 percent chance of showers and thunderstorms after 4am. Mostly cloudy, with a steady temperature around 72. South wind around 11 mph, with gusts as high as 22 mph.
Saturday
Showers and thunderstorms likely, mainly before 1pm. Mostly cloudy, with a high near 86. South southwest wind 10 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 60%.
Saturday Night
Partly cloudy, with a low around 66. South southeast wind 6 to 9 mph.
Sunday
Sunny, with a high near 88. South wind 8 to 16 mph, with gusts as high as 24 mph.
Sunday Night
Mostly clear, with a low around 70. South wind 11 to 13 mph, with gusts as high as 22 mph.
Monday
A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 89. South wind 14 to 18 mph, with gusts as high as 28 mph.
Monday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72. South wind 13 to 16 mph, with gusts as high as 24 mph.
Tuesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 88. South southwest wind 14 to 18 mph, with gusts as high as 26 mph.
Tuesday Night
Showers and possibly a thunderstorm before 1am, then showers likely. Mostly cloudy, with a low around 65. South wind 6 to 11 mph becoming northwest after midnight. Winds could gust as high as 18 mph.
Wednesday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 77. Northwest wind around 9 mph.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 57. North northeast wind 6 to 9 mph.
Thursday
A slight chance of showers. Mostly sunny, with a high near 75. Northeast wind around 9 mph.
Thursday Night
A slight chance of showers. Partly cloudy, with a low around 56. Northeast wind 3 to 8 mph.
Friday
A slight chance of showers. Mostly sunny, with a high near 78. Northeast wind 3 to 7 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Whiteash IL
 37.78°N 88.92°W
Last Update:
1:21 am CDT May 16, 2026
Forecast Valid:
3am CDT May 16, 2026-6pm CDT May 22, 2026
 
Forecast Discussion
 
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Additional Resources

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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