December weather forecast
Marilao, Philippines

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

Temperature

The start of December marks an average high-temperature of a warm 29.7°C (85.5°F), hardly distinguishable from the conditions in November. In Marilao, an average temperature of 23.5°C (74.3°F) is noted during December nights.

Heat index

December's mean heat index is calculated to be a sweltering 36°C (96.8°F). Take additional safety steps, risk of heat exhaustion and heat cramps is notable. Prolonged activity may cause heatstroke.
Be advised, the heat index considers values for conditions in shade and with a light breeze. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. Elevated relative humidity diminishes evaporation, thereby reducing the body's ability to shed heat and creating a feeling of being too warm. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.

Humidity

In Marilao, Philippines, the average relative humidity in December is 78%.

Rainfall

In Marilao, Philippines, during December, the rain falls for 14.5 days and regularly aggregates up to 54mm (2.13") of precipitation. In Marilao, 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 December, sunrise is at 6:05 am and sunset at 5:24 pm. On the last day of the month, sunrise is at 6:21 am and sunset at 5:37 pm PST.

Sunshine

In Marilao, the average sunshine in December 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 of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: In December, a daily maximum UV index of 6 leads to the following instructions:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.