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.

Overcast

61°F

16°C

Humidity 81%
Wind Speed Calm
Barometer 30.08 in
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 3 Mar 11:55 pm CST
Extended Forecast for

Benton IL

  • Overnight

    Overnight: A slight chance of showers, then a chance of showers and thunderstorms after 3am. Cloudy, with a low around 57. Southeast wind 3 to 5 mph. Chance of precipitation is 50%.

    Low: 57 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Showers and thunderstorms before 3pm, then showers and possibly a thunderstorm, mainly after 3pm. High near 71. Southeast wind 5 to 10 mph becoming south southwest in the afternoon. Chance of precipitation is 80%.

    High: 71 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms before 10pm, then showers and possibly a thunderstorm, mainly after 10pm. Some of the storms could produce heavy rainfall. Low around 59. South wind 5 to 8 mph. Chance of precipitation is 100%.

    Low: 59 °F

    Heavy Rain

  • Thursday

    Thursday: Showers and possibly a thunderstorm before 9am, then showers between 9am and noon, then showers likely and possibly a thunderstorm after noon. High near 71. Southwest wind 7 to 11 mph. Chance of precipitation is 90%.

    High: 71 °F

    Showers then
    Showers
    Likely

  • Thursday Night

    Thursday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 59. South wind 5 to 7 mph.

    Low: 59 °F

    Chance
    Showers

  • Friday

    Friday: A 20 percent chance of showers before noon. Partly sunny, with a high near 79. South wind 8 to 16 mph, with gusts as high as 24 mph.

    High: 79 °F

    Slight Chance
    Showers then
    Mostly Sunny

  • Friday Night

    Friday Night: A slight chance of showers, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 62. South wind 10 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 70%.

    Low: 62 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Saturday

    Saturday: Showers and possibly a thunderstorm before noon, then a chance of showers. Mostly cloudy, with a high near 71. South southwest wind 6 to 11 mph becoming west northwest in the afternoon. Winds could gust as high as 20 mph.

    High: 71 °F

    Showers

  • Saturday Night

    Saturday Night: A slight chance of showers after midnight. Partly cloudy, with a low around 46. West northwest wind around 5 mph becoming calm in the evening.

    Low: 46 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

Detailed Forecast

Overnight
A slight chance of showers, then a chance of showers and thunderstorms after 3am. Cloudy, with a low around 57. Southeast wind 3 to 5 mph. Chance of precipitation is 50%.
Wednesday
Showers and thunderstorms before 3pm, then showers and possibly a thunderstorm, mainly after 3pm. High near 71. Southeast wind 5 to 10 mph becoming south southwest in the afternoon. Chance of precipitation is 80%.
Wednesday Night
Showers and thunderstorms before 10pm, then showers and possibly a thunderstorm, mainly after 10pm. Some of the storms could produce heavy rainfall. Low around 59. South wind 5 to 8 mph. Chance of precipitation is 100%.
Thursday
Showers and possibly a thunderstorm before 9am, then showers between 9am and noon, then showers likely and possibly a thunderstorm after noon. High near 71. Southwest wind 7 to 11 mph. Chance of precipitation is 90%.
Thursday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 59. South wind 5 to 7 mph.
Friday
A 20 percent chance of showers before noon. Partly sunny, with a high near 79. South wind 8 to 16 mph, with gusts as high as 24 mph.
Friday Night
A slight chance of showers, then showers likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 62. South wind 10 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 70%.
Saturday
Showers and possibly a thunderstorm before noon, then a chance of showers. Mostly cloudy, with a high near 71. South southwest wind 6 to 11 mph becoming west northwest in the afternoon. Winds could gust as high as 20 mph.
Saturday Night
A slight chance of showers after midnight. Partly cloudy, with a low around 46. West northwest wind around 5 mph becoming calm in the evening.
Sunday
A slight chance of showers before noon. Mostly sunny, with a high near 67. Calm wind becoming southwest 5 to 7 mph in the morning.
Sunday Night
A slight chance of showers. Mostly clear, with a low around 50. Southwest wind around 5 mph.
Monday
A slight chance of showers. Sunny, with a high near 75. South southwest wind 5 to 10 mph.
Monday Night
A chance of showers and thunderstorms. Mostly clear, with a low around 58. South southwest wind 8 to 10 mph, with gusts as high as 20 mph.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 77. South southwest wind 10 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:
9:46 pm CST Mar 3, 2026
Forecast Valid:
12am CST Mar 4, 2026-6pm CDT Mar 10, 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