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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

2 Miles NNW Valier IL

Extreme Heat Warning September 2, 11:48pm until September 5, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning September 2, 11:48pm until September 5, 08:00pm

    NOW until 8:00pm Sat

    Extreme Heat Warning

  • Tonight

    Low: 76 °F

    Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 100. Heat index values as high as 107. Calm wind becoming southwest 5 to 7 mph in the morning.

    High: 100 °F

    Hot

  • Thursday Night

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

    Low: 77 °F

    Clear

  • Friday

    Friday: Sunny and hot, with a high near 100. Heat index values as high as 107. Light south southwest wind.

    High: 100 °F

    Hot

  • Friday Night

    Friday Night: Mostly clear, with a low around 76. Calm wind.

    Low: 76 °F

    Mostly Clear

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 98. Light and variable wind.

    High: 98 °F

    Sunny then
    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 73. Calm wind.

    Low: 73 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 96. Calm wind becoming northeast 5 to 7 mph in the afternoon.

    High: 96 °F

    Sunny

Detailed Forecast

Tonight
Clear, with a low around 76. Calm wind.
Thursday
Sunny and hot, with a high near 100. Heat index values as high as 107. Calm wind becoming southwest 5 to 7 mph in the morning.
Thursday Night
Clear, with a low around 77. Light south wind.
Friday
Sunny and hot, with a high near 100. Heat index values as high as 107. Light south southwest wind.
Friday Night
Mostly clear, with a low around 76. Calm wind.
Saturday
A 20 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 98. Light and variable wind.
Saturday Night
Partly cloudy, with a low around 73. Calm wind.
Sunday
Sunny, with a high near 96. Calm wind becoming northeast 5 to 7 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 70. Northeast wind around 6 mph becoming calm after midnight.
Labor Day
Sunny, with a high near 95. Calm wind becoming east 5 to 7 mph in the afternoon.
Monday Night
Mostly clear, with a low around 71. East wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 95. Calm wind becoming south southwest 5 to 7 mph in the morning.
Tuesday Night
Mostly clear, with a low around 73. South wind around 6 mph.
Wednesday
Sunny and hot, with a high near 97. Southwest wind 6 to 11 mph.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNW Valier IL
 38.05°N 89.04°W
Last Update:
11:11 pm CDT Sep 2, 2026
Forecast Valid:
11pm CDT Sep 2, 2026-6pm CDT Sep 9, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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