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

40°F

4°C

Humidity 63%
Wind Speed NE 6 mph
Barometer 30.38 in
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill36°F (2°C)
Last update 23 Mar 9:55 pm CDT
Extended Forecast for

Whiteash IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 37. East northeast wind around 7 mph.

    Low: 37 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, then gradually becoming sunny, with a high near 63. East wind around 6 mph.

    High: 63 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 45. East southeast wind 3 to 5 mph.

    Low: 45 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 74. Light south wind becoming south southwest 5 to 10 mph in the morning.

    High: 74 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 61. South wind 8 to 10 mph, with gusts as high as 20 mph.

    Low: 61 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 86. South southwest wind 10 to 16 mph, with gusts as high as 25 mph.

    High: 86 °F

    Sunny

  • Thursday Night

    Thursday Night: A slight chance of showers, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 45. South southwest wind around 17 mph becoming north northwest after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 50%.

    Low: 45 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Friday

    Friday: Showers likely, mainly before 1pm. Mostly cloudy, with a high near 54. North wind around 18 mph, with gusts as high as 25 mph.

    High: 54 °F

    Showers
    Likely

  • Friday Night

    Friday Night: Partly cloudy, with a low around 33. North wind 10 to 16 mph, with gusts as high as 23 mph.

    Low: 33 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 37. East northeast wind around 7 mph.
Tuesday
Mostly cloudy, then gradually becoming sunny, with a high near 63. East wind around 6 mph.
Tuesday Night
Partly cloudy, with a low around 45. East southeast wind 3 to 5 mph.
Wednesday
Mostly sunny, with a high near 74. Light south wind becoming south southwest 5 to 10 mph in the morning.
Wednesday Night
Partly cloudy, with a low around 61. South wind 8 to 10 mph, with gusts as high as 20 mph.
Thursday
Sunny, with a high near 86. South southwest wind 10 to 16 mph, with gusts as high as 25 mph.
Thursday Night
A slight chance of showers, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 45. South southwest wind around 17 mph becoming north northwest after midnight. Winds could gust as high as 26 mph. Chance of precipitation is 50%.
Friday
Showers likely, mainly before 1pm. Mostly cloudy, with a high near 54. North wind around 18 mph, with gusts as high as 25 mph.
Friday Night
Partly cloudy, with a low around 33. North wind 10 to 16 mph, with gusts as high as 23 mph.
Saturday
Sunny, with a high near 58. Northeast wind 6 to 8 mph.
Saturday Night
Partly cloudy, with a low around 37. Light east southeast wind.
Sunday
Mostly sunny, with a high near 65. South wind 3 to 8 mph.
Sunday Night
Mostly cloudy, with a low around 49. South southeast wind around 7 mph.
Monday
Mostly sunny, with a high near 71. South southwest wind 7 to 11 mph, with gusts as high as 20 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:
8:16 pm CDT Mar 23, 2026
Forecast Valid:
10pm CDT Mar 23, 2026-6pm CDT Mar 30, 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