December weather forecast
Banjarmasin, Indonesia

Concluding the year, December reinforces the return of monsoon weather for Banjarmasin, Indonesia. Higher rainfall levels accompany humid conditions and lower visibility levels stemming from the high cloud cover percentage. While these characteristics persist from November, the month's temperatures remain fairly stable. The soaring precipitation levels encourage indoor activities while the city embraces the celebratory holiday season. As the rain gauge fills up to 257mm (10.12"), December establishes itself as the month with the heaviest rainfall.

Temperature

The arrival of December brings an average high-temperature of a still tropical 30.9°C (87.6°F), closely following the temperature pattern of November. During the month of December, Banjarmasin experiences a steady low-temperature average of 24.9°C (76.8°F).

Heat index

For December, the heat index is evaluated at an extremely hot 41°C (105.8°F). Undertake extra safety actions, heat cramps and heat exhaustion are expected. Heatstroke may result from lengthy activity.
It is worth noting that heat index values are gauged for conditions in the shade and light breezes. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'real feel' or 'feels like', combines both the air temperature and the humidity level to give a perceived human temperature. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are primarily vital for children. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.
As a reaction to high temperatures, the human body begins to perspire, using the evaporation of sweat to lower its temperature. During high air temperature and humidity (high heat index), the process of perspiration is hindered, intensifying the sensation of heat. Potential thermal conditions emerge as the body's heat gain outpaces its cooling mechanisms.

Humidity

In Banjarmasin, Indonesia, the average relative humidity in December is 81%.

Rainfall

The month with the most rainfall in Banjarmasin is December, when the rain falls for 29.9 days and typically aggregates up to 257mm (10.12") of precipitation.

Sea temperature

March, April, November and December, with an average sea temperature of 29.8°C (85.6°F), are months with the warmest seawater in Banjarmasin.
Note: Ideal surface water temperatures for any water activity fall between 25°C (77°F) and 29°C (84.2°F), offering maximum enjoyment for lengthened periods.

Daylight

With an average of 12h and 18min of daylight, December has the longest days of the year in Banjarmasin.
On the first day of December, sunrise is at 06:01 and sunset at 18:19. On the last day of the month, sunrise is at 06:15 and sunset at 18:34 WITA.

Sunshine

The month with the least sunshine in Banjarmasin, Indonesia, is December, with an average of 7h of sunshine.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In December, an average UV index of 7 transforms into the following instructions:
Take precautions against overexposure. Protection against sun damage is needed. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Take note! The UV strength of the Sun elevates when reflected off water and sand.