December weather forecast
Tainan, Taiwan

December closes out the year in Tainan on a relatively dry note, with the city experiencing the lowest rainfall of the year at 14mm (0.55"). The month is characterized by shorter daylight hours, fewer sunshine hours, and a further decrease in the UV index. Nonetheless, temperatures remain mild, and the relative humidity stays comparable to the rest of the year. Coupled with the significant drop in precipitation, December provides a comfortably cool and dry finish to Tainan's weather for the year.

Temperature

With the arrival of December, Tainan notices a mild change in the average high-temperature, sliding from November's moderately hot 27.7°C (81.9°F) to a still warm 24.1°C (75.4°F). Tainan's average low-temperature is measured at a mild 15.6°C (60.1°F) during December.

Humidity

With an average relative humidity of 75.5%, December is the least humid month in Tainan.

Rainfall

The month with the least rainfall in Tainan is December, when the rain falls for 2.8 days and typically collects 14mm (0.55") of precipitation.

Sea temperature

In Tainan, in December, the average water temperature is 24.8°C (76.6°F).
Note: Swimming in 24.8°C (76.6°F) water can be enjoyable based on one's cold tolerance and conditions like sunshine, wind, and ambient temperature. (Olympic swimmers compete in waters between 25°C (77°F) and 28°C (82.4°F).)

Daylight

December has the shortest days of the year, with an average of 10h and 48min of daylight.
On the first day of the month, sunrise is at 06:23 and sunset at 17:12. On the last day of December, in Tainan, sunrise is at 06:39 and sunset at 17:24 CST.

Sunshine

December has the least sunshine of the year, with an average of 5.6h of sunshine.

UV index

The month with the lowest UV index in Tainan is December, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: During December, 6 as the daily maximum UV index converts into the following advice:
Deflect overexposure. Sun protection is a necessity. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Attention! The combination of sand and water reflections enhances UV ray intensity.