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

46°F

8°C

Humidity 63%
Wind Speed S 5 mph
Barometer 30.06 in
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 19 Mar 4:15 am CDT
Extended Forecast for

Benton IL

  • Today

    Today: Mostly sunny, with a high near 72. South southwest wind 3 to 7 mph.

    High: 72 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 52. Calm wind becoming south around 5 mph after midnight.

    Low: 52 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 79. Southwest wind 6 to 9 mph.

    High: 79 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 53. Southwest wind around 6 mph becoming light and variable after midnight.

    Low: 53 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 79. Calm wind becoming northwest around 5 mph in the afternoon.

    High: 79 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 58. Calm wind becoming south around 6 mph in the evening.

    Low: 58 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 84. South southwest wind 8 to 14 mph, with gusts as high as 22 mph.

    High: 84 °F

    Sunny

  • Sunday Night

    Sunday Night: A slight chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 42. West southwest wind around 14 mph becoming north after midnight. Winds could gust as high as 23 mph.

    Low: 42 °F

    Slight Chance
    T-storms

  • Monday

    Monday: Sunny, with a high near 57. North wind 10 to 13 mph, with gusts as high as 21 mph.

    High: 57 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 72. South southwest wind 3 to 7 mph.
Tonight
Mostly clear, with a low around 52. Calm wind becoming south around 5 mph after midnight.
Friday
Sunny, with a high near 79. Southwest wind 6 to 9 mph.
Friday Night
Partly cloudy, with a low around 53. Southwest wind around 6 mph becoming light and variable after midnight.
Saturday
Sunny, with a high near 79. Calm wind becoming northwest around 5 mph in the afternoon.
Saturday Night
Clear, with a low around 58. Calm wind becoming south around 6 mph in the evening.
Sunday
Sunny, with a high near 84. South southwest wind 8 to 14 mph, with gusts as high as 22 mph.
Sunday Night
A slight chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 42. West southwest wind around 14 mph becoming north after midnight. Winds could gust as high as 23 mph.
Monday
Sunny, with a high near 57. North wind 10 to 13 mph, with gusts as high as 21 mph.
Monday Night
Partly cloudy, with a low around 36. East northeast wind around 6 mph.
Tuesday
Partly sunny, with a high near 60. East southeast wind around 6 mph.
Tuesday Night
Mostly cloudy, with a low around 40. East wind 3 to 5 mph.
Wednesday
Mostly sunny, with a high near 70. East wind 5 to 10 mph becoming south in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Benton IL
 38°N 88.93°W
Last Update:
1:26 am CDT Mar 19, 2026
Forecast Valid:
4am CDT Mar 19, 2026-6pm CDT Mar 25, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation