May weather forecastMount Pleasant, SC
May
Weather in May
May brings a surge in warmth heralding the onset of early summer in Mount Pleasant. Underpinning this shift, high temperatures escalate to a significant 79°F (26.1°C) on average, with daylight hours peaking at 13.9. Coupled with longer day span and rising temperature, this month offers ample opportunities for outdoor activities and picnics. The increase in temperature is matched by the enhanced humidity and regular rain showers, keeping the city’s landscape fresh. The sun salutes the city's late spring by shining brightly for more hours every day.Temperature
May in Mount Pleasant, South Carolina, comes with a subtle rise, with the average high-temperature adjusting from a pleasant 72.1°F (22.3°C) in April to a moderately hot 79°F (26.1°C). During May in Mount Pleasant, the average low-temperature is recorded at a pleasant 68.5°F (20.3°C).Humidity
In Mount Pleasant, the average relative humidity in May is 76%.Rainfall
In Mount Pleasant, during May, the rain falls for 16.5 days and regularly aggregates up to 3.23" (82mm) of precipitation. Throughout the year, in Mount Pleasant, South Carolina, there are 182.9 rainfall days, and 44.69" (1135mm) of precipitation is accumulated.Snowfall
March through November are months without snowfall in Mount Pleasant, South Carolina.Daylight
In Mount Pleasant, South Carolina, 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 Mount Pleasant, sunrise is at 6:12 am and sunset at 8:22 pm EDT.
Sunshine
In Mount Pleasant, South Carolina, the average sunshine in May is 10.4h.UV index
May through August, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the ordinary person.Note: The maximum UV index of 7 during May leads to these instructions:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Mount Pleasant, SC
- Average high temperature in May: 79°F
The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is January (57.2°F).
- Average low temperature in May: 68.5°F
The month with the highest average low temperature is July (77.9°F).
The coldest month (with the lowest average low temperature) is January (45.1°F).
Average pressure in May
Mount Pleasant, 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
Mount Pleasant, SC
- Average wind speed in May: 8.9mph
The windiest month (with the highest average wind speed) is April (9.8mph).
The calmest month (with the lowest average wind speed) is August (7.8mph).
Average humidity in May
Mount Pleasant, 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
Mount Pleasant, SC
- Average rainfall in May: 3.23"
The wettest month (with the highest rainfall) is August (8.03").
The driest month (with the least rainfall) is January (1.38").
Average rainfall days in May
Mount Pleasant, SC
- Average rainfall days in May: 16.5 days
The month with the highest number of rainy days is August (25.8 days).
The month with the least rainy days is November (8.6 days).
Average snowfall in May
Mount Pleasant, SC
- Average snowfall in May: 0"
The month with the highest snowfall is December (0.3").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in May
Mount Pleasant, 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
Mount Pleasant, SC
- Average daylight in May: 13h and 54min
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 24min
The months with the most sunshine are June and July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in May
Mount Pleasant, SC
- Average sunshine days in May: 12.3 days
The months with the most sunshine days are January and November (19.3 days).
The month with the least sunshine days is August (3 days).
Average UV index in May
Mount Pleasant, 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
Mount Pleasant, 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 26).
Average visibility in May
Mount Pleasant, 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).
