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.

Mostly Cloudy

86°F

30°C

Humidity 59%
Wind Speed N 15 mph
Barometer 30.06 in
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index91°F (33°C)
Last update 12 Jul 5:45 pm CDT
Extended Forecast for

Benton ILSimilar City Names

  • Tonight

    Tonight: Mostly clear, with a low around 68. North northeast wind 3 to 6 mph.

    Low: 68 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 87. North northeast wind 5 to 11 mph.

    High: 87 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 69. North northeast wind 3 to 7 mph.

    Low: 69 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 89. Light northeast wind becoming east northeast 5 to 9 mph in the morning.

    High: 89 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 70. Light and variable wind.

    Low: 70 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 91. Light and variable wind.

    High: 91 °F

    Sunny then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 71. Calm wind.

    Low: 71 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 92. Calm wind.

    High: 92 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 73. Calm wind.

    Low: 73 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 68. North northeast wind 3 to 6 mph.
Monday
Sunny, with a high near 87. North northeast wind 5 to 11 mph.
Monday Night
Clear, with a low around 69. North northeast wind 3 to 7 mph.
Tuesday
Sunny, with a high near 89. Light northeast wind becoming east northeast 5 to 9 mph in the morning.
Tuesday Night
Mostly clear, with a low around 70. Light and variable wind.
Wednesday
A 30 percent chance of showers and thunderstorms after 1pm. Sunny, with a high near 91. Light and variable wind.
Wednesday Night
Mostly clear, with a low around 71. Calm wind.
Thursday
Sunny, with a high near 92. Calm wind.
Thursday Night
Mostly clear, with a low around 73. Calm wind.
Friday
Sunny, with a high near 93. Calm wind becoming west 5 to 7 mph in the afternoon.
Friday Night
Mostly clear, with a low around 73. South southwest wind 3 to 5 mph.
Saturday
Sunny, with a high near 93. West southwest wind 5 to 8 mph.
Saturday Night
Partly cloudy, with a low around 73. South southwest wind 3 to 5 mph.
Sunday
Sunny, with a high near 93. West southwest wind 5 to 9 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Benton ILSimilar City Names
 38°N 88.93°W
Last Update:
6:00 pm CDT Jul 12, 2026
Forecast Valid:
7pm CDT Jul 12, 2026-6pm CDT Jul 19, 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