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

April's arrival shows an average high-temperature of a still warm 28.5°C (83.3°F), hardly different from the previous month. Nuku'alofa experiences an average temperature drop to a pleasant 22.1°C (71.8°F) during April nights.

Heat index

April's mean heat index is appraised at a hot 33°C (91.4°F). Preventive measures are required to mitigate the risk of heat cramps and heat exhaustion. Continuous activity may precipitate heatstroke.
Heat index readings emphasize conditions of light breezes and shaded spots. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'real feel' or 'apparent temperature', gauges the sensation of temperature factoring in the air's moisture content. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. The sun, when shining directly, can have a significant impact on the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.

Humidity

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

Rainfall

In April, the rain falls for 17 days. Throughout April, 165mm (6.5") of precipitation is accumulated. Throughout the year, there are 180 rainfall days, and 1721mm (67.76") of precipitation is accumulated.

Sea temperature

In Nuku'alofa, the average seawater temperature in April is 27.7°C (81.9°F).
Note: Water temperatures in the range of 25°C (77°F) to 29°C (84.2°F) are warm and delightful, ensuring comfort during water activities over extended periods.

Daylight

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

Sunshine

The average sunshine in April is 13h.

UV index

In Nuku'alofa, the average daily maximum UV index in April is 10. A UV Index estimate of 8 to 10 represents a very high health risk from unsafe exposure to UV radiation for the average person.
Note: The maximum daily UV index of 10 in April converts into the following recommendations:
Be constantly cautious; skin and eyes can be quickly affected if left unprotected. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Broad-spectrum sunscreen with an SPF of 30 or above should be applied generously and reapplied every two hours and right after any outdoor activity or swim. Take warning! Reflective sand and water surfaces intensify the Sun's UV rays.