April weather forecast
Nuku'alofa, Tonga

April heralds a noticeable transition in the weather, marking the beginning of the moderate season in Nuku'alofa. It presents a noticeable dip in the maximum temperature, which drops to 28.5°C (83.3°F) from 29.6°C (85.3°F) in March. The decrease in rainfall continues, signaling the end of the wetter season. The amount of sunshine continues to decrease, paralleled by a modest decrease in daylight hours. The sea temperature falls slightly, yet remains warm enough for swimming.

Temperature

The weather during April records an average high-temperature of a still moderately hot 28.5°C (83.3°F), closely mirroring the preceding month. Throughout the nights in April, an average low-temperature of 22.1°C (71.8°F) is noted in Nuku'alofa.

Heat index

The heat index value during April is calculated to be a hot 33°C (91.4°F). Implement additional safety measures to avoid heat cramps and heat exhaustion. Persistent activity might trigger heatstroke.
Heat index's context suggests values are appropriate for shady areas and slight breezes. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', provides an understanding of perceived warmth by combining temperature and relative humidity. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Children usually face more risks than adults as their ability to sweat is less. Additionally, their larger skin surface in relation to their petite bodies and higher heat output due to their activities increases their vulnerability.

Humidity

In Nuku'alofa, the average relative humidity in April is 76%.

Rainfall

In Nuku'alofa, during April, the rain falls for 17 days and regularly aggregates up to 165mm (6.5") of precipitation. Throughout the year, in Nuku'alofa, there are 180 rainfall days, and 1721mm (67.76") of precipitation is accumulated.

Sea temperature

In April, the average sea temperature in Nuku'alofa is 27.7°C (81.9°F).
Note: Temperatures between 25°C (77°F) and 29°C (84.2°F) in water are ideal for swimming, diving, and other activities, providing enjoyment and comfort for extended durations.

Daylight

In Nuku'alofa, the average length of the day in April is 11h and 36min.
On the first day of April in Nuku'alofa, Tonga, sunrise is at 06:48 and sunset at 18:40. On the last day of the month, sunrise is at 06:58 and sunset at 18:17 +13.

Sunshine

The average sunshine in April is 13h.

UV index

The average daily maximum UV index in April is 10. A UV Index of 8 to 10 symbolizes a very high health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: In April, the maximum UV index of 10 suggests this advice:
Be vigilant. Without due care, eyes and skin can be harmed in no time. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. After a swim or outdoor exercise, one should liberally reapply broad-spectrum sunscreen with a sun protection factor of 30 or higher. Heads up! The reflection of sand and water notably intensifies UV rays from the Sun.