Myrtle Beach Weather in May
Weather that's mostly sunny and dry along with warm temperatures make May a delightful month at Myrtle Beach in South Carolina.
This page gives detailed information on the typical May 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
| 79 °F | May average high | 26 °C |
| 62 °F | May average low | 17 °C |
| 15 days | 80 °F max. or more (27 °C) |
| 11 days | 60 °F min. or less (16 °C) |
The temperature rises nearly every day in May to over 70 degrees Fahrenheit (21 degrees Celsius) at Myrtle Beach. The city averages one day this month when the thermometer reaches into the 90s °F (over 32 °C). Temperatures above 100 °F (38 °C) are not expected here during May.
The thermometer dips to 50 °F (10 °C) or below on an average of 2 nights. May does not normally get as cold as 40 °F (4 °C).
Rain
| 3.0 in | total precipitation | 75 mm |
| 10 days | of rain |
Half the time, Myrtle Beach receives 1.8 to 4.0 inches (46 to 100 mm) of rainfall in May. One in four years has drier weather, while another one in four is wetter.
Sun
| 68 % | sunshine |
| 8 days | clear skies |
The sun's rays reach the ground in Myrtle Beach during 68 percent of daylight hours on average in May, for a total of 294 hours in the month. Typically on 8 days this month the sky is mainly clear, with at most 30 percent cloud cover.
Sunlight in May at this vacation destination lasts for 13 hours and 55 minutes a day on average. The shortest day of the month is the 1st with 13 hours and 32 minutes of daylight. By the end of the month, the days have lengthened to 14:14 from sunrise to sunset. These durations can vary by a minute or two from year to year.
Humidity
| 73 % | May average humidity |
The relative humidity in Myrtle Beach during May usually peaks at 89 percent in the morning then drops to 53 percent by early afternoon.
| Local Time | 1 am | 4 am | 7 am | 10 am | 1 pm | 4 pm | 7 pm | 10 pm |
| Humidity % | 87 | 89 | 85 | 61 | 53 | 55 | 68 | 82 |
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.