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.

Light Rain Fog/Mist

48°F

9°C

Humidity 100%
Wind Speed S 14 mph
Barometer 30.06 in
Dewpoint 48°F (9°C)
Visibility 3.00 mi
Wind Chill42°F (6°C)
Last update 20 Nov 10:45 am CST
Extended Forecast for

Royalton IL

  • Today

    Today: Showers, mainly before 1pm. High near 58. East southeast wind 3 to 7 mph. Chance of precipitation is 80%.

    High: 58 °F

    Showers

  • Tonight

    Tonight: Showers, with thunderstorms also possible after 3am. Patchy fog after 7pm. Low around 54. Calm wind. Chance of precipitation is 90%.

    Low: 54 °F

    Showers and
    Patchy Fog

  • Friday

    Friday: Showers and possibly a thunderstorm. High near 68. Light and variable wind becoming south southwest 5 to 9 mph in the morning. Chance of precipitation is 100%.

    High: 68 °F

    Showers

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm before midnight, then a slight chance of showers. Mostly cloudy, with a low around 49. North wind around 6 mph. Chance of precipitation is 70%.

    Low: 49 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 60. North wind 3 to 7 mph.

    High: 60 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 39. Calm wind.

    Low: 39 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 63. Calm wind becoming southwest around 6 mph.

    High: 63 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A slight chance of showers. Mostly cloudy, with a low around 44. Light and variable wind.

    Low: 44 °F

    Slight Chance
    Showers

  • Monday

    Monday: A chance of showers. Mostly cloudy, with a high near 60. Southeast wind 3 to 8 mph.

    High: 60 °F

    Chance
    Showers

Detailed Forecast

Today
Showers, mainly before 1pm. High near 58. East southeast wind 3 to 7 mph. Chance of precipitation is 80%.
Tonight
Showers, with thunderstorms also possible after 3am. Patchy fog after 7pm. Low around 54. Calm wind. Chance of precipitation is 90%.
Friday
Showers and possibly a thunderstorm. High near 68. Light and variable wind becoming south southwest 5 to 9 mph in the morning. Chance of precipitation is 100%.
Friday Night
Showers likely and possibly a thunderstorm before midnight, then a slight chance of showers. Mostly cloudy, with a low around 49. North wind around 6 mph. Chance of precipitation is 70%.
Saturday
Mostly sunny, with a high near 60. North wind 3 to 7 mph.
Saturday Night
Mostly clear, with a low around 39. Calm wind.
Sunday
Mostly sunny, with a high near 63. Calm wind becoming southwest around 6 mph.
Sunday Night
A slight chance of showers. Mostly cloudy, with a low around 44. Light and variable wind.
Monday
A chance of showers. Mostly cloudy, with a high near 60. Southeast wind 3 to 8 mph.
Monday Night
Showers. Mostly cloudy, with a low around 50. South southeast wind 6 to 8 mph.
Tuesday
A chance of showers. Partly sunny, with a high near 63. South wind 7 to 11 mph becoming west in the afternoon.
Tuesday Night
Partly cloudy, with a low around 42. West wind around 6 mph.
Wednesday
Mostly sunny, with a high near 54. Northwest wind 6 to 10 mph.
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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:
9:56 am CST Nov 20, 2025
Forecast Valid:
10am CST Nov 20, 2025-6pm CST Nov 26, 2025
 
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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