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.

Fog

77°F

25°C

Humidity 89%
Wind Speed Calm
Barometer 29.95 in
Dewpoint 73°F (23°C)
Visibility 0.50 mi
Heat Index78°F (26°C)
Last update 20 Aug 4:15 am EDT
Extended Forecast for

3 Miles NE Dillon SC

Heat Advisory August 20, 11:00am until August 20, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • Today

    Today: Patchy fog between 8am and 9am. Otherwise, sunny, with a high near 96. Heat index values as high as 105. Calm wind becoming south around 6 mph in the afternoon.

    High: 96 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tonight

    Tonight: A slight chance of showers and thunderstorms before midnight, then a slight chance of showers and thunderstorms after 2am. Patchy fog after 5am. Otherwise, partly cloudy, with a low around 75. South wind 5 to 8 mph becoming calm after midnight. Chance of precipitation is 20%.

    Low: 75 °F

    Slight Chance
    T-storms and
    Patchy Fog

  • Friday

    Friday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 5pm. Patchy fog before 9am. High near 95. Heat index values as high as 106. Calm wind becoming south 5 to 7 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 95 °F

    Patchy Fog
    then T-storms

  • Friday Night

    Friday Night: Showers and thunderstorms before 8pm, then showers and possibly a thunderstorm between 8pm and 2am, then a chance of showers and thunderstorms after 2am. Low around 72. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 72 °F

    T-storms then
    Showers

  • Saturday

    Saturday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 90. Calm wind becoming southwest around 6 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 90 °F

    Chance
    Showers then
    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Partly cloudy, with a low around 71. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 71 °F

    Showers
    Likely then
    Chance
    Showers

  • Sunday

    Sunday: Mostly sunny, with a high near 92.

    High: 92 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 70.

    Low: 70 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 91.

    High: 91 °F

    Sunny

Detailed Forecast

Today
Patchy fog between 8am and 9am. Otherwise, sunny, with a high near 96. Heat index values as high as 105. Calm wind becoming south around 6 mph in the afternoon.
Tonight
A slight chance of showers and thunderstorms before midnight, then a slight chance of showers and thunderstorms after 2am. Patchy fog after 5am. Otherwise, partly cloudy, with a low around 75. South wind 5 to 8 mph becoming calm after midnight. Chance of precipitation is 20%.
Friday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 5pm. Patchy fog before 9am. High near 95. Heat index values as high as 106. Calm wind becoming south 5 to 7 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Friday Night
Showers and thunderstorms before 8pm, then showers and possibly a thunderstorm between 8pm and 2am, then a chance of showers and thunderstorms after 2am. Low around 72. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 90. Calm wind becoming southwest around 6 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Partly cloudy, with a low around 71. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
Mostly sunny, with a high near 92.
Sunday Night
Mostly clear, with a low around 70.
Monday
Sunny, with a high near 91.
Monday Night
Mostly clear, with a low around 70.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 91. Chance of precipitation is 40%.
Tuesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 70. Chance of precipitation is 30%.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 91. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NE Dillon SC
 34.46°N 79.32°W (Elev. 121 ft)
Last Update:
3:00 am EDT Aug 20, 2026
Forecast Valid:
4am EDT Aug 20, 2026-6pm EDT Aug 26, 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