May weather forecast
Biñan, Philippines

Surprisingly, despite May’s high temperatures barely budging from the April peak, the rainfall witnesses an enormous surge, hitting a high of 79mm (3.11") over 18 days. Coupled with a climb in relative humidity, Biñan encounters a wet yet warm setting. This swift climate transition introduces a lingering overcast environment, with cloud coverage increasing significantly. The latter part of May is characterized by the city’s transition towards monsoon.

Temperature

Biñan in May witnesses an average high-temperature of a still hot 32.5°C (90.5°F), indicating a slight variation from April's 32.6°C (90.7°F). Throughout May nights, Biñan experiences a consistent temperature average of 25.4°C (77.7°F).

Heat index

May's mean heat index is estimated at a scorching 44°C (111.2°F). Beware: Heat exhaustion along with heat cramps are on the cards. Heatstroke could result from sustained physical activity.
When assessing, remember that heat index measurements are for light winds and shaded spots. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is the result of factoring in humidity to the air temperature, indicating perceived warmth. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
The process of perspiration is vital for the human body to get rid of excess warmth by allowing sweat to evaporate. Higher relative humidity impedes evaporation, thus reducing heat dispersion from the body, culminating in a sensation of overheating. When body temperature rises due to excess heat gain beyond its removal capability, one might experience heat-related disorders.

Humidity

In May, the average relative humidity in Biñan is 76%.

Rainfall

In Biñan, Philippines, during May, the rain falls for 18 days and regularly aggregates up to 79mm (3.11") of precipitation. In Biñan, during the entire year, the rain falls for 206.9 days and collects up to 944mm (37.17") of precipitation.

Daylight

The average length of the day in May in Biñan is 12h and 47min.
On the first day of the month, sunrise is at 5:33 am and sunset at 6:12 pm. On the last day of May, in Biñan, Philippines, sunrise is at 5:26 am and sunset at 6:20 pm PST.

Sunshine

The average sunshine in May is 10.9h.

UV index

February through June, August through November, with an average maximum UV index of 7, are months with the highest UV index in Biñan. A UV Index reading of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for average individuals.
Note: The UV index of 7 during May leads to these advisories:
Inhibit overexposure. Warding off sun damage is of utmost importance. 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. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.