December weather forecast
Kupang, Indonesia

December sees Kupang fully embracing its annual monsoon. The showers pick up momentum, and the humidity resurfaces on meter readings, reflecting a complete reversal from the summer spell. After a long wait, the onset of December unlocks the full bounty of the rainy season. It culminates in a substantial increase in rainfall from the November average, registering a notable 140mm. Hence, December's weather completes the yearly cycle by restoring Kupang to its humid and rainy self.

Temperature

The transition from November to December in Kupang sees average high-temperatures adjusting to a warm 29.6°C, from a not significantly different 30.7°C. Kupang observes a consistent average low-temperature of 27.3°C throughout December nights.

Heat index

The heat index value during December is estimated at a very hot 35°C. Adopt heightened preventive measures, heat exhaustion and heat cramps are probable. Persistent activity could lead to heatstroke.
One should be cognizant that the heat index values are tailored for shaded spots and mild winds. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Young ones often ignore the need to take a break and drink fluids. Thirst is a late-stage symptom of dehydration - hence, maintaining hydration, particularly during extended physical activities, is crucial.
Perspiring is how the human body naturally cools down, as sweat's evaporation takes away excess heat. Higher relative humidity impedes evaporation, thus reducing heat dispersion from the body, culminating in a sensation of overheating. If heat absorption isn't effectively countered by the body's cooling methods, body temperature surges, hinting at potential problems.

Humidity

In Kupang, the average relative humidity in December is 75%.

Rainfall

In Kupang, during December, the rain falls for 25 days and regularly aggregates up to 140mm of precipitation. In Kupang, during the entire year, the rain falls for 153.3 days and collects up to 741mm of precipitation.

Sea temperature

With an average sea temperature of 30.6°C, December is the month with the warmest seawater in Kupang.
Note: Swimming's cooling effect can be diminished in waters that have temperatures surpassing 30°C.

Daylight

With an average of 12h and 42min of daylight, December has the longest days of the year.
On the first day of the month, sunrise is at 05:14 and sunset at 17:54. On the last day of December, sunrise is at 05:26 and sunset at 18:09 WITA.

Sunshine

In December, the average sunshine is 9.9h.

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. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for the average person.
Note: In December, the maximum UV index of 7 transforms into these recommendations:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Alert! Sand and water increase UV exposure due to their reflective properties.