December weather forecast
Arenas, Philippines

December, the first month of the winter in Arenas, is also a moderately hot month, with an average temperature varying between 22.1°C (71.8°F) and 29.9°C (85.8°F).

Temperature

The initiation of December sees an average high-temperature of a moderately hot 29.9°C (85.8°F), showing minor variations from the previous month. In December, Arenas records an average nighttime temperature of 22.1°C (71.8°F).

Heat index

The heat index value for December is appraised at a sweltering 37°C (98.6°F). Adopt additional preventive measures, heat cramps and heat exhaustion are potential outcomes. Prolonged activity may trigger heatstroke.
Given the heat index, its values are aligned with shaded sites and gentle winds. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'feels like' or 'apparent temperature', measures the perceived warmth when incorporating the humidity present in the air. One's perception of temperature is subjective, varying based on their activity and individual heat perception, influenced by factors like wind, clothing, and metabolic variations. When in direct sunlight, one should be cautious as it can raise the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Children frequently do not understand the need for recuperation and hydration. Thirst, being a late manifestation of dehydration, underlines the need to hydrate frequently, especially when engaging in prolonged physical exercises.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

In Arenas, Philippines, the average relative humidity in December is 80%.

Rainfall

In Arenas, during December, the rain falls for 13.1 days and regularly aggregates up to 61mm (2.4") of precipitation. Throughout the year, there are 226.3 rainfall days, and 1398mm (55.04") of precipitation is accumulated.

Daylight

The month with the shortest days in Arenas is December, with an average of 11h and 12min of daylight.
On the first day of the month, sunrise is at 6:07 am and sunset at 5:25 pm. On the last day of December, sunrise is at 6:22 am and sunset at 5:37 pm PST.

Sunshine

In December, the average sunshine is 6.8h.

UV index

The months with the lowest UV index are January, July, November and December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: A daily high UV index of 6 in December leads to these guidelines:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.