December weather forecast
Ancol, Indonesia

December, the first month of the summer in Ancol, is still a tropical month, with temperature in the range of an average low of 24.6°C (76.3°F) and an average high of 30.4°C (86.7°F).

Temperature

Ancol records an average high-temperature of a still tropical 30.4°C (86.7°F) in December, closely mirroring the climate of the previous month. Ancol experiences an average temperature drop to a warm 24.6°C (76.3°F) during December nights.

Heat index

December's heat index is calculated to be a torrid 38°C (100.4°F). Undertake additional precautions, heat cramps and heat exhaustion could happen. Heatstroke could occur from sustained activity.
Heat index determinations are made taking into account the shade and light air movements. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is achieved by amalgamating air temperature with the relative humidity readings. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. It is noteworthy that being in direct sunlight can enhance the weather's impact, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance 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.
Evaporation of sweat is the main factor behind the cooling effect of perspiration in the human body. Elevated relative humidity diminishes evaporation, thereby reducing the body's ability to shed heat and creating a feeling of being too warm. 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 Ancol, the average relative humidity in December is 77%.

Rainfall

In Ancol, Indonesia, during December, the rain falls for 27.5 days and regularly aggregates up to 156mm (6.14") of precipitation. In Ancol, during the entire year, the rain falls for 292.5 days and collects up to 1468mm (57.8") of precipitation.

Daylight

With an average of 12h and 30min of daylight, December has the longest days of the year.
On the first day of the month, sunrise is at 05:28 and sunset at 17:55. On the last day of December, in Ancol, Indonesia, sunrise is at 05:41 and sunset at 18:09 WIB.

Sunshine

December has the most sunshine of the year in Ancol, with an average of 9.2h of sunshine.

UV index

February through December, with an average maximum UV index of 7, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the average person.
Note: A daily high UV index of 7 in December leads to these guidelines:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.