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

29°F

-2°C

Humidity 59%
Wind Speed SW 7 mph
Barometer 30.21 in
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Wind Chill22°F (-6°C)
Last update 30 Dec 7:15 pm CST
Extended Forecast for

Benton IL

  • Tonight

    Tonight: Mostly clear, with a low around 27. West southwest wind around 6 mph.

    Low: 27 °F

    Mostly Clear

  • Wednesday

    Wednesday: Increasing clouds, with a high near 42. West wind 6 to 10 mph.

    High: 42 °F

    Increasing
    Clouds

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 27. Light and variable wind.

    Low: 27 °F

    Partly Cloudy

  • New Year's Day

    New Year's Day: Partly sunny, with a high near 40. Calm wind becoming east northeast around 5 mph.

    High: 40 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 31. Calm wind.

    Low: 31 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 46. Calm wind becoming northeast around 6 mph in the morning.

    High: 46 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 27. North northeast wind around 6 mph.

    Low: 27 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 41. North northeast wind 3 to 6 mph.

    High: 41 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 26. Calm wind.

    Low: 26 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 27. West southwest wind around 6 mph.
Wednesday
Increasing clouds, with a high near 42. West wind 6 to 10 mph.
Wednesday Night
Partly cloudy, with a low around 27. Light and variable wind.
New Year's Day
Partly sunny, with a high near 40. Calm wind becoming east northeast around 5 mph.
Thursday Night
Mostly cloudy, with a low around 31. Calm wind.
Friday
Mostly cloudy, with a high near 46. Calm wind becoming northeast around 6 mph in the morning.
Friday Night
Mostly cloudy, with a low around 27. North northeast wind around 6 mph.
Saturday
Mostly sunny, with a high near 41. North northeast wind 3 to 6 mph.
Saturday Night
Mostly clear, with a low around 26. Calm wind.
Sunday
Partly sunny, with a high near 47. Calm wind becoming south 5 to 8 mph in the morning.
Sunday Night
Partly cloudy, with a low around 35. West southwest wind around 6 mph.
Monday
Partly sunny, with a high near 52. West southwest wind 6 to 9 mph becoming northwest in the afternoon.
Monday Night
Partly cloudy, with a low around 31. Northwest wind around 5 mph.
Tuesday
Mostly sunny, with a high near 48. Northwest wind 5 to 7 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Benton IL
 38°N 88.93°W
Last Update:
4:16 pm CST Dec 30, 2025
Forecast Valid:
7pm CST Dec 30, 2025-6pm CST Jan 6, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation