December weather forecast
Batam, Indonesia

December weather in Batam, Indonesia showcases the city's tropical climate featuring high humidity, warm temperatures, and considerable rainfall. It continues the pattern observed in November, carrying forward high volumes of precipitation. Displaying a peak in rainfall of 220mm (8.66"), December reinforces Batam's climatic depiction as a tropical paradise. The high levels of precipitation coincide with the booming festive season, adding to Batam's allure as a year-round holiday destination. As December concludes, the transition into the next year maintains a similar weather pattern, continuing the cycle of tropical charm that Batam is known for.

Temperature

Batam records an average high-temperature of a moderately hot 29.5°C (85.1°F) in December, closely mirroring the climate of the previous month. In Batam, the December nights are characterized by an average low-temperature of 26°C (78.8°F), a minor dip from daytime readings.

Heat index

In December, the average heat index is computed to be a very hot 36°C (96.8°F). Use additional protective measures, heat cramps and heat exhaustion are possible outcomes. Continuous activity might lead to heatstroke.
Heat index determinations are made taking into account the shade and light air movements. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'felt air temperature' or 'real feel', takes into account both air temperature and humidity to illustrate what people actually feel. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. One should be aware that direct sunshine can amplify the perceived temperature, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Kids frequently ignore the importance of taking a break and rehydrating. Thirst is a late symptom of dehydration - thus, it is crucial to stay hydrated, especially during long-lasting physical activities.
The evaporation of sweat is a natural cooling mechanism of the human body, facilitated by perspiration. With excessive moisture in the atmosphere, the effectiveness of the evaporation process is decreased, causing the body to cool down less efficiently, leading to a sensation of overheating. When the heat gained surpasses the body's cooling capacity, temperatures rise, signaling potential health concerns.

Humidity

January and December, with an average relative humidity of 79%, are the most humid months.

Rainfall

The month with the most rainfall is December, when the rain falls for 26.4 days and typically aggregates up to 220mm (8.66") of precipitation.

Daylight

The month with the shortest days is December, with an average of 12h and 6min of daylight.
On the first day of the month, sunrise is at 05:50 and sunset at 17:54. On the last day of December, sunrise is at 06:05 and sunset at 18:08 WIB.

Sunshine

January and December, with an average of 7.5h of sunshine, are months with the least 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 reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: A maximum high daily UV index of 7 during December translates into the following directions:
Evade overexposure. Individuals with fair skin risk burning in under 20 minutes. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.