The climate of Wailuku
Wailuku,
Hawaii sits within a climatic zone known as As, according to the Köppen climate classification. This is a tropical wet and dry climate, often referred to as a savanna climate. Positioned within the tropics, Wailuku experiences warm temperatures all year round and relative humidity consistently around 75%. It is characterized by a distinct wet and dry seasonality, without any cold winter.
Analyzing the climate data for Wailuku, it reveals that the tropical location results in small temperature fluctuations throughout the year. Peak temperature in the warmest month reaches 79.9°F (26.6°C), whilst in cooler months it usually stays above 70.7°F (21.5°C). Isn't that a paradise-like climate for most of us from colder parts of the world?
Rainfall varies from a low of 0.2" (5mm) during peak summer up to 0.87" (22mm) in the cooler months, with more rainfall days registered from
March to
May and again in
December. The dry season is typically from
June through to
September with almost half the amount of rainfall compared to the wet season.
UV index is constant at 6 from
November through
April, while reaching a peak at 7 from May to
October. Wind speed generally sits between 10.4mph (16.7km/h) and 13.6mph (21.9km/h). Highest recorded monthly average for wind gusts is 18.6mph (29.9km/h) from June to
August.
The best time to visit Wailuku
It's always pleasant in
Wailuku, but if prefered outdoor activity is dependent on the sunniest days, the best time to visit would be from
May to
September. These months offer up to 11 hours of sunshine and the least rainfall throughout the year. UV index does reach 7 during these months, so take necessary sun precautions.
The worst time to visit Wailuku
However, if looking to avoid heavy rainfall, it's advisable to steer clear of
March and
December as these months register the highest rainfall and number of rainfall days. Even then, the amount of rainfall is less than an inch so it's hardly torrential, and temperatures remain between 70.7°F (21.5°C) to 77.7°F (25.4°C).
Spring weather in Wailuku
Spring in
Wailuku runs from
March to
May. March sees the highest amount of rainfall for these months at 0.87" (22mm), though it tapers off dramatically to 0.43" (11mm) by May. The UV index begins to increase from 6 to 7 in this period. Daylight hours steadily increase from 12 hours in March to 13.3 hours in May.
Summer weather in Wailuku
The summer months, from
June to
August, provide the most sunshine, peaking at 11.5 hours in June and
July. It also consistently records the least rainfall, 0.2" (5mm) in June increasing slightly to 0.39" (10mm) in August.
Wailuku's high tropical temperatures see little variation, and during summer months it remains between 77°F (25°C) to 79.5°F (26.4°C).
Autumn weather in Wailuku
Autumn in
Wailuku, running from
September to
November, sees a decline in sunshine from 9.6 hours in September to 7.2 hours in November. Rainfall starts to increase in this period from 0.39" (10mm) in September to 0.51" (13mm) in November. However, the number of rainfall days is still relatively low, making it a comfortable time to engage in outdoor activities.
Winter weather in Wailuku
Winter in
Wailuku is from
December to
February. This phase acknowledges the highest rainfall 0.87" (22mm) in December, which then lessens to 0.55" (14mm) by February. Daylight hours are at their lowest for the year, roundabout 11 hours, while UV index remains constant at 6. Even in these cooler months, temperatures range from 70.7°F (21.5°C) to 73.9°F (23.3°C), making this a mild winter experience.
Weather in January
January in
Wailuku,
Hawaii, brings mild temperatures and slightly increased rainfall. High temperatures hover around 74.7°F (23.7°C), while low temperatures dip to approximately 71.6°F (22°C). Traditionally, the beginning of the year carries with it slightly increased rainfall, reaching 0.55" (14mm) over an average of 8.8 days.
Weather in January » Weather in February
February brings a slight decrease in temperature, but the weather pattern remains largely consistent with
January. Noteworthy is the increased rainfall, registering 0.75" (19mm) over an average of 8.5 days. Despite this increase,
Wailuku remains pleasant due to consistent daylight hours and humidity levels.
Weather in February » Weather in March
During
March,
Wailuku experiences an incrementally warmer climate with a consistent rainfall pattern. Although the temperature slightly increases, the highest rainfall for the year happens this month--that's 0.87" (22mm) after falling over an average of 11.9 days.
Weather in March »
Weather in April
April in
Wailuku brings a reduction in rainfall, contributing to a warm and relatively dry month. The average rainfall notably decreases, measuring just 0.63" (16mm) over roughly 8.1 days, providing an opportunity to enjoy outdoor activities.
Weather in April » Weather in May
May experiences a mild rise in temperature and reduction in rainfall, making it an appealing month for outdoor pursuits. The trend of falling rainfall continues, registering at 0.43" (11mm) spread over an average of 8.3 days. Increased sunshine hours and pleasant weather conditions make this month great for outdoor activities.
Weather in May » Weather in June
June is characterized by consistently warm temperatures and minimal rainfall, making it an ideal month for tourists. In this month, the rainfall reaches its lowest yearly level at just 0.2" (5mm) over the course of roughly 6.6 days.
Weather in June »
Weather in July
July brings about the year's warmest temperatures and a slight increase in rainfall compared to the previous month. Although rainfall increases marginally to 0.39" (10mm) across roughly 8.5 days, it hardly has an impact on the overall weather.
Weather in July » Weather in August
August is marked by warm temperatures consistent with
July, while rainfall shows only a slight increase. The rainfall recorded measures around 0.43" (11mm) over approximately 8.7 days. This month provides ample sunshine hours and a comfortable level of humidity.
Weather in August » Weather in September
In
September,
Wailuku experiences similar weather to
August, with a small decrease in temperatures and steady rainfall. The month's noteworthy pattern is the slight decrease in rainfall to 0.39" (10mm) over an average of 8.1 days.
Weather in September »
Weather in October
October in
Wailuku brings another month of consistent temperatures and a slight rise in the rainfall gauge. This month sees an increase in the rainfall by about 0.55" (14mm), dispersed across an average of 9 days. Though the weather remains predominantly dry, October marks the official arrival of the wet season.
Weather in October » Weather in November
November brings a smaller drop in warm temperatures and slightly increased rainfall in comparison with
October. Rainfall remains relatively consistent with a recorded increase at 0.51" (13mm) over about 7.7 days. As
Wailuku transitions to cooler months, it provides a pleasant atmosphere for visitors seeking outdoor activities amid the natural surroundings. Wailuku's shift into November is marked by a subtle change to a still warm 77.7°F (25.4°C) from October's 79.3°F (26.3°C) in temperature.
Weather in November » Weather in December
In
December,
Wailuku transitions into cooler, wetter weather, closing the year with increased rainfall and consistently mild temperatures. A higher average rainfall of 0.87" (22mm) decorates the landscape over an average of 9.2 days.
Weather in December »