December weather forecastSetu, Indonesia

Weather in December

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

Temperature

Setu observes an average high-temperature of a still hot 30.6°C (87.1°F) in December, barely different from 31.5°C (88.7°F) in November. Maintaining close parity with daytime warmth, the average nocturnal temperature in Setu, Indonesia, during December stays at a warm 26°C (78.8°F).

Heat index

The heat index value during December is estimated at a sweltering 37°C (98.6°F). Special measures are necessary to avoid heat cramps and heat exhaustion. Persistent activity could result in heatstroke.
Research indicates the heat index considers values in shaded locales and with light winds. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. 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. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.

Humidity

In December, the average relative humidity is 71%.

Rainfall

In Setu, in December, during 23.9 rainfall days, 123mm (4.84") of precipitation is typically accumulated. Throughout the year, there are 252 rainfall days, and 1150mm (45.28") 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, in Setu, Indonesia, sunrise is at 05:41 and sunset at 18:10 WIB.

Sunshine

In Setu, 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. January through December, with an average maximum UV index of 7, are months with the lowest UV index in Setu. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: The average daily UV index of 7 in December transforms into the following instructions:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.