National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Fair

73°F

23°C

Humidity 86%
Wind Speed Calm
Barometer 30.04 in
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 31 Aug 2:35 am CDT
Extended Forecast for

3 Miles NW Benton IL

Heat Advisory August 31, 10:00am until September 4, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • Overnight

    Overnight: Mostly clear, with a low around 74. South wind around 6 mph.

    Low: 74 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 96. South southwest wind 6 to 10 mph.

    High: 96 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 76. South wind 5 to 7 mph.

    Low: 76 °F

    Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 98. South southwest wind around 6 mph.

    High: 98 °F

    Hot

  • Tuesday Night

    Tuesday Night: Clear, with a low around 76. South wind 3 to 6 mph.

    Low: 76 °F

    Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 99. Southwest wind 3 to 7 mph.

    High: 99 °F

    Hot

  • Wednesday Night

    Wednesday Night: Clear, with a low around 78. South southwest wind 3 to 6 mph.

    Low: 78 °F

    Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 99. Southwest wind 3 to 5 mph.

    High: 99 °F

    Hot

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 77. Light south wind.

    Low: 77 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 74. South wind around 6 mph.
Monday
Sunny, with a high near 96. South southwest wind 6 to 10 mph.
Monday Night
Clear, with a low around 76. South wind 5 to 7 mph.
Tuesday
Sunny and hot, with a high near 98. South southwest wind around 6 mph.
Tuesday Night
Clear, with a low around 76. South wind 3 to 6 mph.
Wednesday
Sunny and hot, with a high near 99. Southwest wind 3 to 7 mph.
Wednesday Night
Clear, with a low around 78. South southwest wind 3 to 6 mph.
Thursday
Sunny and hot, with a high near 99. Southwest wind 3 to 5 mph.
Thursday Night
Mostly clear, with a low around 77. Light south wind.
Friday
A slight chance of showers and thunderstorms after 1pm. Sunny, with a high near 93. Light and variable wind.
Friday Night
Mostly clear, with a low around 75. Calm wind.
Saturday
A slight chance of showers and thunderstorms. Sunny, with a high near 93. Calm wind becoming northeast around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 74. Light east wind.
Sunday
Sunny, with a high near 91. Calm wind becoming northeast 5 to 7 mph in the morning.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NW Benton IL
 38.05°N 88.96°W
Last Update:
1:26 am CDT Aug 31, 2026
Forecast Valid:
2am CDT Aug 31, 2026-6pm CDT Sep 6, 2026
 
Forecast Discussion
 
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Additional Resources

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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