May weather forecast
Puerto Vallarta, Mexico

May experiences a considerable leap in temperatures. With the weather officially transitioning towards summer, Puerto Vallarta enjoys a great rush of tourists. With a hike in temperatures, there is a corresponding surge in humidity to 65% heralding the May climate. Persistent sunshine of about 9.8 hours fills the day, and with a subtle increase in rainfall to 8mm (0.31"), the region flaunts a typical tropical atmosphere. Puerto Vallarta in May imbibes a sublime mixture of warmth, humidity, and occasional showers, making it all the more appealing.

Temperature

May is the month when Puerto Vallarta experiences its warmest temperatures, averaging a high of 30.4°C (86.7°F) and a low of 19.6°C (67.3°F).

Heat index

May's heat index is appraised at a sweltering 35°C (95°F). Implement heightened safety measures - risk of heat exhaustion and heat cramps is increased. Prolonged activity may result in heatstroke.
Consider that heat index readings are for situations in the shade and light wind. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is a metric representing the sensation of warmth when air temperature and moisture come together. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. When relative humidity is heightened, it slows the rate of evaporation, thereby decreasing the body's ability to shed heat and creating a sensation of overheating. As body temperatures escalate without effective heat release, one might face dehydration threats.

Humidity

In May, the average relative humidity is 65%.

Rainfall

In Puerto Vallarta, during May, the rain falls for 4 days and regularly aggregates up to 8mm (0.31") of precipitation. Throughout the year, in Puerto Vallarta, there are 153.3 rainfall days, and 735mm (28.94") of precipitation is accumulated.

Sea temperature

In Puerto Vallarta, in May, the average water temperature is 27.4°C (81.3°F).
Note: Temperatures between 25°C (77°F) and 29°C (84.2°F) in water are ideal for swimming, diving, and other activities, providing enjoyment and comfort for extended durations.

Daylight

In May, the average length of the day is 13h and 8min.
On the first day of the month, sunrise is at 6:30 am and sunset at 7:25 pm. On the last day of May, in Puerto Vallarta, sunrise is at 6:19 am and sunset at 7:37 pm CST.

Sunshine

With an average of 9.8h of sunshine, May has the most sunshine of the year in Puerto Vallarta, Mexico.

UV index

The months with the highest UV index in Puerto Vallarta, Mexico, are January through November, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for average individuals.
Note: A daily high UV index of 6 in May leads to these guidelines:
Implement preventive steps and embrace sun safety standards. Protection from skin and eye distress is compulsory. 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. To cut down UV radiation exposure by about half, sport a wide-brim hat. Take note! Sand and water reflections strengthen the Sun's UV exposure.