May weather forecast
South Padre Island, TX

May weather in South Padre Island introduces summer charm, thereby ensuring an uptick in tourist activities. Weather-wise, May portrays a satisfying increase in temperature highs and lows compared to April. Remarkably, the island gets to enjoy the most considerable daylight period of 13.4 hours. The month also exhibits an increase in the number of sunshine days, easing outdoor plans for locals and visitors. A noticeable shift happens in rainfall patterns with 1.18" (30mm) recorded, higher than the preceding months.

Temperature

South Padre Island's average high-temperature in May is a still warm 81.9°F (27.7°C), marking an insignificant difference from the 77.7°F (25.4°C) of April. Throughout May, South Padre Island reports a steady low-temperature average of 75.7°F (24.3°C), slightly lower than its daytime counterpart.

Heat index

Throughout May, the heat index is estimated at a tropical 87.8°F (31°C). If one continues to be active during enduring exposure, it could result in fatigue and heat cramps.
Keep in mind the heat index values are meant for areas in shade and with light wind. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.

Humidity

May is the most humid month in South Padre Island, Texas, with an average relative humidity of 80%.

Rainfall

In May, in South Padre Island, the rain falls for 8.4 days. Throughout May, 1.18" (30mm) of precipitation is accumulated. Throughout the year, there are 143.2 rainfall days, and 21.38" (543mm) of precipitation is accumulated.

Ocean temperature

In May, the average ocean temperature is 77.7°F (25.4°C).
Note: For swimming, diving, and various water activities, the temperatures ranging from 77°F (25°C) to 84.2°F (29°C) are seen as highly enjoyable and comfortable for extended durations without any discomfort.

Daylight

In South Padre Island, the average length of the day in May is 13h and 26min.
On the first day of May, sunrise is at 6:50 am and sunset at 8:00 pm. On the last day of the month, sunrise is at 6:36 am and sunset at 8:16 pm CDT.

Sunshine

In May, the average sunshine in South Padre Island is 10.7h.

UV index

The months with the highest UV index in South Padre Island are April through September, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: In May, the UV index of 7 transforms into the following advice:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.