April weather forecast
Koloa, Tonga

As April sails in, Koloa's wet season was firmly behind it. A marginal drop in rainfall from March's levels sustains April's weather pattern. However, cooler air from the south-east can lead to somewhat lower daytime temperatures. This month is characterised by subtly lengthening daylight hours and gentle breezes from the east. The fall in pressure coupled with the rise in sunshine suggests a pleasant and frost-free atmosphere, offering outdoor enthusiasts ample opportunity to explore the city.

Temperature

The arrival of April brings an average high-temperature of a still warm 27.4°C (81.3°F), subtly diverging from March's 28°C (82.4°F). The April nights show a slight decrease to a mean low-temperature of 26.5°C (79.7°F).

Heat index

For most parts of April, the heat index is calculated to be a hot 30°C (86°F). Enduring exposure and unrelenting activity might cause a state of weariness, potentially leading to heat cramps.
Records show heat index calculations are tailored for shaded regions and mild winds. Direct sunlight exposure may result in a rise of the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is the result of factoring in humidity to the air temperature, indicating perceived warmth. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.

Humidity

With an average relative humidity of 77%, April is the least humid month.

Rainfall

In Koloa, during April, the rain falls for 19.7 days and regularly aggregates up to 128mm (5.04") of precipitation. Throughout the year, in Koloa, there are 227.2 rainfall days, and 1333mm (52.48") of precipitation is accumulated.

Daylight

In Koloa, Tonga, the average length of the day in April is 11h and 40min.
On the first day of April in Koloa, Tonga, sunrise is at 06:42 and sunset at 18:36. On the last day of the month, sunrise is at 06:50 and sunset at 18:15 +13.

Sunshine

In April, the average sunshine is 7.3h.

UV index

January through April and December, with an average maximum UV index of 7, are months with the highest UV index in Koloa. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily high UV index of 7 during April translates into the following recommendations:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.