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

49°F

9°C

Humidity 70%
Wind Speed Calm
Barometer 30.21 in
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Last update 19 Apr 9:15 pm CDT
Extended Forecast for

Benton IL

  • Tonight

    Tonight: Partly cloudy, with a low around 42. Light and variable wind becoming north northeast around 5 mph.

    Low: 42 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 68. Light and variable wind becoming east around 6 mph.

    High: 68 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 50. Southeast wind 3 to 7 mph.

    Low: 50 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 77. Southwest wind 7 to 16 mph, with gusts as high as 23 mph.

    High: 77 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 56. Southwest wind 7 to 11 mph, with gusts as high as 20 mph.

    Low: 56 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 79. Southwest wind 6 to 10 mph.

    High: 79 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 58. South wind around 7 mph.

    Low: 58 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 81. South wind 7 to 12 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 25 mph.

    High: 81 °F

    Sunny

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 64. South wind around 14 mph, with gusts as high as 23 mph.

    Low: 64 °F

    Partly Cloudy
    then Chance
    T-storms

Detailed Forecast

Tonight
Partly cloudy, with a low around 42. Light and variable wind becoming north northeast around 5 mph.
Monday
Sunny, with a high near 68. Light and variable wind becoming east around 6 mph.
Monday Night
Mostly clear, with a low around 50. Southeast wind 3 to 7 mph.
Tuesday
Mostly sunny, with a high near 77. Southwest wind 7 to 16 mph, with gusts as high as 23 mph.
Tuesday Night
Clear, with a low around 56. Southwest wind 7 to 11 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 79. Southwest wind 6 to 10 mph.
Wednesday Night
Mostly clear, with a low around 58. South wind around 7 mph.
Thursday
Sunny, with a high near 81. South wind 7 to 12 mph increasing to 13 to 18 mph in the afternoon. Winds could gust as high as 25 mph.
Thursday Night
A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 64. South wind around 14 mph, with gusts as high as 23 mph.
Friday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 77. South southwest wind 14 to 16 mph, with gusts as high as 23 mph.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 55. West southwest wind 6 to 8 mph becoming northwest after midnight.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 74. North wind 7 to 10 mph.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 54. North northwest wind around 6 mph becoming northeast after midnight.
Sunday
A chance of showers. Mostly sunny, with a high near 72. East wind 7 to 9 mph becoming northwest in the morning.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Benton IL
 38°N 88.93°W
Last Update:
3:07 pm CDT Apr 19, 2026
Forecast Valid:
9pm CDT Apr 19, 2026-6pm CDT Apr 26, 2026
 
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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