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.

Overcast

73°F

23°C

Humidity 94%
Wind Speed SW 6 mph
Barometer 29.95 in
Dewpoint 72°F (22°C)
Visibility 7.00 mi
Last update 14 Jun 9:45 am CDT
Extended Forecast for

Royalton IL

  • Today

    Today: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 82. West wind 5 to 7 mph becoming north northwest in the afternoon.

    High: 82 °F

    Chance
    T-storms

  • Tonight

    Tonight: Mostly cloudy, with a low around 68. North wind around 6 mph becoming calm in the evening.

    Low: 68 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 84. North wind around 5 mph.

    High: 84 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 69. Calm wind.

    Low: 69 °F

    Partly Cloudy

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 84. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 40%.

    High: 84 °F

    Chance
    Showers then
    Chance
    T-storms

  • Monday Night

    Monday Night: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Light south wind.

    Low: 70 °F

    Slight Chance
    T-storms

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 87. South southwest wind 5 to 9 mph.

    High: 87 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms. Partly cloudy, with a low around 73. South southwest wind 6 to 8 mph.

    Low: 73 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 89. South southwest wind 10 to 15 mph, with gusts as high as 23 mph.

    High: 89 °F

    Slight Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Today
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 82. West wind 5 to 7 mph becoming north northwest in the afternoon.
Tonight
Mostly cloudy, with a low around 68. North wind around 6 mph becoming calm in the evening.
Sunday
Partly sunny, with a high near 84. North wind around 5 mph.
Sunday Night
Partly cloudy, with a low around 69. Calm wind.
Monday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 84. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 40%.
Monday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Light south wind.
Tuesday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 87. South southwest wind 5 to 9 mph.
Tuesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 73. South southwest wind 6 to 8 mph.
Wednesday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 89. South southwest wind 10 to 15 mph, with gusts as high as 23 mph.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 72. South southwest wind 7 to 11 mph, with gusts as high as 18 mph.
Juneteenth
A chance of showers and thunderstorms. Mostly sunny, with a high near 89. West wind 7 to 9 mph.
Thursday Night
Mostly clear, with a low around 70. Light and variable wind.
Friday
A slight chance of showers. Mostly sunny, with a high near 89. Calm wind becoming southwest 5 to 7 mph in the morning.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Royalton IL
 37.87°N 89.11°W
Last Update:
8:32 am CDT Jun 14, 2025
Forecast Valid:
10am CDT Jun 14, 2025-6pm CDT Jun 20, 2025
 
Forecast Discussion
 
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Additional Resources

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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