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.

Partly Cloudy

91°F

33°C

Humidity 63%
Wind Speed S 14 mph
Barometer 30.03 in
Dewpoint 77°F (25°C)
Visibility 10.00 mi
Heat Index104°F (40°C)
Last update 29 Jun 12:47 pm CDT
Extended Forecast for

Spillertown IL

Extreme Heat Warning June 29, 01:24pm until July 3, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning June 29, 01:24pm until July 3, 08:00pm

    NOW until 8:00pm Fri

    Extreme Heat Warning

  • This Afternoon

    High: 95 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 75. South wind 3 to 8 mph.

    Low: 75 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 96. Heat index values as high as 107. Light south southwest wind increasing to 5 to 9 mph in the morning.

    High: 96 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 74. South wind around 6 mph becoming calm in the evening.

    Low: 74 °F

    Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 98. Calm wind becoming south southwest 5 to 7 mph in the afternoon.

    High: 98 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 76. Light south wind.

    Low: 76 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 99. Calm wind becoming south southwest around 6 mph in the afternoon.

    High: 99 °F

    Hot

  • Thursday Night

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

    Low: 77 °F

    Mostly Clear

Detailed Forecast

This Afternoon
Sunny, with a high near 95. Heat index values as high as 106. South southwest wind around 11 mph, with gusts as high as 18 mph.
Tonight
Mostly clear, with a low around 75. South wind 3 to 8 mph.
Tuesday
Sunny, with a high near 96. Heat index values as high as 107. Light south southwest wind increasing to 5 to 9 mph in the morning.
Tuesday Night
Clear, with a low around 74. South wind around 6 mph becoming calm in the evening.
Wednesday
Sunny and hot, with a high near 98. Calm wind becoming south southwest 5 to 7 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 76. Light south wind.
Thursday
Sunny and hot, with a high near 99. Calm wind becoming south southwest around 6 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 77. Light and variable wind.
Friday
A slight chance of showers and thunderstorms. Mostly sunny and hot, with a high near 97. Calm wind becoming south southwest around 6 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 77. Light and variable wind.
Independence Day
A chance of showers and thunderstorms. Mostly sunny, with a high near 96. Calm wind becoming west southwest around 5 mph in the afternoon.
Saturday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 76. Calm wind.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 93. Calm wind becoming southwest around 6 mph in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Spillertown IL
 37.76°N 88.92°W
Last Update:
12:16 pm CDT Jun 29, 2026
Forecast Valid:
1pm CDT Jun 29, 2026-6pm CDT Jul 5, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation