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Hazardous Weather Conditions

Current conditions at

Marion - Williamson County Regional Airport (KMWA)

Lat: 37.77°NLon: 89.01°WElev: 486ft.

Fair

86°F

30°C

Humidity 70%
Wind Speed S 5 mph
Barometer 30.09 in
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index95°F (35°C)
Last update 18 Aug 9:45 am CDT
Extended Forecast for

3 Miles SE Sesser IL

Heat Advisory August 18, 10:35am until August 19, 07:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 18, 10:35am until August 19, 07:00pm

    NOW until 7:00pm Tue

    Heat Advisory

  • Today

    High: 97 °F

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 75. East southeast wind 3 to 6 mph.

    Low: 75 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny and hot, with a high near 97. Heat index values as high as 105. Calm wind becoming northwest around 6 mph in the afternoon.

    High: 97 °F

    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 75. Light north northwest wind.

    Low: 75 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92. Light north wind increasing to 5 to 10 mph in the morning.

    High: 92 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 68. North northeast wind 6 to 9 mph.

    Low: 68 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 89. North northeast wind 6 to 10 mph.

    High: 89 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 67. North northeast wind 3 to 8 mph.

    Low: 67 °F

    Mostly Clear

Detailed Forecast

Today
Sunny and hot, with a high near 97. South southeast wind around 5 mph becoming calm in the afternoon.
Tonight
Mostly clear, with a low around 75. East southeast wind 3 to 6 mph.
Tuesday
A 30 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny and hot, with a high near 97. Heat index values as high as 105. Calm wind becoming northwest around 6 mph in the afternoon.
Tuesday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 75. Light north northwest wind.
Wednesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 92. Light north wind increasing to 5 to 10 mph in the morning.
Wednesday Night
Partly cloudy, with a low around 68. North northeast wind 6 to 9 mph.
Thursday
Mostly sunny, with a high near 89. North northeast wind 6 to 10 mph.
Thursday Night
Mostly clear, with a low around 67. North northeast wind 3 to 8 mph.
Friday
Sunny, with a high near 91. North northeast wind 3 to 6 mph.
Friday Night
Mostly clear, with a low around 68. North wind around 6 mph becoming calm in the evening.
Saturday
Sunny, with a high near 91. Calm wind becoming north northwest 5 to 7 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 65. North northwest wind 3 to 6 mph.
Sunday
Sunny, with a high near 86. Light north wind becoming north northwest 5 to 9 mph in the morning.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SE Sesser IL
 38.07°N 89.01°W
Last Update:
9:14 am CDT Aug 18, 2025
Forecast Valid:
10am CDT Aug 18, 2025-6pm CDT Aug 24, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation