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Contents
- The climate of Koloa
- The best time to visit Koloa
- The worst time to visit Koloa
- Spring weather in Koloa
- Summer weather in Koloa
- Autumn weather in Koloa
- Winter weather in Koloa
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
The climate of Koloa
Koloa, Tonga stands in the influence of a tropical rainforest climate according to the Köppen climate classification, most commonly depicted as Af. It is located in the southern region of the Pacific Ocean, where tropical weather patterns prevail.
Throughout the year, the weather of Koloa remains predominantly warm and humid. The relatively constant high temperature ranges from 24.8°C (76.6°F) in August to a peak of 28.3°C (82.9°F) in February. Correspondingly, the bottom temperature exhibits a mild variation, dropping from 27.2°C (81°F) in January to 23.7°C (74.7°F) in July. Humidity remains high round the year, barely wavering from 77% to 79%. Thus, it makes a vital contribution to the overall warmth of the weather in Koloa.
Coming to precipitation, Koloa enters a period of significant rainfall from January to April with peaks at 275mm (10.83") in January and drops toward August revealing a modest 42mm (1.65"). A gradual increment is subsequently observed, reaching 139mm (5.47") in December. Alongside this pattern, rainy days follow suit, lessening from 23 in January to a mere 14.6 in August before incrementing again. Remarkably, despite its tropical nature, Koloa features a distinct dry spell in summer.
The daylight hours stand between 11 to 13.2 hours throughout the year, with the lengthiest in December and the shortest in June. Sunshine hours range marginally from 6.6 hours to 8.2 hours, reflecting the relatively stable tropical climate. The UV Index remains steady at 6 for the majority of the year, excluding January to April and December when it surges to 7.
Throughout the year, the weather of Koloa remains predominantly warm and humid. The relatively constant high temperature ranges from 24.8°C (76.6°F) in August to a peak of 28.3°C (82.9°F) in February. Correspondingly, the bottom temperature exhibits a mild variation, dropping from 27.2°C (81°F) in January to 23.7°C (74.7°F) in July. Humidity remains high round the year, barely wavering from 77% to 79%. Thus, it makes a vital contribution to the overall warmth of the weather in Koloa.
Coming to precipitation, Koloa enters a period of significant rainfall from January to April with peaks at 275mm (10.83") in January and drops toward August revealing a modest 42mm (1.65"). A gradual increment is subsequently observed, reaching 139mm (5.47") in December. Alongside this pattern, rainy days follow suit, lessening from 23 in January to a mere 14.6 in August before incrementing again. Remarkably, despite its tropical nature, Koloa features a distinct dry spell in summer.
The daylight hours stand between 11 to 13.2 hours throughout the year, with the lengthiest in December and the shortest in June. Sunshine hours range marginally from 6.6 hours to 8.2 hours, reflecting the relatively stable tropical climate. The UV Index remains steady at 6 for the majority of the year, excluding January to April and December when it surges to 7.
The best time to visit Koloa
Given the pattern of climatological parameters, the most desirable time to visit Koloa would arguably be from June to October. During these months, the rainfall curbs significantly, and daylight lasts for approximately 11 to 12.5 hours. On top of that, this period also witnesses relatively lower humidity and cooler temperatures. Thus, it offers an optimal climate for outdoor activities and sightseeing.
The worst time to visit Koloa
For those not comfortable navigating in heavy rainfall and higher temperatures, the start of the year, particularly from January to April, could pose challenges. The prevalent weather conditions involve higher temperatures and the highest incidences of rainfall.
Spring weather in Koloa
Although the tropical climate in Kolao does not significantly differ throughout the year, a slight variation can be seen in the spring season. The months of March, April, and May experience a decrease in both temperature and rainfall. The high temperature goes from 28°C (82.4°F) in March to 26.6°C (79.9°F) in May, and the rainfall drops slowly from 133mm (5.24") to 94mm (3.7").
