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.

Mostly Cloudy

70°F

21°C

Humidity 78%
Wind Speed S 15 G 23 mph
Barometer 29.85 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 9 Mar 5:45 pm CDT
Extended Forecast for

Royalton IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 62. South southwest wind 9 to 16 mph, with gusts as high as 24 mph.

    Low: 62 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 10 percent chance of showers after 5pm. Partly sunny, with a high near 79. South southwest wind 8 to 17 mph, with gusts as high as 25 mph.

    High: 79 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 65. South southwest wind 14 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 80%.

    Low: 65 °F

    Chance
    T-storms then
    Showers

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 71. South southwest wind 16 to 18 mph becoming northwest in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 100%.

    High: 71 °F

    Showers

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 35. Breezy, with a north northwest wind 10 to 20 mph, with gusts as high as 28 mph.

    Low: 35 °F

    Slight Chance
    Showers and
    Breezy

  • Thursday

    Thursday: Sunny, with a high near 54. North northwest wind around 7 mph becoming west southwest in the afternoon.

    High: 54 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 42. South wind 6 to 16 mph, with gusts as high as 25 mph.

    Low: 42 °F

    Partly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 66. Southwest wind 11 to 15 mph, with gusts as high as 24 mph.

    High: 66 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 41. West wind around 6 mph becoming east after midnight.

    Low: 41 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 62. South southwest wind 9 to 16 mph, with gusts as high as 24 mph.
Tuesday
A 10 percent chance of showers after 5pm. Partly sunny, with a high near 79. South southwest wind 8 to 17 mph, with gusts as high as 25 mph.
Tuesday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 1am. Low around 65. South southwest wind 14 to 17 mph, with gusts as high as 26 mph. Chance of precipitation is 80%.
Wednesday
Showers and possibly a thunderstorm. High near 71. South southwest wind 16 to 18 mph becoming northwest in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 100%.
Wednesday Night
A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 35. Breezy, with a north northwest wind 10 to 20 mph, with gusts as high as 28 mph.
Thursday
Sunny, with a high near 54. North northwest wind around 7 mph becoming west southwest in the afternoon.
Thursday Night
Partly cloudy, with a low around 42. South wind 6 to 16 mph, with gusts as high as 25 mph.
Friday
Mostly cloudy, with a high near 66. Southwest wind 11 to 15 mph, with gusts as high as 24 mph.
Friday Night
Mostly cloudy, with a low around 41. West wind around 6 mph becoming east after midnight.
Saturday
Mostly sunny, with a high near 71. East southeast wind 7 to 14 mph becoming south in the afternoon. Winds could gust as high as 20 mph.
Saturday Night
Mostly clear, with a low around 53. South southwest wind 10 to 14 mph, with gusts as high as 24 mph.
Sunday
A chance of showers. Partly sunny, with a high near 67. Breezy, with a south southwest wind 14 to 20 mph becoming west northwest in the afternoon. Winds could gust as high as 29 mph.
Sunday Night
A chance of rain and snow showers. Partly cloudy, with a low around 31. Northwest wind 14 to 18 mph, with gusts as high as 25 mph.
Monday
Mostly sunny, with a high near 44. North northwest wind 11 to 13 mph, with gusts as high as 20 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Royalton IL
 37.9°N 89.11°W
Last Update:
3:01 pm CDT Mar 9, 2026
Forecast Valid:
6pm CDT Mar 9, 2026-6pm CDT Mar 16, 2026
 
Forecast Discussion
 
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Additional Resources

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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