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Contents
- The climate of Kapaa
- The best time to visit Kapaa
- The worst time to visit Kapaa
- Spring weather in Kapaa
- Summer weather in Kapaa
- Autumn weather in Kapaa
- Winter weather in Kapaa
- 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 sea temperature
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
The climate of Kapaa
Positioned in Hawaii, USA, the scenic town of Kapaa experiences conditions indicative of the Af Köppen climate classification. This signifies that Kapaa benefits from a tropical rainforest climate, hence, the weather is extremely constant, ensuring a generally warm environment throughout the year, regardless of the season.
Delving into Kapaa’s climate intricacies, there exists a noticeable uniformity in weather variables. The variation in monthly average maximum temperatures remains under 5°F (-15°C), oscillating from 73.2°F (22.9°C) to a peak of 79.7°F (26.5°C), demonstrating the minimal changes in the thermal environment. Similarly, a mere 6.3°F (-14.3°C) fluctuation occurs in the average monthly minimum temperature, ranging from 68.5°F (20.3°C) to 75°F (23.9°C).
Rainfall display a uniformity throughout the year as well, although, the wettest period tends to extend from March to August, with rainfalls of 2.52" (64mm) in March, gradually declining to 1.89" (48mm) in August. On the contrary, February and December, register lower precipitation levels of 1.81 and 2.2" (56mm) respectively.
Unique meteorological characteristics do surface for Kapaa, where August tends to be the hottest month of the year, displaying an average daily high temperature above 79.5°F (26.4°C), a relative rarity in Kapaa’s usual weather patterns. Furthermore, September, boasting temperatures between 79.5°F (26.4°C) and 75.9°F (24.4°C) and lower rainfall at just 1.54" (39mm), makes it the driest month, despite the high humidity of 76%.
Delving into Kapaa’s climate intricacies, there exists a noticeable uniformity in weather variables. The variation in monthly average maximum temperatures remains under 5°F (-15°C), oscillating from 73.2°F (22.9°C) to a peak of 79.7°F (26.5°C), demonstrating the minimal changes in the thermal environment. Similarly, a mere 6.3°F (-14.3°C) fluctuation occurs in the average monthly minimum temperature, ranging from 68.5°F (20.3°C) to 75°F (23.9°C).
Rainfall display a uniformity throughout the year as well, although, the wettest period tends to extend from March to August, with rainfalls of 2.52" (64mm) in March, gradually declining to 1.89" (48mm) in August. On the contrary, February and December, register lower precipitation levels of 1.81 and 2.2" (56mm) respectively.
Unique meteorological characteristics do surface for Kapaa, where August tends to be the hottest month of the year, displaying an average daily high temperature above 79.5°F (26.4°C), a relative rarity in Kapaa’s usual weather patterns. Furthermore, September, boasting temperatures between 79.5°F (26.4°C) and 75.9°F (24.4°C) and lower rainfall at just 1.54" (39mm), makes it the driest month, despite the high humidity of 76%.
The best time to visit Kapaa
Owing to pleasant climatic conditions throughout the year, visitors can enjoy their time in Kapaa almost every month. However, between April to June, the weather is particularly inviting. This period offers a delightful blend of moderate rainfall (from 1.3" (33mm) to 1.85" (47mm)), average maximum temperatures, and minimum temperatures. Moreover, the daylight hours increase, ranging from 12.7 to 13.5 hours, allowing more time to explore the beautiful Hawaiian outdoors.
The worst time to visit Kapaa
While there isn't an entirely unfavorable time to visit Kapaa due to its consistent climate, the city experiences its highest rainfall and cloud coverage from July to August, registering precipitations from 1.77" (45mm) up to 1.89" (48mm), coupled with cloud coverage around 44%. Plus, this period has the highest humidity, hovering from 77 to 77%. Consequently, potential visitors might want to consider these factors while planning their trips.
Spring weather in Kapaa
Spring in Kapaa, extending from March to May, greets the city with temperatures between 68.9°F (20.5°C) to 78.3°F (25.7°C), providing a warm and comfortable weather. Rainfall begins to decline during this period, starting at 2.52" (64mm) in March and reducing to 1.57" (40mm) by May. An increase in daylight hours is also noticeable, jumping from 12 hours in March to 13.2 hours in May, amplifying the opportunity to enjoy outdoor activities.
