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 sea temperature 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
A minimal variation is noted in Port Isabel's average high-temperature at the onset of May, reaching a still warm 81.9°F (27.7°C) from April's 77.7°F (25.4°C). Port Isabel's evenings during May maintain an average temperature of 75.7°F (24.3°C), aligning closely with the daytime temperatures.Heat index
For most parts of May, the heat index is evaluated at a hot 87.8°F (31°C). Prolonged exposure combined with continuous activity could lead to exhaustion, and possibly heat cramps.Observations indicate that the heat index values are for shady locations with light wind. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', combines both the air temperature and the humidity level to give a perceived human temperature. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. Consider that direct sun exposure can intensify the felt heat, adding potentially 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly important for children. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
Humidity
The most humid month in Port Isabel is May, with an average relative humidity of 80%.Rainfall
In Port Isabel, in May, during 8.4 rainfall days, 1.18" (30mm) of precipitation is typically 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: A water temperature from 77°F (25°C) to 84.2°F (29°C) is considered very warm and enjoyable, allowing water activities to be pleasant for extended periods without irritation.
Daylight
The average length of the day in May is 13h and 26min.On the first day of May in Port Isabel, 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 is 10.7h.UV index
The months with the highest UV index in Port Isabel are April through September, with an average maximum UV index of 7. 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: In May, the average maximum UV index of 7 translates into the following recommendations:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Warning! Reflective surfaces like sand and water amplify the Sun's UV radiation.
Frequently asked questions
What is the temperature in May in Port Isabel?
What is the most humid month in Port Isabel?
What is the average humidity in May in Port Isabel?
How much does it rain in Port Isabel in May?
How warm is the water in May in Port Isabel?
How many hours of daylight does Port Isabel have in May?
When is the sunrise / sunset in May in Port Isabel?
How many hours of sunshine does Port Isabel have in May?
What is the month with the highest UV index in Port Isabel?
How high is the UV index in May in Port Isabel?
Average temperature in May
Port Isabel, TX
- Average high temperature in May: 81.9°F
The warmest month (with the highest average high temperature) is August (88°F).
The month with the lowest average high temperature is January (67.1°F).
- Average low temperature in May: 75.7°F
The month with the highest average low temperature is August (82°F).
The coldest month (with the lowest average low temperature) is January (59.5°F).
Average pressure in May
Port Isabel, TX
- Average pressure in May: 29.88"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The months with the lowest atmospheric pressure are May and June (29.88"Hg).
Average wind speed in May
Port Isabel, TX
- Average wind speed in May: 14mph
The windiest month (with the highest average wind speed) is April (14.2mph).
The calmest month (with the lowest average wind speed) is September (10.9mph).
Average humidity in May
Port Isabel, TX
- Average humidity in May: 80%
The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is October (72%).
Average rainfall in May
Port Isabel, TX
- Average rainfall in May: 1.18"
The wettest month (with the highest rainfall) is September (4.13").
The driest month (with the least rainfall) is April (0.51").
Average rainfall days in May
Port Isabel, TX
- Average rainfall days in May: 8.4 days
The month with the highest number of rainy days is September (19.8 days).
The month with the least rainy days is March (8.2 days).
Average sea temperature in May
Port Isabel, TX
- Average sea temperature in May: 77.8°F
The best month for swimming (with the highest average sea temperature) is August (85.1°F).
The coldest month (with the lowest average sea temperature) is February (66.7°F).
Average daylight in May /
Average sunshine in May
Port Isabel, TX
- Average daylight in May: 13h and 2min
The month with the longest days is June (Average daylight: 13h and 42min).
The month with the shortest days is December (Average daylight: 10h and 30min).
- Average sunshine in May: 10h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 4h and 48min).
Average sunshine days in May
Port Isabel, TX
- Average sunshine days in May: 20.6 days
The month with the most sunshine days is March (20.7 days).
The month with the least sunshine days is September (7.2 days).
Average UV index in May
Port Isabel, TX
- Average UV index in May: 7
The months with the highest UV index are April, May, June, July, August and September (UV index 7).
The months with the lowest UV index are January, February and December (UV index 5).
Average cloud cover in May
Port Isabel, TX
- Average cloud cover in May: 28
The month with the most cloud cover is December (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 20).
Average visibility in May
Port Isabel, TX
- 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).
Port Isabel, Texas, USA
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