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

43°F

6°C

Humidity 57%
Wind Speed NE 6 mph
Barometer 30.39 in
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 23 Mar 8:35 pm CDT
Extended Forecast for

Benton IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 37. East northeast wind 5 to 7 mph.

    Low: 37 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 63. East southeast wind around 6 mph.

    High: 63 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 43. East southeast wind 3 to 6 mph.

    Low: 43 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 74. Light south southeast wind becoming south southwest 5 to 10 mph in the morning.

    High: 74 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 61. South wind 7 to 10 mph, with gusts as high as 20 mph.

    Low: 61 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 85. South southwest wind 10 to 16 mph, with gusts as high as 24 mph.

    High: 85 °F

    Sunny

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 44. South southwest wind around 17 mph becoming north after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 60%.

    Low: 44 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Friday

    Friday: Showers likely, mainly before 1pm. Mostly cloudy, with a high near 52. North wind 16 to 18 mph, with gusts as high as 25 mph.

    High: 52 °F

    Showers
    Likely

  • Friday Night

    Friday Night: Partly cloudy, with a low around 32. North wind 9 to 15 mph, with gusts as high as 21 mph.

    Low: 32 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 37. East northeast wind 5 to 7 mph.
Tuesday
Mostly sunny, with a high near 63. East southeast wind around 6 mph.
Tuesday Night
Partly cloudy, with a low around 43. East southeast wind 3 to 6 mph.
Wednesday
Mostly sunny, with a high near 74. Light south southeast wind becoming south southwest 5 to 10 mph in the morning.
Wednesday Night
Partly cloudy, with a low around 61. South wind 7 to 10 mph, with gusts as high as 20 mph.
Thursday
Sunny, with a high near 85. South southwest wind 10 to 16 mph, with gusts as high as 24 mph.
Thursday Night
A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 44. South southwest wind around 17 mph becoming north after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 60%.
Friday
Showers likely, mainly before 1pm. Mostly cloudy, with a high near 52. North wind 16 to 18 mph, with gusts as high as 25 mph.
Friday Night
Partly cloudy, with a low around 32. North wind 9 to 15 mph, with gusts as high as 21 mph.
Saturday
Sunny, with a high near 57. Northeast wind 5 to 8 mph.
Saturday Night
Partly cloudy, with a low around 37. Light southeast wind.
Sunday
Mostly sunny, with a high near 65. South wind 3 to 8 mph.
Sunday Night
Mostly cloudy, with a low around 48. South southeast wind 5 to 7 mph.
Monday
A slight chance of showers. Mostly sunny, with a high near 71. South wind 7 to 11 mph, with gusts as high as 18 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:
8:16 pm CDT Mar 23, 2026
Forecast Valid:
8pm CDT Mar 23, 2026-6pm CDT Mar 30, 2026
 
Forecast Discussion
 
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Additional Resources

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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