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.

Overcast

76°F

24°C

Humidity 98%
Wind Speed S 5 mph
Barometer 29.90 in
Dewpoint 76°F (24°C)
Visibility 7.00 mi
Heat Index75°F (24°C)
Last update 28 Jun 1:55 am CDT
Extended Forecast for

Spillertown IL

Extreme Heat Watch June 29, 11:00am until July 2, 08:00pm
Flood Watch June 28, 02:10am until June 28, 07:00am
Heat Advisory June 28, 12:00pm until June 28, 08:00pm
Click here for hazard details and duration
Extreme Heat Watch
Flood Watch
Heat Advisory
  •  
    Flood Watch June 28, 02:10am until June 28, 07:00am

    NOW until 7:00am Sun

    Flood Watch

  • Overnight

    Low: 72 °F

    Chance
    T-storms

  • Sunday

    Sunday: Sunny, with a high near 92. Heat index values as high as 106. Calm wind becoming south southwest 5 to 9 mph in the morning.

    High: 92 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 74. South wind 3 to 7 mph.

    Low: 74 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 94. Heat index values as high as 107. South southwest wind 5 to 10 mph.

    High: 94 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 75. South southwest wind 3 to 7 mph.

    Low: 75 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 96. Calm wind becoming south southwest 5 to 8 mph in the morning.

    High: 96 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 75. South wind around 5 mph becoming calm in the evening.

    Low: 75 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 96. Calm wind becoming south around 6 mph in the afternoon.

    High: 96 °F

    Sunny

Detailed Forecast

Overnight
A 50 percent chance of showers and thunderstorms, mainly before 5am. Mostly cloudy, with a low around 72. Calm wind.
Sunday
Sunny, with a high near 92. Heat index values as high as 106. Calm wind becoming south southwest 5 to 9 mph in the morning.
Sunday Night
Mostly clear, with a low around 74. South wind 3 to 7 mph.
Monday
Sunny, with a high near 94. Heat index values as high as 107. South southwest wind 5 to 10 mph.
Monday Night
Clear, with a low around 75. South southwest wind 3 to 7 mph.
Tuesday
Sunny, with a high near 96. Calm wind becoming south southwest 5 to 8 mph in the morning.
Tuesday Night
Clear, with a low around 75. South wind around 5 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 96. Calm wind becoming south around 6 mph in the afternoon.
Wednesday Night
Clear, with a low around 76. Light and variable wind.
Thursday
Sunny, with a high near 95. Calm wind becoming south southwest around 5 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 76. Calm wind.
Friday
A slight chance of showers and thunderstorms. Sunny, with a high near 94. Calm wind becoming south around 5 mph.
Friday Night
Mostly clear, with a low around 76. Calm wind.
Independence Day
Sunny, with a high near 94. Light and variable wind.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Spillertown IL
 37.76°N 88.92°W
Last Update:
1:26 am CDT Jun 28, 2026
Forecast Valid:
2am CDT Jun 28, 2026-6pm CDT Jul 4, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation