National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Marion County Airport (KMAO)

Lat: 34.18°NLon: 79.34°WElev: 92ft.

Fair

79°F

26°C

Humidity 74%
Wind Speed Calm
Barometer 30.05 in
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 1 Sep 9:55 pm EDT
Extended Forecast for

Marion SC

Heat Advisory September 2, 11:00am until September 2, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • Tonight

    Tonight: Clear, with a low around 74. Light southwest wind.

    Low: 74 °F

    Clear

  • Wednesday

    Wednesday: Patchy fog before 8am. Otherwise, sunny, with a high near 96. Heat index values as high as 108. Calm wind.

    High: 96 °F

    Patchy Fog
    then Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 74. South wind around 5 mph becoming calm in the evening.

    Low: 74 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 95. Heat index values as high as 107. Light southwest wind.

    High: 95 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 74. South wind around 5 mph becoming calm in the evening.

    Low: 74 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 96.

    High: 96 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 74.

    Low: 74 °F

    Mostly Clear

  • Saturday

    Saturday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 96. Chance of precipitation is 40%.

    High: 96 °F

    Sunny then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 72. Chance of precipitation is 50%.

    Low: 72 °F

    Chance
    T-storms

Detailed Forecast

Tonight
Clear, with a low around 74. Light southwest wind.
Wednesday
Patchy fog before 8am. Otherwise, sunny, with a high near 96. Heat index values as high as 108. Calm wind.
Wednesday Night
Mostly clear, with a low around 74. South wind around 5 mph becoming calm in the evening.
Thursday
Sunny, with a high near 95. Heat index values as high as 107. Light southwest wind.
Thursday Night
Clear, with a low around 74. South wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 96.
Friday Night
Mostly clear, with a low around 74.
Saturday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 96. Chance of precipitation is 40%.
Saturday Night
A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 72. Chance of precipitation is 50%.
Sunday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 89. Chance of precipitation is 50%.
Sunday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 68. Chance of precipitation is 30%.
Labor Day
Mostly sunny, with a high near 87.
Monday Night
Partly cloudy, with a low around 68.
Tuesday
Mostly sunny, with a high near 88.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Marion SC
 34.17°N 79.41°W (Elev. 52 ft)
Last Update:
6:00 pm EDT Sep 1, 2026
Forecast Valid:
10pm EDT Sep 1, 2026-6pm EDT Sep 8, 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