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.

Fair

30°F

-1°C

Humidity 72%
Wind Speed Calm
Barometer 30.15 in
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Last update 3 Feb 1:15 am CST
Extended Forecast for

Royalton IL

  • Overnight

    Overnight: Cloudy, with a low around 24. East northeast wind 3 to 5 mph.

    Low: 24 °F

    Cloudy

  • Tuesday

    Tuesday: A chance of drizzle, snow, and freezing rain before 1pm, then a slight chance of drizzle between 1pm and 2pm. Mostly cloudy, with a high near 36. Light and variable wind becoming north 5 to 10 mph in the morning. Chance of precipitation is 30%.

    High: 36 °F

    Chance Wintry
    Mix

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 22. North wind around 8 mph.

    Low: 22 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 31. North wind 6 to 10 mph.

    High: 31 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 14. North wind around 6 mph becoming calm in the evening.

    Low: 14 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 36. Calm wind becoming south southwest 5 to 9 mph in the afternoon.

    High: 36 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 28. South southwest wind around 9 mph.

    Low: 28 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 50. West southwest wind 7 to 10 mph becoming north northwest in the afternoon.

    High: 50 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 25. North northwest wind 3 to 6 mph.

    Low: 25 °F

    Mostly Clear

Detailed Forecast

Overnight
Cloudy, with a low around 24. East northeast wind 3 to 5 mph.
Tuesday
A chance of drizzle, snow, and freezing rain before 1pm, then a slight chance of drizzle between 1pm and 2pm. Mostly cloudy, with a high near 36. Light and variable wind becoming north 5 to 10 mph in the morning. Chance of precipitation is 30%.
Tuesday Night
Mostly cloudy, with a low around 22. North wind around 8 mph.
Wednesday
Partly sunny, with a high near 31. North wind 6 to 10 mph.
Wednesday Night
Partly cloudy, with a low around 14. North wind around 6 mph becoming calm in the evening.
Thursday
Partly sunny, with a high near 36. Calm wind becoming south southwest 5 to 9 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 28. South southwest wind around 9 mph.
Friday
Sunny, with a high near 50. West southwest wind 7 to 10 mph becoming north northwest in the afternoon.
Friday Night
Mostly clear, with a low around 25. North northwest wind 3 to 6 mph.
Saturday
Sunny, with a high near 42. Light and variable wind becoming east 5 to 7 mph in the morning.
Saturday Night
Partly cloudy, with a low around 26. East southeast wind around 6 mph.
Sunday
Mostly sunny, with a high near 44. Northeast wind around 7 mph.
Sunday Night
Partly cloudy, with a low around 25. East northeast wind 3 to 5 mph.
Monday
Mostly sunny, with a high near 42. East northeast wind 5 to 7 mph becoming southeast in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Royalton IL
 37.9°N 89.11°W
Last Update:
1:12 am CST Feb 3, 2026
Forecast Valid:
1am CST Feb 3, 2026-6pm CST Feb 9, 2026
 
Forecast Discussion
 
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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