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 100%
Wind Speed NE 5 mph
Barometer 30.03 in
Dewpoint 54°F (12°C)
Visibility 3.00 mi
Wind Chill53°F (12°C)
Last update 20 Nov 2:45 pm CST
Extended Forecast for

Royalton IL

  • This Afternoon

    This Afternoon: A 40 percent chance of showers. Cloudy, with a high near 56. East southeast wind around 6 mph becoming calm.

    High: 56 °F

    Chance
    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

    Chance
    Showers and
    Patchy Fog
    then Showers
    and Areas Fog

  • Friday

    Friday: Showers and possibly a thunderstorm. High near 66. Calm wind becoming southeast 5 to 9 mph in the morning. Chance of precipitation is 100%.

    High: 66 °F

    Showers then
    Showers
    Likely

  • Friday Night

    Friday Night: Showers likely and possibly a thunderstorm before midnight, then a chance of showers. Mostly cloudy, with a low around 47. Southwest wind around 6 mph becoming north after midnight. Chance of precipitation is 70%.

    Low: 47 °F

    Showers
    Likely then
    Chance
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 58. North wind 3 to 8 mph.

    High: 58 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 37. Calm wind.

    Low: 37 °F

    Mostly Clear

  • Sunday

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

    High: 63 °F

    Sunny

  • Sunday Night

    Sunday Night: A slight chance of showers after midnight. Mostly cloudy, with a low around 42. Light south southeast wind.

    Low: 42 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Monday

    Monday: Showers likely, mainly after noon. Mostly cloudy, with a high near 61. Light southeast wind becoming south southeast 5 to 10 mph in the morning.

    High: 61 °F

    Showers
    Likely

Detailed Forecast

This Afternoon
A 40 percent chance of showers. Cloudy, with a high near 56. East southeast wind around 6 mph becoming calm.
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 66. Calm wind becoming southeast 5 to 9 mph in the morning. Chance of precipitation is 100%.
Friday Night
Showers likely and possibly a thunderstorm before midnight, then a chance of showers. Mostly cloudy, with a low around 47. Southwest wind around 6 mph becoming north after midnight. Chance of precipitation is 70%.
Saturday
Mostly sunny, with a high near 58. North wind 3 to 8 mph.
Saturday Night
Mostly clear, with a low around 37. Calm wind.
Sunday
Sunny, with a high near 63. Calm wind becoming southwest around 6 mph.
Sunday Night
A slight chance of showers after midnight. Mostly cloudy, with a low around 42. Light south southeast wind.
Monday
Showers likely, mainly after noon. Mostly cloudy, with a high near 61. Light southeast wind becoming south southeast 5 to 10 mph in the morning.
Monday Night
Showers and possibly a thunderstorm before midnight, then showers likely. Mostly cloudy, with a low around 51. South wind 6 to 8 mph.
Tuesday
A chance of showers. Partly sunny, with a high near 65. South southwest wind 7 to 11 mph becoming west in the afternoon.
Tuesday Night
Partly cloudy, with a low around 38. Northwest wind 5 to 7 mph.
Wednesday
Mostly sunny, with a high near 51. West northwest wind 7 to 11 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:
2:06 pm CST Nov 20, 2025
Forecast Valid:
2pm CST Nov 20, 2025-6pm CST Nov 26, 2025
 
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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