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

Marion County Airport (KMAO)

Lat: 34.18°NLon: 79.34°WElev: 92ft.

Partly Cloudy

70°F

21°C

Humidity 88%
Wind Speed Calm
Barometer 30.17 in
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 30 Aug 2:35 am EDT
Extended Forecast for

Marion SC

  • Overnight

    Overnight: Patchy fog. Otherwise, mostly cloudy, with a low around 71. Calm wind.

    Low: 71 °F

    Patchy Fog

  • Sunday

    Sunday: A chance of showers and thunderstorms, mainly after 5pm. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 88. Calm wind. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 88 °F

    Chance
    Showers and
    Patchy Fog
    then Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms, mainly before 7pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 71. Calm wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 71 °F

    Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 91. Heat index values as high as 104. Calm wind.

    High: 91 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 72. Light and variable wind.

    Low: 72 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 72.

    Low: 72 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 94.

    High: 94 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 73.

    Low: 73 °F

    Clear

Detailed Forecast

Overnight
Patchy fog. Otherwise, mostly cloudy, with a low around 71. Calm wind.
Sunday
A chance of showers and thunderstorms, mainly after 5pm. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 88. Calm wind. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night
A chance of showers and thunderstorms, mainly before 7pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 71. Calm wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday
Mostly sunny, with a high near 91. Heat index values as high as 104. Calm wind.
Monday Night
Mostly clear, with a low around 72. Light and variable wind.
Tuesday
Sunny, with a high near 92.
Tuesday Night
Clear, with a low around 72.
Wednesday
Sunny, with a high near 94.
Wednesday Night
Clear, with a low around 73.
Thursday
Sunny, with a high near 95.
Thursday Night
Mostly clear, with a low around 74.
Friday
A chance of showers and thunderstorms. Sunny, with a high near 96. Chance of precipitation is 30%.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 74. Chance of precipitation is 30%.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 94. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
Marion SC
 34.17°N 79.41°W (Elev. 52 ft)
Last Update:
2:19 am EDT Aug 30, 2026
Forecast Valid:
2am EDT Aug 30, 2026-6pm EDT Sep 5, 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