May weather forecast
San Guillermo, Philippines

May, the last month of the spring in San Guillermo, is another tropical month, with an average temperature fluctuating between 22.7°C (72.9°F) and 31.9°C (89.4°F).

Temperature

The introduction of May notes a subtle temperature variation to a still hot 31.9°C (89.4°F) from April's 30.8°C (87.4°F). During the month of May, the temperature in San Guillermo falls to an average of 22.7°C (72.9°F).

Heat index

The heat index in May is appraised at a scorching 43°C (109.4°F). Take caution: Heat exhaustion and heat cramps are probable. Heatstroke may be imminent with ongoing effort.
Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a composite of temperature and humidity figures to convey how warm it feels. Factors encompassing physical activity, clothing, and metabolic differences have a role in shaping the individual's impression of temperature. Consider that direct sun exposure can intensify the felt heat, adding potentially 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are highly important for children. Young ones generally face higher dangers than adults since they sweat less. Along with their large skin surface area compared totheir small bodies and increased heat production from their activities, the risks are heightened.
The body's natural response to excessive warmth is perspiration, as it allows for cooling through sweat evaporation. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.

Humidity

May and June, with an average relative humidity of 78%, are the least humid months.

Rainfall

In San Guillermo, during May, the rain falls for 21.1 days and regularly aggregates up to 89mm (3.5") of precipitation. In San Guillermo, during the entire year, the rain falls for 222.7 days and collects up to 872mm (34.33") of precipitation.

Daylight

The average length of the day in May in San Guillermo is 12h and 55min.
On the first day of May, sunrise is at 5:26 am and sunset at 6:11 pm. On the last day of the month, sunrise is at 5:18 am and sunset at 6:21 pm PST.

Sunshine

The average sunshine in May in San Guillermo is 10.9h.

UV index

The months with the highest UV index in San Guillermo are April through September, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for average individuals.
Note: In May, the maximum UV index of 7 transforms into these recommendations:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.