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

72°F

22°C

Humidity 41%
Wind Speed S 18 G 25 mph
Barometer 30.28 in
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 9 Apr 11:45 am CDT
Extended Forecast for

Benton IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 78. South southwest wind 11 to 14 mph, with gusts as high as 22 mph.

    High: 78 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 57. South wind around 9 mph.

    Low: 57 °F

    Mostly Clear

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms, mainly after 3pm. Increasing clouds, with a high near 78. South southwest wind 8 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 21 mph.

    High: 78 °F

    Mostly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 56. North wind around 6 mph becoming light and variable in the evening. Chance of precipitation is 40%.

    Low: 56 °F

    Chance
    Showers

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 79. East northeast wind around 6 mph becoming south southeast in the afternoon.

    High: 79 °F

    Partly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 60. Southeast wind around 6 mph.

    Low: 60 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 82. South southwest wind 7 to 17 mph, with gusts as high as 25 mph.

    High: 82 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 66. South wind around 14 mph, with gusts as high as 25 mph.

    Low: 66 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 82. Breezy, with a south southwest wind 14 to 20 mph, with gusts as high as 28 mph.

    High: 82 °F

    Chance
    Showers and
    Breezy

Detailed Forecast

This Afternoon
Sunny, with a high near 78. South southwest wind 11 to 14 mph, with gusts as high as 22 mph.
Tonight
Mostly clear, with a low around 57. South wind around 9 mph.
Friday
A 50 percent chance of showers and thunderstorms, mainly after 3pm. Increasing clouds, with a high near 78. South southwest wind 8 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 21 mph.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 56. North wind around 6 mph becoming light and variable in the evening. Chance of precipitation is 40%.
Saturday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 79. East northeast wind around 6 mph becoming south southeast in the afternoon.
Saturday Night
Partly cloudy, with a low around 60. Southeast wind around 6 mph.
Sunday
Partly sunny, with a high near 82. South southwest wind 7 to 17 mph, with gusts as high as 25 mph.
Sunday Night
A chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 66. South wind around 14 mph, with gusts as high as 25 mph.
Monday
A chance of showers, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 82. Breezy, with a south southwest wind 14 to 20 mph, with gusts as high as 28 mph.
Monday Night
A slight chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 68. South southwest wind 11 to 14 mph, with gusts as high as 23 mph.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 84. South southwest wind 13 to 17 mph, with gusts as high as 25 mph.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. South southwest wind 10 to 13 mph, with gusts as high as 21 mph.
Wednesday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 79. South southwest wind 11 to 15 mph, with gusts as high as 22 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Benton IL
 38°N 88.93°W
Last Update:
11:27 am CDT Apr 9, 2026
Forecast Valid:
12pm CDT Apr 9, 2026-6pm CDT Apr 15, 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