May weather forecast
Calamba, Philippines

May, the last month of the spring in Calamba, is also a hot month, with an average temperature ranging between min 25.2°C (77.4°F) and max 32.2°C (90°F).

Temperature

The average temperatures reach their apex in May, averaging 32.2°C (90°F) at the high end and 25.2°C (77.4°F) at the low end.

Heat index

The heat index value during May is calculated to be a blisteringly hot 44°C (111.2°F). Be on the lookout: Heat cramps and heat exhaustion are anticipated. Continued exertion can result in heatstroke.
Be advised, the heat index considers values for conditions in shade and with a light breeze. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. Rising body temperatures resulting from an imbalance in heat absorption can lead to potential thermal issues.

Humidity

The average relative humidity in May in Calamba is 78%.

Rainfall

In May, in Calamba, the rain falls for 21.7 days. Throughout May, 59mm (2.32") of precipitation is accumulated. Throughout the year, there are 216.4 rainfall days, and 476mm (18.74") of precipitation is accumulated.

Daylight

In May, the average length of the day is 12h and 47min.
On the first day of May in Calamba, sunrise is at 5:33 am and sunset at 6:11 pm. On the last day of the month, sunrise is at 5:26 am and sunset at 6:20 pm PST.

Sunshine

The average sunshine in May in Calamba, Philippines, is 11h.

UV index

February through July, September and November, with an average maximum UV index of 7, are months with the highest UV index in Calamba, Philippines. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: The average daily UV index of 7 in May transforms into the following instructions:
Resist overexposure. Safeguarding from solar damage is indispensable. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. Tightly woven clothing, when worn loosely, shields effectively against the Sun.