December weather forecast
Biak, Indonesia

Coming to the close of the year, December presents an increase in rainfall to 170mm (6.69"), indicating the transition back to wetter months. Alongside, there's a mild decrease in sunshine hours; however, daylight remains consistent with the past months. The typical features of Biak's tropical climate, such as high humidity and stable temperatures, persist through December. Sea temperatures remain uniform, encouraging water-based activities. As December winds down, the trend of increasing rainfall and reduced sunshine indicates a return to the highly rainy months akin to the early part of the year.

Temperature

The commencement of December records an average high-temperature of a warm 29.7°C (85.5°F), barely varying from November's 30°C (86°F). During the nights of December, the average low-temperature in Biak, Indonesia, holds at a still moderately hot 26.2°C (79.2°F).

Heat index

The average heat index in December is calculated to be a fiery hot 36°C (96.8°F). Exercise enhanced safety steps, heat cramps and heat exhaustion are probable. Heatstroke could be a result of sustained activity.
When referencing the heat index, its values are suitable for shady environments and light breezes. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', arises from combining readings of air temperature and relative moisture content. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Children often miss understanding the importance of rest and rehydration. Thirst usually appears late during dehydration - therefore, maintaining hydration, particularly during long physical activities, is essential.
The evaporation of sweat is a natural cooling mechanism of the human body, facilitated by perspiration. Relative humidity in excess curtails evaporation, therefore reducing heat dissipation from the body, leading to feelings of excess heat. When the heat gained surpasses the body's cooling capacity, temperatures rise, signaling potential health concerns.

Humidity

The average relative humidity in December in Biak, Indonesia, is 78%.

Rainfall

In Biak, Indonesia, in December, it is raining for 26.6 days, with typically 170mm (6.69") of accumulated precipitation. In Biak, during the entire year, the rain falls for 323.4 days and collects up to 2132mm (83.94") of precipitation.

Sea temperature

January through October and December, with an average sea temperature of 29°C (84.2°F), are months with the coldest seawater.
Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

December has the longest days of the year in Biak, with an average of 12h and 12min of daylight.
On the first day of the month, sunrise is at 05:39 and sunset at 17:50. On the last day of December, in Biak, sunrise is at 05:53 and sunset at 18:04 WIT.

Sunshine

The average sunshine in December in Biak is 8h.

UV index

February and December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: In December, the maximum UV index of 6 suggests these recommendations:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Heads up! UV intensity is amplified by reflections from water and sand.