December weather forecast
Cibadung, Indonesia

The first month of the summer, December, is still a tropical month in Cibadung, Indonesia, with an average temperature varying between 24.9°C (76.8°F) and 30.5°C (86.9°F).

Temperature

December's onset records an average high-temperature of a still hot 30.5°C (86.9°F), a near match to November's 31.4°C (88.5°F). Throughout December, the average low-temperature records at a warm 24.9°C (76.8°F).

Heat index

For December, the heat index is calculated to be a torrid 37°C (98.6°F). Take additional safety steps, risk of heat exhaustion and heat cramps is notable. Prolonged activity may cause heatstroke.
Heat index's context suggests values are appropriate for shady areas and slight breezes. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.
Perspiring is how the human body naturally cools down, as sweat's evaporation takes away excess heat. An increase in relative humidity hinders the body's normal cooling function by reducing evaporation, thereby decreasing the rate of body cooling and enhancing the sense of warmth. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

In Cibadung, the average relative humidity in December is 73%.

Rainfall

In Cibadung, in December, during 27.2 rainfall days, 166mm (6.54") of precipitation is typically accumulated. Throughout the year, there are 288.9 rainfall days, and 1568mm (61.73") of precipitation is accumulated.

Daylight

December has the longest days of the year, with an average of 12h and 30min of daylight.
On the first day of the month, sunrise is at 05:28 and sunset at 17:56. On the last day of December, sunrise is at 05:41 and sunset at 18:11 WIB.

Sunshine

The average sunshine in December is 9h.

UV index

The months with the highest UV index are February through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: In December, the maximum UV index of 7 translates into these guidelines:
Exercise precautions and adapt sun safety practices. Defence against skin and eye affliction is paramount. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.