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

58°F

14°C

Humidity 95%
Wind Speed S 12 mph
Barometer 29.69 in
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 18 Feb 8:55 pm CST
Extended Forecast for

Benton IL

  • Tonight

    Tonight: Increasing clouds, with a low around 54. South wind around 6 mph.

    Low: 54 °F

    Increasing
    Clouds

  • Thursday

    Thursday: A chance of showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 3pm, then a chance of showers and thunderstorms after 3pm. Mostly cloudy, with a high near 70. South wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 60%.

    High: 70 °F

    Chance
    Showers then
    Showers
    Likely

  • Thursday Night

    Thursday Night: A 20 percent chance of showers before 9pm. Mostly clear, with a low around 42. West southwest wind 11 to 13 mph, with gusts as high as 24 mph.

    Low: 42 °F

    Slight Chance
    Showers then
    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 55. West wind 6 to 14 mph, with gusts as high as 23 mph.

    High: 55 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 33. North wind 3 to 5 mph.

    Low: 33 °F

    Partly Cloudy

  • Saturday

    Saturday: A 20 percent chance of showers after noon. Mostly sunny, with a high near 48. North northwest wind 5 to 9 mph.

    High: 48 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Saturday Night

    Saturday Night: A slight chance of rain and snow showers before midnight. Mostly clear, with a low around 25. Northwest wind 7 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 25 °F

    Slight Chance
    Rain/Snow
    then Mostly
    Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 41. Northwest wind 10 to 16 mph, with gusts as high as 24 mph.

    High: 41 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 21. North northwest wind 9 to 11 mph, with gusts as high as 20 mph.

    Low: 21 °F

    Mostly Clear

Detailed Forecast

Tonight
Increasing clouds, with a low around 54. South wind around 6 mph.
Thursday
A chance of showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 3pm, then a chance of showers and thunderstorms after 3pm. Mostly cloudy, with a high near 70. South wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 33 mph. Chance of precipitation is 60%.
Thursday Night
A 20 percent chance of showers before 9pm. Mostly clear, with a low around 42. West southwest wind 11 to 13 mph, with gusts as high as 24 mph.
Friday
Sunny, with a high near 55. West wind 6 to 14 mph, with gusts as high as 23 mph.
Friday Night
Partly cloudy, with a low around 33. North wind 3 to 5 mph.
Saturday
A 20 percent chance of showers after noon. Mostly sunny, with a high near 48. North northwest wind 5 to 9 mph.
Saturday Night
A slight chance of rain and snow showers before midnight. Mostly clear, with a low around 25. Northwest wind 7 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Sunday
Mostly sunny, with a high near 41. Northwest wind 10 to 16 mph, with gusts as high as 24 mph.
Sunday Night
Mostly clear, with a low around 21. North northwest wind 9 to 11 mph, with gusts as high as 20 mph.
Monday
Sunny, with a high near 40. North northwest wind 6 to 11 mph.
Monday Night
Mostly clear, with a low around 21. Light and variable wind.
Tuesday
Mostly sunny, with a high near 48. Light south wind increasing to 6 to 11 mph in the morning. Winds could gust as high as 18 mph.
Tuesday Night
Mostly cloudy, with a low around 37. South southwest wind 10 to 14 mph, with gusts as high as 23 mph.
Wednesday
A chance of showers. Partly sunny, with a high near 57. Southwest wind 13 to 16 mph, with gusts as high as 24 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:
5:41 pm CST Feb 18, 2026
Forecast Valid:
9pm CST Feb 18, 2026-6pm CST Feb 25, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation