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

73°F

23°C

Humidity 65%
Wind Speed SW 13 G 17 mph
Barometer 29.95 in
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 15 Apr 12:35 am CDT
Extended Forecast for

Benton IL

  • Overnight

    Overnight: Partly cloudy, with a low around 69. South southwest wind around 10 mph, with gusts as high as 22 mph.

    Low: 69 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms, mainly between 3pm and 5pm. Partly sunny, with a high near 85. South southwest wind 11 to 17 mph, with gusts as high as 29 mph.

    High: 85 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms before 4am, then showers likely and possibly a thunderstorm between 4am and 5am, then a chance of showers and thunderstorms after 5am. Low around 65. South southwest wind 9 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

    Low: 65 °F

    Chance
    Showers then
    Showers

  • Thursday

    Thursday: Showers likely, with thunderstorms also possible after 10am. Mostly cloudy, then gradually becoming sunny, with a high near 82. Southwest wind 10 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 70%.

    High: 82 °F

    Showers
    Likely

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly clear, with a low around 61. South southwest wind 3 to 7 mph. Chance of precipitation is 20%.

    Low: 61 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. Light south wind increasing to 8 to 13 mph in the morning. Winds could gust as high as 20 mph.

    High: 87 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 60. South wind 10 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.

    Low: 60 °F

    Chance
    T-storms then
    Showers
    Likely

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm. Partly sunny, with a high near 74. South southwest wind 13 to 16 mph becoming west northwest in the afternoon. Winds could gust as high as 24 mph.

    High: 74 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A chance of showers, mainly before 1am. Partly cloudy, with a low around 41. West northwest wind 9 to 11 mph, with gusts as high as 20 mph.

    Low: 41 °F

    Chance
    Showers

Detailed Forecast

Overnight
Partly cloudy, with a low around 69. South southwest wind around 10 mph, with gusts as high as 22 mph.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly between 3pm and 5pm. Partly sunny, with a high near 85. South southwest wind 11 to 17 mph, with gusts as high as 29 mph.
Wednesday Night
Showers and thunderstorms before 4am, then showers likely and possibly a thunderstorm between 4am and 5am, then a chance of showers and thunderstorms after 5am. Low around 65. South southwest wind 9 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Thursday
Showers likely, with thunderstorms also possible after 10am. Mostly cloudy, then gradually becoming sunny, with a high near 82. Southwest wind 10 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 70%.
Thursday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Mostly clear, with a low around 61. South southwest wind 3 to 7 mph. Chance of precipitation is 20%.
Friday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 87. Light south wind increasing to 8 to 13 mph in the morning. Winds could gust as high as 20 mph.
Friday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 60. South wind 10 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.
Saturday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 74. South southwest wind 13 to 16 mph becoming west northwest in the afternoon. Winds could gust as high as 24 mph.
Saturday Night
A chance of showers, mainly before 1am. Partly cloudy, with a low around 41. West northwest wind 9 to 11 mph, with gusts as high as 20 mph.
Sunday
Sunny, with a high near 64. West northwest wind 8 to 11 mph, with gusts as high as 20 mph.
Sunday Night
Clear, with a low around 41. Northwest wind 5 to 7 mph becoming light and variable after midnight.
Monday
Sunny, with a high near 70. South southeast wind 5 to 9 mph.
Monday Night
Partly cloudy, with a low around 49. South wind around 6 mph.
Tuesday
Sunny, with a high near 76. South southwest wind 7 to 13 mph, with gusts as high as 20 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:
12:22 am CDT Apr 15, 2026
Forecast Valid:
12am CDT Apr 15, 2026-6pm CDT Apr 21, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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