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

54°F

12°C

Humidity 82%
Wind Speed SW 5 mph
Barometer 29.97 in
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Wind Chill53°F (12°C)
Last update 7 Oct 2:55 am CDT
Extended Forecast for

Benton IL

  • Overnight

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

    Low: 52 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 87. Light south southwest wind becoming west southwest 5 to 9 mph in the morning.

    High: 87 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 57. Southwest wind around 5 mph becoming calm in the evening.

    Low: 57 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 85. Calm wind becoming east northeast around 5 mph in the afternoon.

    High: 85 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 53. Calm wind.

    Low: 53 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 87. Calm wind becoming south southeast 5 to 9 mph in the morning.

    High: 87 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 59. Southeast wind 3 to 5 mph.

    Low: 59 °F

    Mostly Clear

  • Saturday

    Saturday: A chance of showers after 1pm. Mostly sunny, with a high near 84. Light south wind becoming south southeast 6 to 11 mph in the morning.

    High: 84 °F

    Mostly Sunny
    then Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers, with thunderstorms also possible after 1am. Partly cloudy, with a low around 58. East northeast wind 7 to 9 mph.

    Low: 58 °F

    Chance
    Showers

Detailed Forecast

Overnight
Clear, with a low around 52. Calm wind.
Wednesday
Sunny, with a high near 87. Light south southwest wind becoming west southwest 5 to 9 mph in the morning.
Wednesday Night
Clear, with a low around 57. Southwest wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 85. Calm wind becoming east northeast around 5 mph in the afternoon.
Thursday Night
Clear, with a low around 53. Calm wind.
Friday
Sunny, with a high near 87. Calm wind becoming south southeast 5 to 9 mph in the morning.
Friday Night
Mostly clear, with a low around 59. Southeast wind 3 to 5 mph.
Saturday
A chance of showers after 1pm. Mostly sunny, with a high near 84. Light south wind becoming south southeast 6 to 11 mph in the morning.
Saturday Night
A chance of showers, with thunderstorms also possible after 1am. Partly cloudy, with a low around 58. East northeast wind 7 to 9 mph.
Sunday
A chance of showers. Partly sunny, with a high near 77. East northeast wind 10 to 15 mph becoming north northwest in the afternoon. Winds could gust as high as 18 mph.
Sunday Night
Mostly cloudy, with a low around 57. North northwest wind around 6 mph becoming calm in the evening.
Columbus Day
Mostly sunny, with a high near 82. Calm wind becoming west 5 to 8 mph in the morning.
Monday Night
A slight chance of showers. Partly cloudy, with a low around 58. South wind around 5 mph.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 83. Southwest wind 5 to 14 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Benton IL
 38°N 88.93°W
Last Update:
1:26 am CDT Oct 7, 2026
Forecast Valid:
3am CDT Oct 7, 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