December weather forecast
Calbiga, Philippines

The first month of the winter, December, is also a moderately hot month in Calbiga, Philippines, with an average temperature varying between 23.4°C (74.1°F) and 28.8°C (83.8°F).

Temperature

The introduction of December notes a subtle temperature variation to a still warm 28.8°C (83.8°F) from November's 29.8°C (85.6°F). In December, Calbiga records an average nighttime temperature of 23.4°C (74.1°F).

Heat index

The heat index for December is computed to be a torrid 35°C (95°F). Exercise heightened safety, heat cramps and heat exhaustion are probable. Persistent activity may provoke heatstroke.
Heat index values are typically calculated for conditions of shade and a light breeze. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'feels like' or 'apparent temperature', combines both the air temperature and the humidity level to give a perceived human temperature. A person's impression of weather can be swayed by numerous aspects, among them metabolic variations, pregnancy, and activity levels. 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 babies and toddlers. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.
For the human body, perspiration is the go-to method to regulate temperature, using sweat's evaporation to dissipate warmth. An increase in relative humidity hinders the body's normal cooling function by reducing evaporation, thereby decreasing the rate of body cooling and enhancing the sense of warmth. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

The average relative humidity in December is 86%.

Rainfall

In Calbiga, during December, the rain falls for 16.2 days and regularly aggregates up to 68mm (2.68") of precipitation. Throughout the year, there are 250 rainfall days, and 834mm (32.83") of precipitation is accumulated.

Daylight

With an average of 11h and 30min of daylight, December has the shortest days of the year.
On the first day of December, sunrise is at 5:43 am and sunset at 5:13 pm. On the last day of the month, sunrise is at 5:59 am and sunset at 5:26 pm PST.

Sunshine

The average sunshine in December is 6.8h.

UV index

The months with the lowest UV index are January, October 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 ordinary individuals.
Note: In December, the maximum UV index of 6 translates into these guidelines:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. Experience reduced UV exposure by about half when donning a wide-brim hat.