May weather forecast
San Isidro, Philippines

May, the last month of the spring in San Isidro, is another tropical month, with an average temperature ranging between max 33.3°C (91.9°F) and min 24.8°C (76.6°F).

Temperature

May's climate shows a minor adjustment in average high-temperatures to a still tropical 33.3°C (91.9°F) from April's 33.5°C (92.3°F). In the month of May, San Isidro's average low-temperature falls to a warm 24.8°C (76.6°F).

Heat index

For most parts of May, the heat index is computed to be a life-threatening hot 46°C (114.8°F). Stay alert: Heat cramps and heat exhaustion are expected. Heatstroke is a likely outcome of ongoing activity.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to 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.
One of the main methods the human body employs to cool down is by perspiring, as this process allows sweat to evaporate and remove excess heat. With high air temperature and humidity (high heat index) conditions, sweat production is restricted, leading to an amplified perception of heat. Rising body temperatures due to excess heat retention could signify impending heat disorders.

Humidity

In May, the average relative humidity is 74%.

Rainfall

In San Isidro, in May, during 25.2 rainfall days, 195mm (7.68") of precipitation is typically accumulated. Throughout the year, in San Isidro, there are 252.9 rainfall days, and 1795mm (70.67") of precipitation is accumulated.

Daylight

In May, the average length of the day is 12h and 50min.
On the first day of May in San Isidro, sunrise is at 5:32 am and sunset at 6:14 pm. On the last day of the month, sunrise is at 5:24 am and sunset at 6:23 pm PST.

Sunshine

In May, the average sunshine in San Isidro is 10.7h.

UV index

The months with the highest UV index in San Isidro, Philippines, are February through June and August, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for the average person.
Note: In May, the average maximum UV index of 7 translates into the following recommendations:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. UV radiation from the sun is at its strongest between 10 a.m. and 4 p.m. Try to limit direct exposure during these hours. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.