May weather forecast
Subic, Philippines

The last month of the spring, May, is another hot month in Subic, Philippines, with an average temperature varying between 31.4°C (88.5°F) and 26.4°C (79.5°F).

Temperature

May is Subic's warmest month, registering average high temperatures of 31.4°C (88.5°F) and lows of 26.4°C (79.5°F).

Heat index

For most parts of May, the heat index is computed to be a blisteringly hot 40°C (104°F). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.
The metrics for the heat index are tailored for both shady environments and light winds. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a metric representing the sensation of warmth when air temperature and moisture come together. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are especially crucial for babies and toddlers. Young ones often underestimate the need for rest and rehydration. Thirst appears late in dehydration - hence, it is important to keep hydrated, particularly during prolonged physical activities.
Perspiration, followed by sweat evaporation, is the human body's chief method to maintain a balanced temperature. In high relative humidity, the body's ability to evaporate heat is diminished, resulting in a heightened feeling of warmth. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.

Humidity

The average relative humidity in May is 75%.

Rainfall

In May, in Subic, the rain falls for 25.1 days. Throughout May, 119mm (4.69") of precipitation is accumulated. In Subic, Philippines, during the entire year, the rain falls for 237.5 days and collects up to 1892mm (74.49") of precipitation.

Sea temperature

May is the month with the warmest seawater, with an average sea temperature of 29.9°C (85.8°F).
Note: For swimming, diving, and similar activities, the water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered delightful, allowing for extended periods of enjoyment without discomfort.

Daylight

In Subic, the average length of the day in May is 12h and 49min.
On the first day of May in Subic, sunrise is at 5:35 am and sunset at 6:16 pm. On the last day of the month, sunrise is at 5:28 am and sunset at 6:25 pm PST.

Sunshine

In May, the average sunshine is 11.1h.

UV index

February through December, with an average maximum UV index of 7, are months with the highest UV index in Subic. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: In May, a daily UV index of 7 turns into the following recommendations:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Be on guard! The reflective nature of sand and water boosts UV exposure.