December weather forecast
Penghu, Taiwan

December rounds out the year with the coolest temperatures and least amount of rainfall, providing a crisp contrast to the island's typical climate. December receives the least rain throughout the year with a modest average of 20mm (0.79") over 11 days. The hours of daylight and sunshine decline, signifying the arrival of winter. Despite the decrease in air temperature, the sea remains reasonably warm. As December moves to January, an increment in temperatures along with extended daylight hours can be anticipated.

Temperature

The transition into December in Penghu subtly indicates a reduction in the average high-temperature, down to a pleasant 22°C (71.6°F) from November's warm 26°C (78.8°F). In Penghu, the average low-temperature during the month of December is a refreshing 14°C (57.2°F).

Rainfall

December is the month with the least rainfall. Rain falls for 11 days and accumulates 20mm (0.79") of precipitation.

Sea temperature

In Penghu, in December, the average water temperature is 22°C (71.6°F).
Note: A person's cold intolerance, with sunshine, wind, and air temperature, are essential factors for enjoying swimming in 22°C (71.6°F) water. (FYI: The Olympic swimming competition requires a water temperature between 25°C (77°F) and 28°C (82.4°F).)

Daylight

December has the shortest days of the year in Penghu, with an average of 10h and 42min of daylight.
On the first day of December, sunrise is at 06:27 and sunset at 17:14. On the last day of the month, sunrise is at 06:43 and sunset at 17:26 CST.

Sunshine

The average sunshine in December is 5h.

UV index

The month with the lowest UV index is December, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for average individuals.
Note: The maximum UV index of 6 during December leads to these instructions:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Be careful! The Sun's UV radiation is accentuated by reflecting off sand and water.