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.

Partly Cloudy

82°F

28°C

Humidity 55%
Wind Speed SW 6 mph
Barometer 30.01 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 19 Jun 5:47 pm CDT
Extended Forecast for

Marion IL

  • Tonight

    Tonight: Clear, with a low around 67. Light and variable wind.

    Low: 67 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 89. Calm wind becoming south southwest 5 to 8 mph in the morning.

    High: 89 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 74. South wind around 6 mph.

    Low: 74 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 94. South southwest wind 7 to 11 mph, with gusts as high as 20 mph.

    High: 94 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 76. South wind 6 to 8 mph.

    Low: 76 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 95. South southwest wind 6 to 9 mph.

    High: 95 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 75. South wind 3 to 6 mph.

    Low: 75 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 94. South wind 3 to 6 mph.

    High: 94 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 76. Light south wind.

    Low: 76 °F

    Mostly Clear

Detailed Forecast

Tonight
Clear, with a low around 67. Light and variable wind.
Friday
Sunny, with a high near 89. Calm wind becoming south southwest 5 to 8 mph in the morning.
Friday Night
Mostly clear, with a low around 74. South wind around 6 mph.
Saturday
Sunny, with a high near 94. South southwest wind 7 to 11 mph, with gusts as high as 20 mph.
Saturday Night
Clear, with a low around 76. South wind 6 to 8 mph.
Sunday
Sunny, with a high near 95. South southwest wind 6 to 9 mph.
Sunday Night
Clear, with a low around 75. South wind 3 to 6 mph.
Monday
Sunny, with a high near 94. South wind 3 to 6 mph.
Monday Night
Mostly clear, with a low around 76. Light south wind.
Tuesday
A slight chance of showers and thunderstorms before 1pm. Sunny, with a high near 94. Calm wind becoming south around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 75. Light south wind.
Wednesday
Sunny, with a high near 93. Calm wind becoming south southwest around 6 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 75. Light south wind.
Thursday
A slight chance of showers and thunderstorms. Sunny, with a high near 93. Calm wind becoming southwest 5 to 7 mph in the afternoon.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Marion IL
 37.73°N 88.92°W
Last Update:
5:46 pm CDT Jun 19, 2025
Forecast Valid:
6pm CDT Jun 19, 2025-6pm CDT Jun 26, 2025
 
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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