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.

Overcast

54°F

12°C

Humidity 35%
Wind Speed Calm
Barometer 30.19 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 24 Mar 10:55 pm CDT
Extended Forecast for

Benton IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 43. Light east southeast wind.

    Low: 43 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 75. Light south southeast wind becoming south southwest 6 to 11 mph in the morning.

    High: 75 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 61. South wind 8 to 13 mph, with gusts as high as 22 mph.

    Low: 61 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 86. South southwest wind 11 to 17 mph, with gusts as high as 25 mph.

    High: 86 °F

    Sunny

  • Thursday Night

    Thursday Night: A slight chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 45. South southwest wind 13 to 15 mph becoming north after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 60%.

    Low: 45 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Friday

    Friday: Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 53. North wind 14 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.

    High: 53 °F

    Showers
    Likely

  • Friday Night

    Friday Night: Mostly clear, with a low around 32. North wind 5 to 10 mph, with gusts as high as 18 mph.

    Low: 32 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 58. Light and variable wind becoming east around 6 mph in the morning.

    High: 58 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 39. Light southeast wind.

    Low: 39 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 43. Light east southeast wind.
Wednesday
Mostly sunny, with a high near 75. Light south southeast wind becoming south southwest 6 to 11 mph in the morning.
Wednesday Night
Mostly clear, with a low around 61. South wind 8 to 13 mph, with gusts as high as 22 mph.
Thursday
Sunny, with a high near 86. South southwest wind 11 to 17 mph, with gusts as high as 25 mph.
Thursday Night
A slight chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 45. South southwest wind 13 to 15 mph becoming north after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 60%.
Friday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 53. North wind 14 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 60%.
Friday Night
Mostly clear, with a low around 32. North wind 5 to 10 mph, with gusts as high as 18 mph.
Saturday
Sunny, with a high near 58. Light and variable wind becoming east around 6 mph in the morning.
Saturday Night
Partly cloudy, with a low around 39. Light southeast wind.
Sunday
Mostly sunny, with a high near 65. Light southeast wind becoming south 5 to 9 mph in the morning.
Sunday Night
Mostly cloudy, with a low around 50. South wind 7 to 9 mph.
Monday
Mostly sunny, with a high near 77. South southwest wind 9 to 14 mph, with gusts as high as 20 mph.
Monday Night
A slight chance of showers. Partly cloudy, with a low around 58. South wind around 10 mph, with gusts as high as 21 mph.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 76. South southwest wind 10 to 15 mph, with gusts as high as 22 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:
9:21 pm CDT Mar 24, 2026
Forecast Valid:
11pm CDT Mar 24, 2026-6pm CDT Mar 31, 2026
 
Forecast Discussion
 
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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