Myrtle Beach Weather in March
As spring approaches, Myrtle Beach in South Carolina enjoys increasingly comfortable temperatures and sunny skies during March.
This page gives detailed information on the typical March temperature, precipitation, sun and humidity for Myrtle Beach. The temperature and rainfall numbers here are historical averages based on climate data gathered at Grand Strand Airport. The sunshine and humidity measurements are averages from Charleston International Airport.
Temperature
| 65 °F | March average high | 18 °C |
| 45 °F | March average low | 7 °C |
| 23 days | 60 °F max. or more (16 °C) |
| 10 days | 40 °F min. or less (4 °C) |
The temperature rises nearly every day in March to over 50 degrees Fahrenheit (10 degrees Celsius) at Myrtle Beach. The resort city averages 9 days this month when the thermometer reaches into the 70s °F (over 21 °C). Temperatures above 80 °F (27 °C) don't happen every year here during March.
The thermometer dips to below freezing on an average of 3 nights. But March normally doesn't get as cold as 20 °F (-8 °C).
Rain
| 3.6 in | total precipitation | 91 mm |
| 10 days | of rain |
Half the time, Myrtle Beach receives 2.1 to 4.7 inches (53 to 120 mm) of rainfall in March. One in four years has drier weather, while another one in four is wetter.
Sun
| 66 % | sunshine |
| 9 days | clear skies |
The sun's rays reach the ground in Myrtle Beach during 66 percent of daylight hours on average in March, for a total of 246 hours in the month. Typically on 9 days this month the sky is mainly clear, with at most 30 percent cloud cover.
Sunlight in March at the city lasts for 11 hours and 59 minutes a day on average. The shortest day of the month is the 1st with 11 hours and 29 minutes of daylight. By the end of the month, the days have lengthened to 12:31 from sunrise to sunset. These durations can vary by a minute or two from year to year.
Humidity
| 68 % | March average humidity |
The relative humidity in Myrtle Beach during March usually peaks at 83 percent in the morning then drops to 50 percent by early afternoon.
| Local Time | 1 am | 4 am | 7 am | 10 am | 1 pm | 4 pm | 7 pm | 10 pm |
| Humidity % | 80 | 82 | 83 | 61 | 50 | 51 | 64 | 75 |
Reference
The weather data here are long-term averages provided by the US National Centers for Environmental Information (NCEI). Temperature and precipitation are 1991-2020 normals while humidity and thunderstorms are 1961-1990 normals.