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

79°F

26°C

Humidity 65%
Wind Speed S 7 mph
Barometer 30.00 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 6 Jun 10:45 am CDT
Extended Forecast for

Benton ILSimilar City Names

  • Today

    Today: A slight chance of showers and thunderstorms between 4pm and 5pm. Partly sunny, with a high near 88. Southwest wind around 9 mph. Chance of precipitation is 20%.

    High: 88 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: A slight chance of showers and thunderstorms between 7pm and 8pm. Mostly cloudy, with a low around 72. South southwest wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 20%.

    Low: 72 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Sunday

    Sunday: A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 88. Light south wind becoming south southeast 5 to 10 mph in the morning. Chance of precipitation is 30%.

    High: 88 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 72. South wind 5 to 9 mph. Chance of precipitation is 70%.

    Low: 72 °F

    Chance
    T-storms then
    Showers
    Likely

  • Monday

    Monday: Showers and possibly a thunderstorm. High near 85. South wind 8 to 11 mph. Chance of precipitation is 90%.

    High: 85 °F

    Showers

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm. Low around 72. South wind 6 to 9 mph. Chance of precipitation is 80%.

    Low: 72 °F

    T-storms then
    Showers

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 90. South southwest wind 7 to 9 mph.

    High: 90 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms. Mostly clear, with a low around 74. South southwest wind around 6 mph.

    Low: 74 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Sunny, with a high near 93. South southwest wind 6 to 9 mph.

    High: 93 °F

    Sunny

Detailed Forecast

Today
A slight chance of showers and thunderstorms between 4pm and 5pm. Partly sunny, with a high near 88. Southwest wind around 9 mph. Chance of precipitation is 20%.
Tonight
A slight chance of showers and thunderstorms between 7pm and 8pm. Mostly cloudy, with a low around 72. South southwest wind 5 to 7 mph becoming calm in the evening. Chance of precipitation is 20%.
Sunday
A slight chance of showers, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 88. Light south wind becoming south southeast 5 to 10 mph in the morning. Chance of precipitation is 30%.
Sunday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 72. South wind 5 to 9 mph. Chance of precipitation is 70%.
Monday
Showers and possibly a thunderstorm. High near 85. South wind 8 to 11 mph. Chance of precipitation is 90%.
Monday Night
Showers and possibly a thunderstorm. Low around 72. South wind 6 to 9 mph. Chance of precipitation is 80%.
Tuesday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 90. South southwest wind 7 to 9 mph.
Tuesday Night
A chance of showers and thunderstorms. Mostly clear, with a low around 74. South southwest wind around 6 mph.
Wednesday
Sunny, with a high near 93. South southwest wind 6 to 9 mph.
Wednesday Night
Clear, with a low around 76. South wind 5 to 8 mph.
Thursday
Sunny, with a high near 93. South southwest wind 5 to 11 mph.
Thursday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 76. South wind 5 to 9 mph becoming light south southwest after midnight.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 93. Southwest wind 3 to 7 mph.
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ABOUT THIS FORECAST

 
Point Forecast:
Benton ILSimilar City Names
 38°N 88.93°W
Last Update:
5:36 am CDT Jun 6, 2026
Forecast Valid:
11am CDT Jun 6, 2026-6pm CDT Jun 12, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation