December weather forecast
Tanna, Vanuatu

December registers a slightly increasing trend in temperatures, signaling the onset of warmer days. The winter rainfall concludes the annual circle by recording 200mm (7.87"), close to the year's average. Sea temperatures are inviting, reaching up to 27°C (80.6°F) just in time for holiday season swims. The longest daylight period of the year ensures enough time for outdoor explorations. Amid all the merriment, the high UV index necessitates consistent use of sunblock.

Temperature

Tanna marks the onset of December with an average high-temperature of a still moderately hot 27°C (80.6°F), a subtle shift from November's 26°C (78.8°F). An average low-temperature of 20°C (68°F) marks the month of December.

Rainfall

In Tanna, in December, during 17 rainfall days, 200mm (7.87") of precipitation is typically accumulated. In Tanna, during the entire year, the rain falls for 213 days and collects up to 2435mm (95.87") of precipitation.

Sea temperature

In December, the average sea temperature is 27°C (80.6°F).
Note: For activities such as swimming and diving, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as particularly pleasant and satisfying for prolonged periods without feeling uneasy.

Daylight

December has the longest days of the year in Tanna, with an average of 13h and 18min of daylight.
On the first day of December in Tanna, sunrise is at 04:54 and sunset at 18:08. On the last day of the month, sunrise is at 05:06 and sunset at 18:24 +11.

Sunshine

The months with the most sunshine in Tanna are January, February, September through December, with an average of 7h of sunshine.

UV index

January through March, October through December, with an average maximum UV index of 12, are months with the highest UV index in Tanna. A UV Index of 11, and more, symbolizes an excessive health risk from exposure to the Sun's UV rays for average individuals.
Note: The maximum UV index, 12 during December, leads to the following recommendations:
Take every essential safety procedure. Individuals with fair skin could sustain burns in less than 5 minutes. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. During bright days, sunglasses that offer UVA and UVB defense are recommended. A sunscreen with at least SPF 30 should be used liberally and reapplied frequently on cloudy days, especially after swimming or an outdoor workout. Take note! Sand and water reflections strengthen the Sun's UV exposure.