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.

Fair

59°F

15°C

Humidity 68%
Wind Speed S 2 mph
Barometer 30.01 in
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 6 Oct 8:35 pm CDT
Extended Forecast for

Benton IL

  • Tonight

    Tonight: Clear, with a low around 52. Calm wind.

    Low: 52 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 88. Calm wind becoming west southwest 5 to 9 mph in the morning.

    High: 88 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 57. Southwest wind around 6 mph becoming calm in the evening.

    Low: 57 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 85. Calm wind becoming north northeast 5 to 7 mph in the morning.

    High: 85 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 53. North wind around 5 mph becoming calm in the evening.

    Low: 53 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 85. East southeast wind 3 to 8 mph.

    High: 85 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 57. East southeast wind around 5 mph becoming calm in the evening.

    Low: 57 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 88. Light south southeast wind becoming south 8 to 13 mph in the morning.

    High: 88 °F

    Sunny

  • Saturday Night

    Saturday Night: A chance of showers, with thunderstorms also possible after 1am. Partly cloudy, with a low around 58. East southeast wind around 7 mph.

    Low: 58 °F

    Chance
    Showers

Detailed Forecast

Tonight
Clear, with a low around 52. Calm wind.
Wednesday
Sunny, with a high near 88. Calm wind becoming west southwest 5 to 9 mph in the morning.
Wednesday Night
Mostly clear, with a low around 57. Southwest wind around 6 mph becoming calm in the evening.
Thursday
Sunny, with a high near 85. Calm wind becoming north northeast 5 to 7 mph in the morning.
Thursday Night
Clear, with a low around 53. North wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 85. East southeast wind 3 to 8 mph.
Friday Night
Clear, with a low around 57. East southeast wind around 5 mph becoming calm in the evening.
Saturday
Sunny, with a high near 88. Light south southeast wind becoming south 8 to 13 mph in the morning.
Saturday Night
A chance of showers, with thunderstorms also possible after 1am. Partly cloudy, with a low around 58. East southeast wind around 7 mph.
Sunday
A chance of showers. Partly sunny, with a high near 77. East wind 7 to 10 mph.
Sunday Night
Mostly cloudy, with a low around 57. North northeast wind around 5 mph becoming calm in the evening.
Columbus Day
Mostly sunny, with a high near 82. Calm wind becoming north northwest 5 to 9 mph in the morning.
Monday Night
A slight chance of showers. Partly cloudy, with a low around 58. East wind around 6 mph becoming light and variable after midnight.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 83. South southwest wind 5 to 11 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Benton IL
 38°N 88.93°W
Last Update:
7:20 pm CDT Oct 6, 2026
Forecast Valid:
8pm CDT Oct 6, 2026-6pm CDT Oct 13, 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