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

39°F

4°C

Humidity 70%
Wind Speed Calm
Barometer 30.03 in
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Last update 6 Dec 9:47 am CST
Extended Forecast for

Royalton IL

  • Today

    Today: Sunny, with a high near 46. Light and variable wind.

    High: 46 °F

    Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 35. Light south wind.

    Low: 35 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 46. South southwest wind 5 to 10 mph becoming north in the afternoon.

    High: 46 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: A 20 percent chance of snow showers before midnight. Cloudy, with a low around 24. North wind 7 to 10 mph.

    Low: 24 °F

    Slight Chance
    Snow Showers
    then Mostly
    Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 36. North wind 3 to 7 mph.

    High: 36 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 24. Calm wind becoming south southwest 5 to 9 mph after midnight.

    Low: 24 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 48. South southwest wind 10 to 14 mph, with gusts as high as 21 mph.

    High: 48 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 39. Southwest wind 14 to 16 mph, with gusts as high as 24 mph.

    Low: 39 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers before noon. Partly sunny, with a high near 50. West southwest wind 10 to 17 mph becoming northwest in the afternoon. Winds could gust as high as 24 mph.

    High: 50 °F

    Slight Chance
    Showers then
    Partly Sunny

Detailed Forecast

Today
Sunny, with a high near 46. Light and variable wind.
Tonight
Mostly cloudy, with a low around 35. Light south wind.
Sunday
Mostly cloudy, with a high near 46. South southwest wind 5 to 10 mph becoming north in the afternoon.
Sunday Night
A 20 percent chance of snow showers before midnight. Cloudy, with a low around 24. North wind 7 to 10 mph.
Monday
Mostly sunny, with a high near 36. North wind 3 to 7 mph.
Monday Night
Mostly clear, with a low around 24. Calm wind becoming south southwest 5 to 9 mph after midnight.
Tuesday
Mostly sunny, with a high near 48. South southwest wind 10 to 14 mph, with gusts as high as 21 mph.
Tuesday Night
Mostly cloudy, with a low around 39. Southwest wind 14 to 16 mph, with gusts as high as 24 mph.
Wednesday
A slight chance of showers before noon. Partly sunny, with a high near 50. West southwest wind 10 to 17 mph becoming northwest in the afternoon. Winds could gust as high as 24 mph.
Wednesday Night
Mostly cloudy, with a low around 28. North wind 6 to 8 mph.
Thursday
A slight chance of showers. Mostly cloudy, with a high near 41. North northeast wind 6 to 10 mph becoming south southwest in the afternoon.
Thursday Night
Mostly cloudy, with a low around 24. East southeast wind 6 to 8 mph becoming northwest after midnight.
Friday
Partly sunny, with a high near 32. North northwest wind 8 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:
9:51 am CST Dec 6, 2025
Forecast Valid:
10am CST Dec 6, 2025-6pm CST Dec 12, 2025
 
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Additional Resources

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Chance of Precipitation