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

54°F

12°C

Humidity 94%
Wind Speed Calm
Barometer 30.05 in
Dewpoint 52°F (11°C)
Visibility 5.00 mi
Last update 20 Nov 12:45 pm CST
Extended Forecast for

Royalton IL

  • This Afternoon

    This Afternoon: Showers likely, mainly before 1pm. Cloudy, with a high near 58. East southeast wind 3 to 7 mph. Chance of precipitation is 60%.

    High: 58 °F

    Showers
    Likely

  • 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

This Afternoon
Showers likely, mainly before 1pm. Cloudy, with a high near 58. East southeast wind 3 to 7 mph. Chance of precipitation is 60%.
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
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Royalton IL
 37.87°N 89.11°W
Last Update:
9:56 am CST Nov 20, 2025
Forecast Valid:
12pm CST Nov 20, 2025-6pm CST Nov 26, 2025
 
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