Summer weather in Koloa
Summers in Koloa, comprising June, July, and August, are characterized by a drastic plunge in rainfall, with precipitation values standing between 50mm (1.97") to 42mm (1.65"). The top temperature dips to an annual low of 24.8°C (76.6°F) in August, while humidity remains relatively consistent. Despite being the least rainy period of the year, the wind speed heightens in summer, reaching up to 27km/h (16.8mph) and gusty winds as fast as 36.6km/h (22.7mph) in June.
Autumn weather in Koloa
The autumn months - September, October, and November in Koloa witness a gradual increase in rainfall and temperature. While September and October endure a slight increment in rainfall, November observes a more evident surge to 80mm (3.15"). High temperatures also embark on a progressive climb, hitting 26.2°C (79.2°F) in November.
Winter weather in Koloa
Winter in Koloa starts in December and continues through February. Despite being winter, the season does not bring a significant drop in temperature but rather sees the year's highest temperatures with highs ranging from 27.8°C (82°F) in December to 28.3°C (82.9°F) in February. The rainfall soars in December to 139mm (5.47"), thereafter moderating slightly in the coming months. The period also features the annual maximum daylight of 13.2 hours and sunshine duration escalating beyond 8 hours.
Weather in January
Koloa, Tonga starts the year in January with high humidity and a significant amount of rainfall contributing to the wet season. January's heavy monsoon showers result in a total rainfall of 275mm (10.83"), the highest in the year. Weather in January »
Weather in February
As we delve into February, Koloa's weather subtly starts to transition. February sees a slight decrease in rainfall from January's peak to a still substantial 217mm (8.54"). Despite the slightly reduced rain, the weather maintains its tropical charm with warm temperatures, high humidity and relatively stable pressure. Weather in February »
Weather in March
March brings with it a significant change in Koloa's tropical weather as the wet season starts to wind down. The city witnesses a marked drop in rainfall to 133mm (5.24") from February's 217mm (8.54"). An increased daily sunshine prevails, indicating a shift towards more favourable weather conditions. Weather in March »
Weather in April
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. Weather in April »
Weather in May
May kicks off by maintaining the pleasant weather pattern established in April. The decrease in rainfall continues steadfastly, from 128mm (5.04") in April to 94mm (3.7") in May. Alongside mild temperatures and moderate winds, the slightly cooler nights bring a refreshing change to Koloa. Weather in May »
Weather in June
June in Koloa, Tonga continues the trend of the rainy season withdrawal. Further decline in rainfall is noticeable; with 50mm (1.97"), June records the least rainfall in the year. The clear skies and enhanced sunshine make for an excellent time for sightseeing and beach activities. Weather in June »
Weather in July
July in Koloa embraces the driest period of the year. With marginal rainfall reaching only 53mm (2.09"), there's a predominant pattern of pleasant weather. The weather is dominated by steady temperatures, moderate humidity, and increased sunshine, making it favourable for outdoor activities. Weather in July »
Weather in August
August in Koloa, Tonga is characterized by stable and pleasant weather conditions. The rainfall remains low, slightly decreasing to 42mm (1.65"), the second-lowest in the year. The skies are predominantly blue, ensuring plenty of sunshine and scenic views of the surroundings. Weather in August »
Weather in September
September sees a continuation of stable weather conditions in Koloa. There's a minor increase in rainfall to 44mm (1.73"), although the weather remains relatively dry. The cooling sea breezes coupled with a relative increase in cloud cover contribute to slightly lower temperatures. Weather in September »
Weather in October
October ushers in a seasonal change in Koloa, with a slight increase in both rainfall and humidity. The month records rainfall of 78mm (3.07"), a substantial increase from September's 44mm (1.73"). Temperatures remain consistent and comfortable, accompanied by occasional showers and cloud cover. Weather in October »
Weather in November
As November sets in, Koloa inches closer towards its wet season. Accompanying the transition, November records an increase in rainfall to 80mm (3.15") from October's 78mm (3.07"). This month is characterized by a slight increase in cloud cover, hinting at the onset of heavy showers. Weather in November »
Weather in December
Koloa, Tonga closes the year in December, firmly into its wet season. A substantial increase in rainfall brings the totals to 139mm (5.47"), a jump from November's 80mm (3.15"). December ushers in heat, humidity and increased cloud cover, a pattern reminiscent of January. Weather in December »
Updated: Feb 5, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the wettest month in Koloa?
January is the month with the most rainfall in Koloa. Rain falls for 23 days and accumulates 275mm (10.83") of precipitation.
How many days does it rain in Koloa?
In Koloa, Tonga, during the entire year, the rain falls for 227.2 days and collects up to 1333mm (52.48") of precipitation.
What are the months with the highest UV index in Koloa?
The months with the highest UV index in Koloa are January through April and December, with an average maximum UV index of 7.
What is the hottest time of year in Koloa?
In Koloa, February is the month with the highest recorded average temperatures, measuring a high of 28.3°C (82.9°F) and a low of 27.3°C (81.1°F).
What is the least humid month in Koloa?
With an average relative humidity of 77%, April is the least humid month in Koloa.
When is the lowest UV index in Koloa?
May through November, with an average maximum UV index of 6, are months with the lowest UV index in Koloa.
What is the month with the shortest days in Koloa?
The month with the shortest days is June, with an average of 11h and 0min of daylight.
What is the driest month in Koloa?
August is the month with the least rainfall in Koloa, Tonga. Rain falls for 14.6 days and accumulates 42mm (1.65") of precipitation.
What time of the year is the coldest in Koloa?
In Koloa, Tonga, the average lowest temperatures are observed in September, with a high of 24.7°C (76.5°F) and a low of 23.9°C (75°F).
What is the most humid month in Koloa?
The months with the highest humidity in Koloa are September through November, with an average relative humidity of 79%.
What is the month with the least sunshine in Koloa?
September has the least sunshine of the year in Koloa, Tonga, with an average of 6.6h of sunshine.
When are the longest days in Koloa?
With an average of 13h and 12min of daylight, December has the longest days of the year.
Is there Daylight Saving Time (DST) in Koloa?
Koloa, Tonga, does not observe Daylight Saving Time (DST). +13 timezone is used over the entire year.
What month has the most sunshine in Koloa?
With an average of 8.2h of sunshine, December has the most sunshine of the year in Koloa.
Average temperature
Koloa, Tonga
The warmest month (with the highest average high temperature) is February (28.3°C).
The month with the lowest average high temperature is September (24.7°C).
The month with the highest average low temperature is February (27.3°C).
The coldest month (with the lowest average low temperature) is July (23.7°C).
Average pressure
Koloa, Tonga
- Average pressure in January:
1007.8mbar - Average pressure in February:
1008.1mbar - Average pressure in March:
1010.1mbar - Average pressure in April:
1011.6mbar - Average pressure in May:
1012.9mbar - Average pressure in June:
1014.3mbar
- Average pressure in July:
1014.5mbar - Average pressure in August:
1014.8mbar - Average pressure in September:
1014.8mbar - Average pressure in October:
1013.6mbar - Average pressure in November:
1011.6mbar - Average pressure in December:
1009.8mbar
The months with the highest atmospheric pressure are August and September (1014.8mbar).
The month with the lowest atmospheric pressure is January (1007.8mbar).
Average wind speed
Koloa, Tonga
- Average wind speed in January:
22.7km/h - Average wind speed in February:
23.2km/h - Average wind speed in March:
20.2km/h - Average wind speed in April:
23km/h - Average wind speed in May:
25.4km/h - Average wind speed in June:
27km/h
- Average wind speed in July:
26.9km/h - Average wind speed in August:
26.6km/h - Average wind speed in September:
25.7km/h - Average wind speed in October:
25.9km/h - Average wind speed in November:
24km/h - Average wind speed in December:
24.5km/h
The windiest month (with the highest average wind speed) is June (27km/h).
The calmest month (with the lowest average wind speed) is March (20.2km/h).
Average humidity
Koloa, Tonga
The months with the highest relative humidity are September, October and November (79%).
The month with the lowest relative humidity is April (77%).
Average rainfall
Koloa, Tonga
- Average rainfall in January:
275mm - Average rainfall in February:
217mm - Average rainfall in March:
133mm - Average rainfall in April:
128mm - Average rainfall in May:
94mm - Average rainfall in June:
50mm
The wettest month (with the highest rainfall) is January (275mm).
The driest month (with the least rainfall) is August (42mm).
Average rainfall days
Koloa, Tonga
- Average rainfall days in January:
23 days - Average rainfall days in February:
24.3 days - Average rainfall days in March:
24.3 days - Average rainfall days in April:
19.7 days - Average rainfall days in May:
18.3 days - Average rainfall days in June:
14.8 days
- Average rainfall days in July:
15.1 days - Average rainfall days in August:
14.6 days - Average rainfall days in September:
15 days - Average rainfall days in October:
18.3 days - Average rainfall days in November:
17.6 days - Average rainfall days in December:
22.2 days
The months with the highest number of rainy days are February and March (24.3 days).
The month with the least rainy days is August (14.6 days).
Average daylight / Average sunshine
Koloa, Tonga
- Average daylight in January:
13h and 1min - Average daylight in February:
12h and 4min - Average daylight in March:
12h and 1min - Average daylight in April:
11h and 4min - Average daylight in May:
11h and 1min - Average daylight in June:
11h and 0min
- Average daylight in July:
11h and 1min - Average daylight in August:
11h and 3min - Average daylight in September:
12h and 0min - Average daylight in October:
12h and 3min - Average daylight in November:
13h and 0min - Average daylight in December:
13h and 1min
The month with the longest days is December (Average daylight: 13h and 12min).
The month with the shortest days is June (Average daylight: 11h and 0min).
- Average sunshine in January:
7h and 0min - Average sunshine in February:
7h and 2min - Average sunshine in March:
7h and 4min - Average sunshine in April:
7h and 2min - Average sunshine in May:
7h and 0min - Average sunshine in June:
6h and 5min
- Average sunshine in July:
7h and 1min - Average sunshine in August:
6h and 4min - Average sunshine in September:
6h and 4min - Average sunshine in October:
6h and 5min - Average sunshine in November:
7h and 5min - Average sunshine in December:
8h and 1min
The month with the most sunshine is December (Average sunshine: 8h and 12min).
The month with the least sunshine is September (Average sunshine: 6h and 36min).
Average sunshine days
Koloa, Tonga
- Average sunshine days in January:
4.3 days - Average sunshine days in February:
2.3 days - Average sunshine days in March:
4 days - Average sunshine days in April:
6.5 days - Average sunshine days in May:
7.6 days - Average sunshine days in June:
10.1 days
- Average sunshine days in July:
10.3 days - Average sunshine days in August:
11.8 days - Average sunshine days in September:
10.3 days - Average sunshine days in October:
8.3 days - Average sunshine days in November:
6.9 days - Average sunshine days in December:
5.5 days
The month with the most sunshine days is August (11.8 days).
The month with the least sunshine days is February (2.3 days).
Average UV index
Koloa, Tonga
The months with the highest UV index are January, February, March, April and December (UV index 7).
The months with the lowest UV index are May, June, July, August, September, October and November (UV index 6).
Average cloud cover
Koloa, Tonga
The month with the most cloud cover is October (Cloud cover 55).
The month with the least cloud cover is March (Cloud cover 46).
Average visibility
Koloa, Tonga
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is January (9km).
Koloa, Tonga
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