December weather forecast
Sibolga, Indonesia

As the last month of the year, December maintains the cool and moist weather of the previous month. The rainfall decreases somewhat to 201mm (7.91"), creating a cooler atmosphere for holiday celebrations. The month brings along the adapter traits seen in the year-end climatic conditions of Sibolga. Season festivities in the city are accompanied by a glistening backdrop of rain-soaked environs. December wraps up the year with cloudy skies and a refreshing chill in the air, setting the stage for the incoming year.

Temperature

The transition into December notes an average high-temperature of a still warm 27.5°C (81.5°F), revealing a mild distinction from the 27.3°C (81.1°F) in November. Throughout the nights in December, an average low-temperature of 22.3°C (72.1°F) is noted.

Heat index

The average heat index in December is calculated to be a tropical 31°C (87.8°F). With prolonged exposure and constant activity, one might feel exhausted and experience heat cramps.
It is crucial to understand that heat index figures are for shade and gentle wind conditions. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', melds the effects of warmth and moisture to generate a feeling of heat. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. Taking into account that direct sunlight can boost the heat effect, the heat index may rise by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.

Humidity

The average relative humidity in December in Sibolga is 83%.

Rainfall

In December, the rain falls for 26.1 days. Throughout December, 201mm (7.91") of precipitation is accumulated. In Sibolga, during the entire year, the rain falls for 285.3 days and collects up to 1792mm (70.55") of precipitation.

Sea temperature

In December, the average sea temperature is 29.3°C (84.7°F).
Note: With water temperature from 25°C (77°F) to 29°C (84.2°F), all water activities are comfortable and delightful, devoid of discomfort even for lengthened periods.

Daylight

December has the shortest days of the year in Sibolga, Indonesia, with an average of 12h and 0min of daylight.
On the first day of December, sunrise is at 06:13 and sunset at 18:14. On the last day of the month, sunrise is at 06:27 and sunset at 18:28 WIB.

Sunshine

In December, the average sunshine in Sibolga is 7.5h.

UV index

The months with the highest UV index are January through December, with an average maximum UV index of 6. January through December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum UV index, 6 during December, leads to the following recommendations:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Notice! The Sun's UV exposure elevates with sand and water reflections.