November comes with a definitive return to the warmer, more humid conditions in
Nuku'alofa. The temperature reflects this change with a significant leap to 27.6°C (81.7°F). It simultaneously welcomes the rainier season, receiving a substantial amount compared to the preceding month. Daylight and sunshine hours start to shrink slightly, yet remain extensive for enjoyable outdoor time. The rising sea temperatures aid in providing a soothing warmth for swimmers and divers alike.
Temperature
As November takes hold, the average high-temperature is a still moderately hot 27.6°C (81.7°F), nearly mirroring that of the previous month. Nuku'alofa observes an average low-temperature of 21.1°C (70°F) during November nights.
Heat index
The average heat index in November is appraised at a tropical 30°C (86°F). Ongoing exposure and activity could lead to a state of exhaustion, with a chance of heat cramps.
Understanding the heat index involves considering values for shaded locales with light wind. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', measures the perceived warmth when incorporating the humidity present in the air. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.
Humidity
November is the least humid month, with an average relative humidity of 73%.
Rainfall
In November, the rain falls for 12 days. Throughout November, 123mm (4.84") of precipitation is accumulated. In Nuku'alofa,
Tonga, during the entire year, the rain falls for 180 days and collects up to 1721mm (67.76") of precipitation.
Sea temperature
In November, the average sea temperature is 25.4°C (77.7°F).
Note: Swimming, diving, and other water-related activities in temperatures between 25°C (77°F) and 29°C (84.2°F) are considered highly enjoyable and satisfying for longer durations without uneasiness.
Daylight
The average length of the day in November is 13h and 8min.
On the first day of the month, sunrise is at 05:57 and sunset at 18:51. On the last day of November, sunrise is at 05:50 and sunset at 19:09 +13.
Sunshine
The average sunshine in November is 6h.
UV index
January through
March, November and
December, with an average maximum UV index of 12, are months with the highest UV index. A UV Index reading of 11, and higher, represents an extreme threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: A maximum UV index of 12 in November translates into the following recommendations:
Employ all critical precautions. Guarding against sun damage is essential. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Experience reduced UV exposure by about half when donning a wide-brim hat. Regardless of cloud cover, it's recommended to apply generously and reapply often a sunscreen with an SPF of at least 30, especially after swimming or any outdoor activity. Notice! Sand and water reflections contribute to a stronger UV exposure.