December weather forecast
Nuku'alofa, Tonga

December in Nuku'alofa exhibits the climax of sun, heat, and wet conditions. The month’s temperature spirals to a high of 28.7°C (83.7°F). It outpours the maximum amount of rainfall, with 175mm (6.89") accounting for the month's precipitation. Although the day's length is at its pinnacle, sunshine hours witness a substantial rise. The sea warms up to be at its annual highest, making watersports like snorkeling and diving an irresistible affair.

Temperature

Nuku'alofa greets December with an average high-temperature of a still warm 28.7°C (83.7°F), marking a slight deviation from the preceding month. During the month of December, Nuku'alofa anticipates a mean low-temperature of 22.5°C (72.5°F).

Heat index

For most parts of December, the heat index is calculated to be a hot 33°C (91.4°F). Implement more preventive measures, heat cramps and heat exhaustion are probable. Heatstroke might result from extended activity.
Thinking about the heat index, one should account for its values in shaded areas with gentle breezes. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.

Humidity

In December, the average relative humidity is 75%.

Rainfall

In Nuku'alofa, in December, it is raining for 15 days, with typically 175mm (6.89") of accumulated precipitation. In Nuku'alofa, during the entire year, the rain falls for 180 days and collects up to 1721mm (67.76") of precipitation.

Sea temperature

In December, the average sea temperature is 26.6°C (79.9°F).
Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

With an average of 13h and 24min of daylight, December has the longest days of the year in Nuku'alofa.
On the first day of the month, sunrise is at 05:50 and sunset at 19:10. On the last day of December, sunrise is at 06:02 and sunset at 19:26 +13.

Sunshine

In Nuku'alofa, the average sunshine in December is 12h.

UV index

The months with the highest UV index are January through March, November and December, with an average maximum UV index of 12. A UV Index estimate of 11, and higher, represents an extreme threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: The UV index of 12 during December leads to these advisories:
Take all critical precautions, unprotected skin might burn swiftly. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Broad-spectrum sunscreen with an SPF of 30 or more should be applied liberally every two hours and directly after outdoor activities or swimming. Alert! Sand and water increase UV exposure due to their reflective properties.