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

52°F

11°C

Humidity 76%
Wind Speed SW 5 mph
Barometer 30.11 in
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Wind Chill51°F (11°C)
Last update 22 Apr 5:15 am CDT
Extended Forecast for

Marion IL

  • Today

    Today: Sunny, with a high near 80. Southwest wind 6 to 15 mph, with gusts as high as 23 mph.

    High: 80 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 56. South southwest wind 5 to 10 mph becoming light south after midnight.

    Low: 56 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 81. South wind 5 to 15 mph, with gusts as high as 24 mph.

    High: 81 °F

    Sunny

  • Thursday Night

    Thursday Night: A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 64. South wind around 10 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.

    Low: 64 °F

    Mostly Clear
    then Chance
    Showers

  • Friday

    Friday: Showers and possibly a thunderstorm. High near 77. South southwest wind 10 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 90%.

    High: 77 °F

    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 57. Southwest wind 5 to 7 mph becoming light and variable after midnight. Chance of precipitation is 50%.

    Low: 57 °F

    Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: A 20 percent chance of showers. Mostly sunny, with a high near 77. North northeast wind 5 to 7 mph.

    High: 77 °F

    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 55. North northeast wind around 5 mph becoming calm in the evening.

    Low: 55 °F

    Partly Cloudy

  • Sunday

    Sunday: A slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 79. East southeast wind 5 to 8 mph.

    High: 79 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

Detailed Forecast

Today
Sunny, with a high near 80. Southwest wind 6 to 15 mph, with gusts as high as 23 mph.
Tonight
Clear, with a low around 56. South southwest wind 5 to 10 mph becoming light south after midnight.
Thursday
Sunny, with a high near 81. South wind 5 to 15 mph, with gusts as high as 24 mph.
Thursday Night
A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 64. South wind around 10 mph, with gusts as high as 21 mph. Chance of precipitation is 30%.
Friday
Showers and possibly a thunderstorm. High near 77. South southwest wind 10 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 90%.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 57. Southwest wind 5 to 7 mph becoming light and variable after midnight. Chance of precipitation is 50%.
Saturday
A 20 percent chance of showers. Mostly sunny, with a high near 77. North northeast wind 5 to 7 mph.
Saturday Night
Partly cloudy, with a low around 55. North northeast wind around 5 mph becoming calm in the evening.
Sunday
A slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 79. East southeast wind 5 to 8 mph.
Sunday Night
A chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 61. East southeast wind 7 to 11 mph, with gusts as high as 20 mph.
Monday
Showers and thunderstorms likely. Partly sunny, with a high near 79. Breezy, with a south southeast wind 16 to 20 mph, with gusts as high as 30 mph.
Monday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 55. South southwest wind 7 to 15 mph becoming west after midnight. Winds could gust as high as 23 mph.
Tuesday
Sunny, with a high near 73. West northwest wind 7 to 9 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.95°W
Last Update:
4:21 am CDT Apr 22, 2026
Forecast Valid:
5am CDT Apr 22, 2026-6pm CDT Apr 28, 2026
 
Forecast Discussion
 
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Additional Resources

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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