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.

Overcast

27°F

-3°C

Humidity 80%
Wind Speed NW 12 mph
Barometer 30.13 in
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill16°F (-9°C)
Last update 2 Dec 11:45 am CST
Extended Forecast for

Royalton IL

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 33. Northwest wind 5 to 7 mph becoming calm.

    High: 33 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 22. Light south wind.

    Low: 22 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 43. South southwest wind 5 to 10 mph becoming light in the afternoon.

    High: 43 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 20. Light and variable wind becoming north northwest 6 to 11 mph in the evening. Winds could gust as high as 18 mph.

    Low: 20 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 29. North wind 6 to 11 mph becoming light in the afternoon. Winds could gust as high as 18 mph.

    High: 29 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 16. Calm wind.

    Low: 16 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 39. Calm wind becoming south southwest around 6 mph in the morning.

    High: 39 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 25. Light southwest wind.

    Low: 25 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 42. Light and variable wind becoming west 5 to 7 mph in the morning.

    High: 42 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 33. Northwest wind 5 to 7 mph becoming calm.
Tonight
Partly cloudy, with a low around 22. Light south wind.
Wednesday
Mostly sunny, with a high near 43. South southwest wind 5 to 10 mph becoming light in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 20. Light and variable wind becoming north northwest 6 to 11 mph in the evening. Winds could gust as high as 18 mph.
Thursday
Mostly sunny, with a high near 29. North wind 6 to 11 mph becoming light in the afternoon. Winds could gust as high as 18 mph.
Thursday Night
Partly cloudy, with a low around 16. Calm wind.
Friday
Mostly sunny, with a high near 39. Calm wind becoming south southwest around 6 mph in the morning.
Friday Night
Partly cloudy, with a low around 25. Light southwest wind.
Saturday
Mostly sunny, with a high near 42. Light and variable wind becoming west 5 to 7 mph in the morning.
Saturday Night
Mostly cloudy, with a low around 26. East northeast wind 3 to 6 mph.
Sunday
Partly sunny, with a high near 38. North wind 6 to 9 mph.
Sunday Night
Mostly cloudy, with a low around 22. North wind 3 to 6 mph.
Monday
Mostly sunny, with a high near 39. North wind 5 to 7 mph becoming south southwest in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Royalton IL
 37.87°N 89.11°W
Last Update:
10:47 am CST Dec 2, 2025
Forecast Valid:
12pm CST Dec 2, 2025-6pm CST Dec 8, 2025
 
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Additional Resources

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High Temperature

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Chance of Precipitation