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

27°F

-3°C

Humidity 74%
Wind Speed N 10 mph
Barometer 30.45 in
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill18°F (-8°C)
Last update 30 Nov 5:45 pm CST
Extended Forecast for

2 Miles ENE Johnston City IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 23. North wind 5 to 8 mph becoming light and variable.

    Low: 23 °F

    Mostly Cloudy

  • Monday

    Monday: A 20 percent chance of snow after 5pm. Mostly cloudy, with a high near 37. East northeast wind 3 to 8 mph.

    High: 37 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Monday Night

    Monday Night: Snow showers and sleet, becoming all snow after 1am, then gradually ending. Low around 25. Calm wind becoming north northwest 5 to 7 mph after midnight. Chance of precipitation is 80%. New snow and sleet accumulation of less than one inch possible.

    Low: 25 °F

    Snow/Sleet
    then Snow
    Showers

  • Tuesday

    Tuesday: Partly sunny, with a high near 34. North northwest wind 5 to 8 mph becoming calm in the afternoon.

    High: 34 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 21. Light and variable wind.

    Low: 21 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 41. South southwest wind 5 to 10 mph.

    High: 41 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 21. Light and variable wind becoming north northwest 5 to 10 mph after midnight.

    Low: 21 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 30. North northwest wind 5 to 10 mph becoming light north northeast in the afternoon.

    High: 30 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A chance of snow showers after midnight. Mostly cloudy, with a low around 18. Calm wind.

    Low: 18 °F

    Mostly Cloudy
    then Chance
    Snow Showers

Detailed Forecast

Tonight
Mostly cloudy, with a low around 23. North wind 5 to 8 mph becoming light and variable.
Monday
A 20 percent chance of snow after 5pm. Mostly cloudy, with a high near 37. East northeast wind 3 to 8 mph.
Monday Night
Snow showers and sleet, becoming all snow after 1am, then gradually ending. Low around 25. Calm wind becoming north northwest 5 to 7 mph after midnight. Chance of precipitation is 80%. New snow and sleet accumulation of less than one inch possible.
Tuesday
Partly sunny, with a high near 34. North northwest wind 5 to 8 mph becoming calm in the afternoon.
Tuesday Night
Mostly clear, with a low around 21. Light and variable wind.
Wednesday
Mostly sunny, with a high near 41. South southwest wind 5 to 10 mph.
Wednesday Night
Mostly cloudy, with a low around 21. Light and variable wind becoming north northwest 5 to 10 mph after midnight.
Thursday
Partly sunny, with a high near 30. North northwest wind 5 to 10 mph becoming light north northeast in the afternoon.
Thursday Night
A chance of snow showers after midnight. Mostly cloudy, with a low around 18. Calm wind.
Friday
A chance of snow showers before noon, then a chance of rain and snow showers. Mostly cloudy, with a high near 35. Calm wind becoming south southeast around 6 mph.
Friday Night
A chance of rain or freezing rain. Mostly cloudy, with a low around 27. Calm wind becoming west around 5 mph after midnight.
Saturday
A slight chance of showers. Mostly cloudy, with a high near 41. West wind 5 to 8 mph.
Saturday Night
A slight chance of showers. Mostly cloudy, with a low around 29. Light and variable wind becoming west around 6 mph after midnight.
Sunday
A slight chance of showers. Mostly cloudy, with a high near 40. West wind 6 to 8 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE Johnston City IL
 37.82°N 88.89°W
Last Update:
5:41 pm CST Nov 30, 2025
Forecast Valid:
6pm CST Nov 30, 2025-6pm CST Dec 7, 2025
 
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Additional Resources

Radar & Satellite Image

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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