December weather forecast
Jatinegara, Indonesia

The first month of the summer, December, is still a tropical month in Jatinegara, Indonesia, with temperature in the range of an average low of 26°C (78.8°F) and an average high of 30.6°C (87.1°F).

Temperature

Jatinegara sees the arrival of December with an average high-temperature of a still tropical 30.6°C (87.1°F), indicating a subtle variation from November. Jatinegara's nighttime average temperature in December drops marginally from the daytime highs, settling at a moderately hot 26°C (78.8°F).

Heat index

For most parts of December, the heat index is computed to be a sweltering 37°C (98.6°F). Heightened safety actions are necessary, heat cramps and heat exhaustion are probable. Persistent activity may lead to heatstroke.
Remember that heat index calculations are made for conditions in the shade with light wind. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', measures the perceived warmth when incorporating the humidity present in the air. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Youngsters often neglect the necessity for rest and hydration. Thirst is a sign of advancing dehydration - thus the importance of maintaining hydration, specifically during long-lasting physical activities.
To combat high temperatures, the human body perspires and relies on sweat evaporation for cooling. In situations of high air temperature combined with high humidity (significant heat index), the body's ability to perspire is reduced, heightening the sense of warmth. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.

Humidity

The average relative humidity in December in Jatinegara, Indonesia, is 71%.

Rainfall

In Jatinegara, Indonesia, in December, it is raining for 23.9 days, with typically 123mm (4.84") of accumulated precipitation. In Jatinegara, during the entire year, the rain falls for 252 days and collects up to 1150mm (45.28") of precipitation.

Daylight

The month with the longest days is December, with an average of 12h and 30min of daylight.
On the first day of the month, sunrise is at 05:27 and sunset at 17:55. On the last day of December, sunrise is at 05:41 and sunset at 18:09 WIB.

Sunshine

In Jatinegara, the average sunshine in December is 9.3h.

UV index

The months with the highest UV index are January through December, with an average maximum UV index of 7. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for the average person.
Note: The maximum daily UV index of 7 during December translates into the following directions:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.