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

82°F

28°C

Humidity 72%
Wind Speed Calm
Barometer 30.03 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 18 Aug 10:15 pm CDT
Extended Forecast for

Ozark IL

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

    NOW until 7:00pm Tue

    Heat Advisory

  • Tonight

    Low: 75 °F

    Clear

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 97. Heat index values as high as 106. Calm wind.

    High: 97 °F

    Sunny then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72. Calm wind.

    Low: 72 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90. Calm wind becoming north around 6 mph in the afternoon.

    High: 90 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 69. North northeast wind 3 to 6 mph.

    Low: 69 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 88. North northeast wind around 6 mph.

    High: 88 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 67. North northeast wind around 5 mph becoming calm in the evening.

    Low: 67 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 91. Light north northeast wind.

    High: 91 °F

    Sunny

Detailed Forecast

Tonight
Clear, with a low around 75. Calm wind.
Tuesday
A 30 percent chance of showers and thunderstorms after 1pm. Sunny and hot, with a high near 97. Heat index values as high as 106. Calm wind.
Tuesday Night
A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 72. Calm wind.
Wednesday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90. Calm wind becoming north around 6 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 69. North northeast wind 3 to 6 mph.
Thursday
Mostly sunny, with a high near 88. North northeast wind around 6 mph.
Thursday Night
Mostly clear, with a low around 67. North northeast wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 91. Light north northeast wind.
Friday Night
Mostly clear, with a low around 67. Calm wind.
Saturday
Sunny, with a high near 90. Calm wind becoming north northwest around 5 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 64. Light north wind.
Sunday
Sunny, with a high near 84. Calm wind becoming north around 6 mph in the morning.
Sunday Night
Mostly clear, with a low around 59. North wind around 5 mph becoming calm in the evening.
Monday
Mostly sunny, with a high near 81. Calm wind becoming north around 5 mph in the afternoon.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Ozark IL
 37.5°N 88.76°W
Last Update:
8:15 pm CDT Aug 18, 2025
Forecast Valid:
10pm CDT Aug 18, 2025-6pm CDT Aug 25, 2025
 
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