National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Fair

79°F

26°C

Humidity 32%
Wind Speed N 10 mph
Barometer 30.13 in
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 4 Oct 5:45 pm CDT
Extended Forecast for

Royalton IL

  • Tonight

    Tonight: Clear, with a low around 52. Calm wind becoming north northeast around 5 mph after midnight.

    Low: 52 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 77. Northeast wind 5 to 10 mph.

    High: 77 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 47. Light east northeast wind.

    Low: 47 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 79. Light and variable wind.

    High: 79 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 50. Calm wind.

    Low: 50 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 85. Calm wind becoming west southwest around 6 mph in the afternoon.

    High: 85 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 54. Light and variable wind.

    Low: 54 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 84. Calm wind becoming northeast around 6 mph in the afternoon.

    High: 84 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 53. Calm wind.

    Low: 53 °F

    Clear

Detailed Forecast

Tonight
Clear, with a low around 52. Calm wind becoming north northeast around 5 mph after midnight.
Monday
Sunny, with a high near 77. Northeast wind 5 to 10 mph.
Monday Night
Clear, with a low around 47. Light east northeast wind.
Tuesday
Sunny, with a high near 79. Light and variable wind.
Tuesday Night
Clear, with a low around 50. Calm wind.
Wednesday
Sunny, with a high near 85. Calm wind becoming west southwest around 6 mph in the afternoon.
Wednesday Night
Clear, with a low around 54. Light and variable wind.
Thursday
Sunny, with a high near 84. Calm wind becoming northeast around 6 mph in the afternoon.
Thursday Night
Clear, with a low around 53. Calm wind.
Friday
Sunny, with a high near 84. Calm wind becoming southeast around 6 mph in the afternoon.
Friday Night
Mostly clear, with a low around 53. Light east wind.
Saturday
Mostly sunny, with a high near 82. Calm wind becoming southeast 5 to 9 mph in the morning.
Saturday Night
A slight chance of showers. Partly cloudy, with a low around 56. East southeast wind 3 to 5 mph.
Sunday
A chance of showers. Partly sunny, with a high near 81. East northeast wind 5 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:
5:06 pm CDT Oct 4, 2026
Forecast Valid:
6pm CDT Oct 4, 2026-6pm CDT Oct 11, 2026
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation