May weather forecastFolly Beach, SC
May
Weather in May
In May, Folly Beach experiences a significant increase in temperatures compared to April. Temperatures now range from 69.3°F (20.7°C) to 78.1°F (25.6°C). Predictably, there are no days with snowfall reinforcing Folly Beach's unchanging zero-snow nature. Since May lies in between spring and summer, it can be noticed that daylight hours show maxima in the year. Despite the rise in temperatures, wind speeds in May decrease from April, bringing stillness to the atmosphere.Temperature
Folly Beach's May weather indicates a minor ascent in high-temperatures, adjusting from a pleasant 71.4°F (21.9°C) in April to a moderately hot 78.1°F (25.6°C). Folly Beach, during the nights of May, averages a temperature close to its daytime high, at a pleasant 69.3°F (20.7°C).Humidity
In May, the average relative humidity is 76%.Rainfall
In Folly Beach, in May, during 9.9 rainfall days, 0.47" (12mm) of precipitation is typically accumulated. In Folly Beach, during the entire year, the rain falls for 113.3 days and collects up to 10" (254mm) of precipitation.Snowfall
February through November are months without snowfall.Ocean temperature
In May, the average ocean temperature is 73°F (22.8°C).Note: Factor in your tolerance to cold, the sunshine, the wind, and the air's warmth, and a swim in 73°F (22.8°C) might be tempting. It is interesting to note that Olympians compete in 77°F (25°C) to 82.4°F (28°C) water temperatures.
Daylight
The average length of the day in May is 13h and 51min.On the first day of the month, sunrise is at 6:31 am and sunset at 8:01 pm. On the last day of May, sunrise is at 6:12 am and sunset at 8:22 pm EDT.
Sunshine
In Folly Beach, South Carolina, the average sunshine in May is 10.5h.UV index
The months with the highest UV index are May through August, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index, 7 in May, converts into the following recommendations:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Notice! Sand and water reflections contribute to a stronger UV exposure.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Folly Beach, SC
- Average high temperature in May: 78.1°F
The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (57°F).
- Average low temperature in May: 69.3°F
The months with the highest average low temperature are July and August (78.4°F).
The coldest month (with the lowest average low temperature) is January (46.4°F).
Average pressure in May
Folly Beach, SC
- Average pressure in May: 30.03"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in May
Folly Beach, SC
- Average wind speed in May: 9.8mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is August (8.8mph).
Average humidity in May
Folly Beach, SC
- Average humidity in May: 76%
The month with the highest relative humidity is December (78%).
The months with the lowest relative humidity are January, March and October (73%).
Average rainfall in May
Folly Beach, SC
- Average rainfall in May: 0.47"
The wettest month (with the highest rainfall) is August (1.93").
The driest month (with the least rainfall) is January (0.24").
Average rainfall days in May
Folly Beach, SC
- Average rainfall days in May: 9.9 days
The month with the highest number of rainy days is August (17.3 days).
The month with the least rainy days is November (5.2 days).
Average snowfall days in May
Folly Beach, SC
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (0.2 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October and November (0 days).
Average sea temperature in May
Folly Beach, SC
- Average sea temperature in May: 73°F
The best month for swimming (with the highest average sea temperature) is August (83.5°F).
The coldest month (with the lowest average sea temperature) is February (61.9°F).
Average daylight in May /
Average sunshine in May
Folly Beach, SC
- Average daylight in May: 13h and 48min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in May: 10h and 30min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in May
Folly Beach, SC
- Average sunshine days in May: 18.4 days
The month with the most sunshine days is January (23.9 days).
The month with the least sunshine days is August (8.5 days).
Average UV index in May
Folly Beach, SC
- Average UV index in May: 7
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 3).
Average cloud cover in May
Folly Beach, SC
- Average cloud cover in May: 27
The month with the most cloud cover is December (Cloud cover 39).
The months with the least cloud cover are June and July (Cloud cover 25).
Average visibility in May
Folly Beach, SC
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
