December weather forecast
Bulacan, Philippines

The first month of the winter, December, is still a warm month in Bulacan, Philippines, with an average temperature fluctuating between 23.5°C (74.3°F) and 29.7°C (85.5°F).

Temperature

Bulacan measures an average high-temperature of a moderately hot 29.7°C (85.5°F) in December, nearly consistent with the preceding month. December in Bulacan is noted for a mean low-temperature of 23.5°C (74.3°F).

Heat index

In December, the average heat index is appraised at a torrid 36°C (96.8°F). Emphasize additional safety, risk of heat cramps and heat exhaustion is high. Continuous activity might result in heatstroke.
Always consider that heat index estimations are for light winds and places in the shade. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', embodies the combination of air temperature and moisture content to illustrate perceived heat. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. 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 importance for children. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
When the body gets too warm, it perspires, leading to sweat evaporation which cools it down. Heightened relative humidity interferes with the body's usual cooling mechanism by reducing evaporation, subsequently decreasing the body's cooling rate and increasing the sensation of heat. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.

Humidity

The average relative humidity in December is 78%.

Rainfall

In December, in Bulacan, the rain falls for 14.5 days. Throughout December, 54mm (2.13") of precipitation is accumulated. In Bulacan, during the entire year, the rain falls for 245.4 days and collects up to 1578mm (62.13") of precipitation.

Daylight

The month with the shortest days is December, with an average of 11h and 18min of daylight.
On the first day of the month, sunrise is at 6:06 am and sunset at 5:25 pm. On the last day of December, sunrise is at 6:21 am and sunset at 5:37 pm PST.

Sunshine

In December, the average sunshine in Bulacan, Philippines, is 6.6h.

UV index

January, July and December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: In December, the maximum UV index of 6 suggests these recommendations:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.