May weather forecastKiawah Island, SC
May
Weather in May
May brings summer weather to Kiawah Island with an increase in temperature from previous months. The amount of rainfall decreases from April. The wind lessens a little bit, enhancing the warmth of the climate. In typical summer fashion, the day length reaches a high, providing abundant sunlight. May month is a perfect time for beach activities and alfresco dining.Temperature
The shift from April to May introduces a subtle increase in the average high-temperature, moving from a pleasant 71.4°F (21.9°C) to a moderately hot 78.1°F (25.6°C). During the nights of May, Kiawah Island maintains an almost steady temperature with an average low of 69.3°F (20.7°C).Humidity
The average relative humidity in May is 76%.Rainfall
In Kiawah Island, during May, the rain falls for 9.9 days and regularly aggregates up to 0.47" (12mm) of precipitation. In Kiawah Island, during the entire year, the rain falls for 113.3 days and collects up to 10" (254mm) of precipitation.Snowfall
In Kiawah Island, snow does not fall in February through November.Daylight
In Kiawah Island, the average length of the day in May is 13h and 51min.On the first day of May, sunrise is at 6:32 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 6:13 am and sunset at 8:22 pm EDT.
Sunshine
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 reading of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for average individuals.Note: During May, 7 as the daily maximum UV index converts into the following advice:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Kiawah Island, 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
Kiawah 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
Kiawah Island, 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
Kiawah 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, March and October (73%).
Average rainfall in May
Kiawah Island, 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
Kiawah Island, 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
Kiawah Island, 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 daylight in May /
Average sunshine in May
Kiawah Island, 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
Kiawah Island, 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
Kiawah 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
Kiawah Island, 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
Kiawah 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).
