May weather forecast
San Isidro, Philippines

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

Temperature

San Isidro ushers in May with an average high-temperature of a still hot 33.3°C (91.9°F), showing a close resemblance to the previous month. San Isidro's temperature tends to fall to an average low of 24.8°C (76.6°F) during the nights of May.

Heat index

The heat index for May is computed to be a burning hot 46°C (114.8°F). Watchful: Heat cramps and heat exhaustion are predicted. Continued exertion could lead to heatstroke.
Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a measure of how hot it feels when the actual air humidity is factored in. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young ones regularly neglect the requirement for rest and fluid replenishment. Thirst is a late stage of dehydration - so, it is necessary to keep hydrated, particularly during extended periods of physical exertion.
Humans rely on perspiration as a cooling mechanism, wherein the evaporating sweat counteracts excessive warmth. When there is an excess of moisture in the atmosphere, the efficiency of the evaporation process is lessened, leading to less efficient body cooling and a sensation of overheating. When the body's heat gain surpasses its removal capacity, body temperature starts to climb, leading to potential heat-related ailments.

Humidity

The average relative humidity in May is 74%.

Rainfall

In May, the rain falls for 25.2 days. Throughout May, 195mm (7.68") of precipitation is accumulated. In San Isidro, during the entire year, the rain falls for 252.9 days and collects up to 1795mm (70.67") of precipitation.

Daylight

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

Sunshine

The average sunshine in May is 10.7h.

UV index

The months with the highest UV index are February through June and August, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for average individuals.
Note: In May, the maximum UV index of 7 suggests this advice:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.