Summer weather in Kapaa
Following the gentle spring, the summer season in Kapaa, June through August, greets the residents and visitors with slightly higher temperatures ranging from 73.9°F (23.3°C) to 79.5°F (26.4°C). Despite the slight uptick in heat, the summer days are balanced with a rise in sea temperatures, starting at 78.4°F (25.8°C) in June and attaining 79.2°F (26.2°C) in August. Even though humidity is slightly higher during this period, the ample sunshine hours (9.7 in June) more than compensate for it.
Autumn weather in Kapaa
Autumn contributes to the pleasant climate in Kapaa. September to November witnesses marginal temperature decline, with minimum and maximum temperatures oscillating from 75.4°F (24.1°C) to 79.5°F (26.4°C) and 74.1°F (23.4°C) to 75.9°F (24.4°C), respectively. The rainfall pattern during this season fluctuates, beginning with 1.54" (39mm) in September, climbing to 2.05" (52mm) in October and not undergoing any change in November. Sunshine hours start at a higher level of 8.7 hours in September and decrease to 6.2 hours by November.
Winter weather in Kapaa
Winter in Kapaa, extending from December to February, offers residents and visitors mild weather conditions. Average temperatures range from 68.5°F (20.3°C) to 75.4°F (24.1°C), enabling outdoor activities even in chillier months, compared to numerous other destinations. While rainfall during this period is somewhat higher, from 1.81" (46mm) to 2.2" (56mm), the daylight hours lessen from 10.8 to 11.4 hours. Slight winds are influential, surging from 11.2mph (18km/h) in December to 11.1mph (17.9km/h) in February, maintaining cool and airy conditions.
Weather in January
Kapaa, Hawaii ushers in the new year with relatively stable weather conditions. January sees a comfortable range of temperatures from 69.6°F (20.9°C) to 74.7°F (23.7°C), which is lower compared to the preceding months. The moderate UV index at 6 ensures minimal risk of sunburn. Weather in January »
Weather in February
February in Kapaa, Hawaii continues January's weather pattern, but with a slight increase in rainfall. The February showers contribute to the year's second-highest rainfall of 1.81" (46mm). Despite the increased rainfall, temperatures and humidity remain relatively consistent with the previous month. Weather in February »
Weather in March
March brings Kapaa, Hawaii to the zenith of the wet season. This month records the highest rainfall for the year, with precipitation totalling 2.52" (64mm). Such rainfall levels are a signal for richer greenery and blooming of flowers. Weather in March »
Weather in April
In April, Kapaa, Hawaii welcomes a marked shift in its weather. This month marks the end of the wet season, with rainfall measuring 1.3" (33mm), which is a noticeable decrease from March. Days become longer, with daylight hours extending towards their peak as the year progresses. Weather in April »
Weather in May
May encapsulates the essence of late spring in Kapaa, Hawaii. Temperatures begin to climb, signifying the transition into warmer months. The noticeable decline in the number of rainfall days, coupled with longer daylight hours and burgeoning sea temperatures, provides an illusion of early summer. Weather in May »
Weather in June
June in Kapaa, Hawaii heralds the arrival of summer. Maximum temperatures soar to hit an annual high of 78.3°F (25.7°C), signaling increased beach activity. The UV index maintains its standard level at 6, rendering sun protection measures vital. Weather in June »
Weather in July
July is the key summer month in Kapaa, Hawaii, marked by rising temperatures. This is the month when the sea temperature warms up to peak at 78.7°F (25.9°C), making beach excursions a favorite pastime. The conditions continue to remain dry with a decrease in rainfall and moderate wind speeds reigning over the region. Weather in July »
Weather in August
August in Kapaa, Hawaii continues the summer trend, with maximum temperatures peaking at 79.7°F (26.5°C) - the highest of the year. The enticing warm sea temperatures and the longer sunshine hours make outdoor activities irresistible. Weather in August »
Weather in September
September brings subtle shifts to the weather in Kapaa, Hawaii. While retaining the warm temperatures from August, this month sees a decline in the daylight hours. The sea remains pleasantly warm, beckoning swimmers and surfers to its shore. Weather in September »
Weather in October
October imbues Kapaa, Hawaii's weather with a distinctive autumnal feel, while retaining the tropical essence. The slight dip in temperatures offsets the rising humidity. An uptick in rainfall signals the onset of the wet season, however, the decrease in daylight hours is somewhat countered by stable sunshine hours. Weather in October »
Weather in November
The penultimate month of the year, November, brings a fresh weather pattern to Kapaa, Hawaii. This month witnesses a slight increase in rainfall to approximately 2.05" (52mm). The fluctuating wind speeds add an element of unpredictability to the weather. Weather in November »
Weather in December
December in Kapaa, Hawaii welcomes the holiday season with typical cooler conditions. This month registers the lowest sea temperature at 76.6°F (24.8°C). As the year draws to a close, a gradual reduction in temperature and daylight hours is observed. Weather in December »
Updated: Aug 23, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the least humid month?
