May weather forecast
San Rafael, Philippines

May, the last month of the spring in San Rafael, is another hot month, with an average temperature varying between 33.3°C (91.9°F) and 26.6°C (79.9°F).

Temperature

San Rafael's temperatures peak on average in May, reaching 33.3°C (91.9°F) at their highest and 26.6°C (79.9°F) at their lowest.

Heat index

The heat index value for May is estimated at a blazing hot 45°C (113°F). Careful: Heat exhaustion and heat cramps are anticipated. With ongoing exertion, heatstroke becomes a possibility.
Research indicates the heat index considers values in shaded locales and with light winds. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', binds temperature metrics with humidity values to give a sense of the actual warmth. A person's impression of weather can be affected by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.
The natural cooling mechanism in humans involves perspiration, where the evaporation of sweat balances out excessive warmth. In circumstances of high air temperature and humidity (high heat index), the body's perspiration is restricted, heightening the feeling of warmth. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

In San Rafael, the average relative humidity in May is 72%.

Rainfall

In San Rafael, Philippines, in May, during 21.4 rainfall days, 92mm (3.62") of precipitation is typically accumulated. Throughout the year, in San Rafael, Philippines, there are 210.3 rainfall days, and 1382mm (54.41") of precipitation is accumulated.

Daylight

In May, the average length of the day in San Rafael is 12h and 50min.
On the first day of the month, sunrise is at 5:32 am and sunset at 6:13 pm. On the last day of May, in San Rafael, sunrise is at 5:25 am and sunset at 6:22 pm PST.

Sunshine

In San Rafael, the average sunshine in May is 11.1h.

UV index

The months with the highest UV index in San Rafael are January through December, with an average maximum UV index of 7. January through December, with an average maximum UV index of 7, are months with the lowest UV index in San Rafael. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum daily UV index of 7 in May interprets into the following recommendations:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.