Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
The average high-temperature mildly increases in May, edging from a pleasant 71.8°F (22.1°C) in April to a moderately hot 78.1°F (25.6°C). During May, the average low-temperature is recorded at an agreeable 68.7°F (20.4°C).Humidity
In Sullivan's Island, the average relative humidity in May is 76%.Rainfall
In May, the rain falls for 15.8 days. Throughout May, 3.23" (82mm) of precipitation is accumulated. Throughout the year, in Sullivan's Island, there are 182 rainfall days, and 45.55" (1157mm) of precipitation is accumulated.Snowfall
In Sullivan's Island, snow does not fall in March through December.Daylight
In Sullivan's Island, the average length of the day in May is 13h and 52min.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, in Sullivan's Island, South Carolina, sunrise is at 6:12 am and sunset at 8:22 pm EDT.
Sunshine
The average sunshine in May in Sullivan's Island 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 reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 7 in May translates into these instructions:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
Frequently asked questions
What is the usual temperature for Sullivan's Island in May?
What is the average humidity in May in Sullivan's Island?
How many days does it rain in May in Sullivan's Island?
When it does not snow in Sullivan's Island?
How many hours of daylight does Sullivan's Island have in May?
When is the sunrise / sunset in May in Sullivan's Island?
How long on average sun shines in May in Sullivan's Island?
What is the month with the highest UV index in Sullivan's Island?
What is the UV index intensity in May in Sullivan's Island?
Average temperature in May
Sullivan's Island, SC
- Average high temperature in May: 78.1°F
The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (57°F).
- Average low temperature in May: 68.7°F
The month with the highest average low temperature is July (78.3°F).
The coldest month (with the lowest average low temperature) is January (45.5°F).
Average pressure in May
Sullivan's Island, 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
Sullivan's Island, SC
- Average wind speed in May: 9.4mph
The windiest months (with the highest average wind speed) are March and April (10.3mph).
The calmest month (with the lowest average wind speed) is August (8.4mph).
Average humidity in May
Sullivan's Island, 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 and March (73%).
Average rainfall in May
Sullivan's Island, SC
- Average rainfall in May: 3.23"
The wettest month (with the highest rainfall) is August (8.23").
The driest month (with the least rainfall) is January (1.42").
Average rainfall days in May
Sullivan's Island, SC
- Average rainfall days in May: 15.8 days
The month with the highest number of rainy days is August (25.9 days).
The month with the least rainy days is November (8.5 days).
Average snowfall days in May
Sullivan's Island, SC
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in May /
Average sunshine in May
Sullivan's Island, SC
- Average daylight in May: 13h and 5min
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 3min
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
Sullivan's Island, SC
- Average sunshine days in May: 12.7 days
The month with the most sunshine days is January (19.3 days).
The month with the least sunshine days is August (2.8 days).
Average UV index in May
Sullivan's Island, 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
Sullivan's Island, SC
- Average cloud cover in May: 27
The month with the most cloud cover is December (Cloud cover 39).
The month with the least cloud cover is June (Cloud cover 25).
Average visibility in May
Sullivan's Island, 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).
Sullivan's Island, South Carolina, USA
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