With an average relative humidity of 75%, January is the least humid month in Kapaa.
How many days does it rain?
In Kapaa, during the entire year, the rain falls for 218.4 days and collects up to 22.13" (562mm) of precipitation.
What are the months with the lowest UV index?
The months with the lowest UV index are January through August, October through December, with an average maximum UV index of 6.
What is the coldest month?
Lowest temperatures are observed in February and March, averaging a high-temperature of 73.2°F (22.9°C).
What is the wettest month?
March is the month with the most rainfall. Rain falls for 18.6 days and accumulates 2.52" (64mm) of precipitation.
What month is the ocean coldest?
March is the month with the coldest seawater, with an average ocean temperature of 74.8°F (23.8°C).
What is the driest month?
The month with the least rainfall is April, when the rain falls for 18.3 days and typically collects 1.3" (33mm) of precipitation.
What are the most humid months?
The months with the highest humidity are June through August, October and December, with an average relative humidity of 77%.
When are the longest days?
With an average of 13h and 30min of daylight, June has the longest days of the year.
What month has the most sunshine?
With an average of 9.7h of sunshine, June has the most sunshine of the year.
What month is the hottest?
September, on average, is the warmest month, registering a high temperature of 79.7°F (26.5°C) and a low of 75.9°F (24.4°C).
What is the month with the warmest ocean?
The month with the warmest seawater is September, with an average ocean temperature of 80.2°F (26.8°C).
When is the highest UV index in Kapaa?
The month with the highest UV index is September, with an average maximum UV index of 7.
What is the month with the least sunshine?
November has the least sunshine of the year, with an average of 6.2h of sunshine.
What is the month with the shortest days in Kapaa?
The month with the shortest days is December, with an average of 10h and 48min of daylight.
Is there Daylight Saving Time (DST)?
Kapaa does not observe Daylight Saving Time (DST). HST timezone is used over the entire year.
Average temperature
Kapaa, HI
The warmest month (with the highest average high temperature) is September (79.7°F).
The months with the lowest average high temperature are February and March (73.2°F).
The month with the highest average low temperature is September (75.9°F).
The coldest month (with the lowest average low temperature) is February (68.5°F).
Average pressure
Kapaa, HI
- Average pressure in January:
30.01"Hg - Average pressure in February:
30.02"Hg - Average pressure in March:
30.06"Hg - Average pressure in April:
30.07"Hg - Average pressure in May:
30.05"Hg - Average pressure in June:
30.04"Hg
- Average pressure in July:
30.02"Hg - Average pressure in August:
30"Hg - Average pressure in September:
29.98"Hg - Average pressure in October:
29.98"Hg - Average pressure in November:
30.01"Hg - Average pressure in December:
30.01"Hg
The month with the highest atmospheric pressure is April (30.07"Hg).
The months with the lowest atmospheric pressure are September and October (29.98"Hg).
Average wind speed
Kapaa, HI
- Average wind speed in January:
10mph - Average wind speed in February:
11.1mph - Average wind speed in March:
12mph - Average wind speed in April:
11.5mph - Average wind speed in May:
10.5mph - Average wind speed in June:
12.1mph
- Average wind speed in July:
12.3mph - Average wind speed in August:
12.1mph - Average wind speed in September:
11.1mph - Average wind speed in October:
10.5mph - Average wind speed in November:
12.1mph - Average wind speed in December:
11.2mph
The windiest month (with the highest average wind speed) is July (12.3mph).
