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Hazardous Weather Conditions

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Partly Cloudy

70°F

21°C

Humidity 96%
Wind Speed N 3 mph
Barometer 29.99 in
Dewpoint 69°F (21°C)
Visibility 7.00 mi
Last update 15 Jun 3:55 am CDT
Extended Forecast for

Marion IL

  • Overnight

    Overnight: Patchy fog. Otherwise, mostly cloudy, with a steady temperature around 71. Calm wind.

    Low: 71 °F

    Patchy Fog

  • Sunday

    Sunday: Patchy fog before 8am. Otherwise, partly sunny, with a high near 84. Calm wind becoming north northwest around 5 mph in the afternoon.

    High: 84 °F

    Patchy Fog
    then Partly
    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 70. Light and variable wind.

    Low: 70 °F

    Mostly Cloudy

  • Monday

    Monday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 81. Light southeast wind. Chance of precipitation is 60%.

    High: 81 °F

    Showers
    Likely

  • Monday Night

    Monday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly cloudy, with a low around 69. Light and variable wind. Chance of precipitation is 20%.

    Low: 69 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88. South southwest wind 3 to 8 mph.

    High: 88 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 74. South wind 6 to 8 mph.

    Low: 74 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 88. Southwest wind 9 to 13 mph, with gusts as high as 22 mph.

    High: 88 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms likely, mainly before 1am. Mostly cloudy, with a low around 71. Southwest wind 6 to 9 mph.

    Low: 71 °F

    T-storms
    Likely

Detailed Forecast

Overnight
Patchy fog. Otherwise, mostly cloudy, with a steady temperature around 71. Calm wind.
Sunday
Patchy fog before 8am. Otherwise, partly sunny, with a high near 84. Calm wind becoming north northwest around 5 mph in the afternoon.
Sunday Night
Mostly cloudy, with a low around 70. Light and variable wind.
Monday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 81. Light southeast wind. Chance of precipitation is 60%.
Monday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly cloudy, with a low around 69. Light and variable wind. Chance of precipitation is 20%.
Tuesday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88. South southwest wind 3 to 8 mph.
Tuesday Night
A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 74. South wind 6 to 8 mph.
Wednesday
A chance of showers and thunderstorms, mainly after 1pm. Partly sunny, with a high near 88. Southwest wind 9 to 13 mph, with gusts as high as 22 mph.
Wednesday Night
Showers and thunderstorms likely, mainly before 1am. Mostly cloudy, with a low around 71. Southwest wind 6 to 9 mph.
Juneteenth
A chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 86. West wind around 6 mph.
Thursday Night
Mostly clear, with a low around 68. Calm wind.
Friday
Sunny, with a high near 90. Calm wind becoming south southwest 5 to 7 mph in the afternoon.
Friday Night
Mostly clear, with a low around 73. South wind around 5 mph.
Saturday
Sunny, with a high near 92. South southwest wind 6 to 9 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.92°W
Last Update:
2:30 am CDT Jun 15, 2025
Forecast Valid:
3am CDT Jun 15, 2025-6pm CDT Jun 21, 2025
 
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