May weather forecastSaint Simons Island, GA
May
Weather in May
May heralds the arrival of summer on Saint Simons Island with noticeable increases in temperature, producing more hot and humid conditions. Compared to April, May offers less rainfall despite warmer temperatures. The daylight extends more, making way for longer excursions, and water lovers enjoy comfortably warm sea temperatures. May's climatic apex is the high average sea temperature of 73.9°F (23.3°C), up by 6.6°F (-14.1°C) from April. The month concludes the spring’s moderate conditions and transitions into the popular and vibrant summer season.Temperature
Observing a slight rise in May, the average high-temperature shifts from April's moderately hot 75°F (23.9°C) to a still warm 81.1°F (27.3°C). During May, Saint Simons Island's temperature falls to a steady low-temperature average of 69.1°F (20.6°C).Heat index
The average heat index in May is calculated to be a hot 86°F (30°C). With unrelenting exposure and activity, one might experience exhaustion, leading to potential heat cramps.The metrics for the heat index are tailored for both shady environments and light winds. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', measures the perceived warmth when incorporating the humidity present in the air. The influence of weather is personal, differing among a variety of individuals based on differences in body mass, stature, and the level of physical activity. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
Humidity
In May, the average relative humidity is 75%.Rainfall
In Saint Simons Island, Georgia, in May, it is raining for 12.6 days, with typically 1.42" (36mm) of accumulated precipitation. Throughout the year, there are 163.3 rainfall days, and 20.43" (519mm) of precipitation is accumulated.Snowfall
January, March through November are months without snowfall.Ocean temperature
In May, the average ocean temperature is 73.9°F (23.3°C).Note: Factoring in a person's dislike for cold, combined with conditions like sunshine, wind, and temperature, a dip in 73.9°F (23.3°C) waters might be satisfying. (It is worth noting that the Olympic swimming waters are maintained between 77°F (25°C) and 82.4°F (28°C).)
Daylight
In May, the average length of the day is 13h and 45min.On the first day of the month, sunrise is at 6:40 am and sunset at 8:05 pm. On the last day of May, sunrise is at 6:22 am and sunset at 8:24 pm EDT.
Sunshine
In Saint Simons Island, the average sunshine in May is 10.6h.UV index
May through September, 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 average individuals.Note: The daily high UV index of 7 during May translates into the following recommendations:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Be on guard! The reflective nature of sand and water boosts UV exposure.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Saint Simons Island, GA
- Average high temperature in May: 81.1°F
The warmest month (with the highest average high temperature) is July (88.7°F).
The month with the lowest average high temperature is January (60.4°F).
- Average low temperature in May: 69.1°F
The month with the highest average low temperature is August (77.4°F).
The coldest month (with the lowest average low temperature) is January (47.7°F).
Average pressure in May
Saint Simons Island, GA
- Average pressure in May: 30.02"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.98"Hg).
Average wind speed in May
Saint Simons Island, GA
- Average wind speed in May: 8.2mph
The windiest months (with the highest average wind speed) are January and April (8.8mph).
The calmest month (with the lowest average wind speed) is August (6.9mph).
Average humidity in May
Saint Simons Island, GA
- Average humidity in May: 75%
The months with the highest relative humidity are August and December (78%).
The month with the lowest relative humidity is March (72%).
Average rainfall in May
Saint Simons Island, GA
- Average rainfall in May: 1.42"
The wettest month (with the highest rainfall) is August (3.43").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in May
Saint Simons Island, GA
- Average rainfall days in May: 12.6 days
The month with the highest number of rainy days is August (23.3 days).
The month with the least rainy days is January (8.2 days).
Average snowfall days in May
Saint Simons Island, GA
- Average snowfall days in May: 0 days
The months with the highest number of snowfall days are February and December (0.1 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October and November (0 days).
Average sea temperature in May
Saint Simons Island, GA
- Average sea temperature in May: 73.9°F
The best month for swimming (with the highest average sea temperature) is August (83.4°F).
The coldest month (with the lowest average sea temperature) is February (58.5°F).
Average daylight in May /
Average sunshine in May
Saint Simons Island, GA
- Average daylight in May: 13h and 42min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in May: 10h and 36min
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 48min).
Average sunshine days in May
Saint Simons Island, GA
- Average sunshine days in May: 16 days
The month with the most sunshine days is March (20.1 days).
The month with the least sunshine days is August (4.2 days).
Average UV index in May
Saint Simons Island, GA
- Average UV index in May: 7
The months with the highest UV index are May, June, July, August and September (UV index 7).
The month with the lowest UV index is January (UV index 3).
Average cloud cover in May
Saint Simons Island, GA
- Average cloud cover in May: 27
The months with the most cloud cover are February and December (Cloud cover 38).
The months with the least cloud cover are April, May, June and July (Cloud cover 27).
Average visibility in May
Saint Simons Island, GA
- 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).