The calmest month (with the lowest average wind speed) is January (10mph).
Average humidity
Kapaa, HI
The months with the highest relative humidity are June, July, August, October and December (77%).
The month with the lowest relative humidity is January (75%).
Average rainfall
Kapaa, HI
- Average rainfall in January:
1.57" - Average rainfall in February:
1.81" - Average rainfall in March:
2.52" - Average rainfall in April:
1.3" - Average rainfall in May:
1.57" - Average rainfall in June:
1.85"
- Average rainfall in July:
1.77" - Average rainfall in August:
1.89" - Average rainfall in September:
1.54" - Average rainfall in October:
2.05" - Average rainfall in November:
2.05" - Average rainfall in December:
2.2"
The wettest month (with the highest rainfall) is March (2.52").
The driest month (with the least rainfall) is April (1.3").
Average rainfall days
Kapaa, HI
- Average rainfall days in January:
12.5 days - Average rainfall days in February:
15 days - Average rainfall days in March:
18.6 days - Average rainfall days in April:
18.3 days - Average rainfall days in May:
18.5 days - Average rainfall days in June:
18.8 days
- Average rainfall days in July:
20.9 days - Average rainfall days in August:
21.1 days - Average rainfall days in September:
18.7 days - Average rainfall days in October:
18.7 days - Average rainfall days in November:
19.2 days - Average rainfall days in December:
18.1 days
The month with the highest number of rainy days is August (21.1 days).
The month with the least rainy days is January (12.5 days).
Average sea temperature
Kapaa, HI
The best month for swimming (with the highest average sea temperature) is September (80.2°F).
The coldest month (with the lowest average sea temperature) is March (74.8°F).
Average daylight / Average sunshine
Kapaa, HI
- Average daylight in January:
11h and 0min - Average daylight in February:
11h and 2min - Average daylight in March:
12h and 0min - Average daylight in April:
12h and 4min - Average daylight in May:
13h and 1min - Average daylight in June:
13h and 3min
- Average daylight in July:
13h and 2min - Average daylight in August:
12h and 5min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 4min - Average daylight in November:
11h and 1min - Average daylight in December:
10h and 5min
The month with the longest days is June (Average daylight: 13h and 30min).
The month with the shortest days is December (Average daylight: 10h and 48min).
- Average sunshine in January:
8h and 1min - Average sunshine in February:
7h and 4min - Average sunshine in March:
7h and 3min - Average sunshine in April:
7h and 5min - Average sunshine in May:
9h and 2min - Average sunshine in June:
9h and 4min
- Average sunshine in July:
8h and 4min - Average sunshine in August:
8h and 2min - Average sunshine in September:
8h and 4min - Average sunshine in October:
8h and 2min - Average sunshine in November:
6h and 1min - Average sunshine in December:
6h and 2min
The month with the most sunshine is June (Average sunshine: 9h and 42min).
The month with the least sunshine is November (Average sunshine: 6h and 12min).
Average sunshine days
Kapaa, HI
- Average sunshine days in January:
12.8 days - Average sunshine days in February:
7.8 days - Average sunshine days in March:
6.3 days - Average sunshine days in April:
5.7 days - Average sunshine days in May:
6.7 days - Average sunshine days in June:
5 days
- Average sunshine days in July:
3.9 days - Average sunshine days in August:
2.9 days - Average sunshine days in September:
5.3 days - Average sunshine days in October:
6.3 days - Average sunshine days in November:
4.7 days - Average sunshine days in December:
6.7 days
The month with the most sunshine days is January (12.8 days).
The month with the least sunshine days is August (2.9 days).
Average UV index
Kapaa, HI
The month with the highest UV index is September (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, October, November and December (UV index 6).
Average cloud cover
Kapaa, HI
The month with the most cloud cover is March (Cloud cover 47).
The months with the least cloud cover are January and September (Cloud cover 38).
Average visibility
Kapaa, HI
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Kapaa, Hawaii, USA
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