May weather forecast
Batangas, Philippines

In May, the Batangas weather begins transitioning from a hot and dry summer to a wet monsoon. Temperatures remain relatively high, but the long, dry days of April gradually make way for overcast skies. A significant surge in rainfall characterizes May, with precipitation almost tripling from April's totals. The sea remains a popular refuge from the increasing humidity. Proceeding to June, expect the weather to retain substantial moisture and an ever-increasing influx of rain.

Temperature

Batangas records the warmest temperatures in May, averaging a high of 31.4°C (88.5°F) and a low of 25.5°C (77.9°F).

Heat index

For most parts of May, the heat index is estimated at a blistering 41°C (105.8°F). Heightened precautions are necessary, heat cramps and heat exhaustion are potential risks. Continuous activity could lead to heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', ties air temperature with relative humidity to produce the perceived temperature sensation. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are particularly meaningful for babies and toddlers. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
The innate cooling system of the human body revolves around perspiration, with the evaporation of sweat being central to this process. An increase in relative humidity hinders the body's normal cooling function by reducing evaporation, thereby decreasing the rate of body cooling and enhancing the sense of warmth. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.

Humidity

In Batangas, the average relative humidity in May is 78%.

Rainfall

In Batangas, in May, it is raining for 19.7 days, with typically 68mm (2.68") of accumulated precipitation. Throughout the year, in Batangas, there are 225.7 rainfall days, and 760mm (29.92") of precipitation is accumulated.

Sea temperature

The months with the warmest seawater are May and June, with an average sea temperature of 29.8°C (85.6°F).
Note: Water temperature ranging between 25°C (77°F) and 29°C (84.2°F) is considered very warm and pleasing for everyone. It allows for enjoyable water activities over extended periods without discomfort.

Daylight

In Batangas, the average length of the day in May is 12h and 46min.
On the first day of the month, sunrise is at 5:33 am and sunset at 6:11 pm. On the last day of May, sunrise is at 5:27 am and sunset at 6:19 pm PST.

Sunshine

In May, the average sunshine in Batangas is 11.2h.

UV index

February through June, August and September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The daily high UV index of 7 in May translates into this advice:
Guard against overexposure. Protection from sun-induced harm is essential. 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. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Be mindful! Sand and water reflections can up the Sun's UV exposure.