December weather forecast
San Ildefonso, Philippines

The first month of the winter, December, is also a moderately hot month in San Ildefonso, Philippines, with an average temperature varying between 29.8°C (85.6°F) and 22.1°C (71.8°F).

Temperature

The average high-temperature in December, at a moderately hot 29.8°C (85.6°F), reveals a modest deviation from November's 30.8°C (87.4°F). The nights of December anticipate an average low-temperature of 22.1°C (71.8°F).

Heat index

The heat index value for December is evaluated at a torrid 37°C (98.6°F). Take more safety measures, heat exhaustion and heat cramps are potential outcomes. Persistent activity might lead to heatstroke.
Research indicates the heat index considers values in shaded locales and with light winds. 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 'feels like', is an aggregate value of air's warmth and moisture to show the human-felt temperature. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. Awareness of direct sun exposure is crucial as it has the potential to heighten the weather's effects, pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
The innate cooling system of the human body revolves around perspiration, with the evaporation of sweat being central to this process. When there is an excess of moisture in the atmosphere, the efficiency of the evaporation process is lessened, leading to less efficient body cooling and a sensation of overheating. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.

Humidity

The average relative humidity in December is 80%.

Rainfall

In San Ildefonso, in December, during 12 rainfall days, 50mm (1.97") of precipitation is typically accumulated. In San Ildefonso, during the entire year, the rain falls for 216.9 days and collects up to 1364mm (53.7") of precipitation.

Daylight

With an average of 11h and 18min of daylight, December has the shortest days of the year in San Ildefonso.
On the first day of December in San Ildefonso, 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 5:36 pm PST.

Sunshine

In December, the average sunshine in San Ildefonso, Philippines, is 6.8h.

UV index

The months with the lowest UV index are January, July and December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for the average person.
Note: The daily high UV index of 6 during December translates into the following recommendations:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Boost your sun resistance with garments that are densely woven yet spacious.