Climate and monthly weather forecast
Kapaa, HI

Weather in January

January, like December, in Kapaa, Hawaii, is another warm winter month, with temperature in the range of an average low of 69.6°F (20.9°C) and an average high of 74.7°F (23.7°C). In January, the average high-temperature is relatively the same as in December - a still moderately hot 74.7°F (23.7°C). Weather in January »

Weather in February

February, the last month of the winter in Kapaa, is another pleasant month, with an average temperature varying between 73.2°F (22.9°C) and 68.5°F (20.3°C). The coldest months are February and March, with an average high-temperature of 73.2°F (22.9°C). Weather in February »

Weather in March

March, the first month of the spring in Kapaa, is also an agreeable month, with temperature in the range of an average high of 73.2°F (22.9°C) and an average low of 68.9°F (20.5°C). The coldest months are February and March, with an average high-temperature of 73.2°F (22.9°C). Weather in March »

Weather in April

April in Kapaa, Hawaii, is a moderately hot spring month, with temperature in the range of an average high of 74.8°F (23.8°C) and an average low of 70.9°F (21.6°C). In April, the average high-temperature is almost the same as in March - a moderately hot 74.8°F (23.8°C). Weather in April »

Weather in May

The last month of the spring, May, is also a moderately hot month in Kapaa, Hawaii, with an average temperature ranging between max 76.8°F (24.9°C) and min 72.1°F (22.3°C). In Kapaa, Hawaii, the average high-temperature in May is essentially the same as in April - a still moderately hot 76.8°F (24.9°C). Weather in May »

Weather in June

The first month of the summer, June, is also a moderately hot month in Kapaa, Hawaii, with an average temperature varying between 73.9°F (23.3°C) and 78.3°F (25.7°C). In June, the average high-temperature is relatively the same as in May - a still moderately hot 78.3°F (25.7°C). Weather in June »

Weather in July

July, like June, in Kapaa, Hawaii, is another warm summer month, with temperature in the range of an average low of 75°F (23.9°C) and an average high of 79°F (26.1°C). In Kapaa, the average high-temperature in July is relatively the same as in June - a still moderately hot 79°F (26.1°C). Weather in July »

Weather in August

August, the last month of the summer in Kapaa, is also a moderately hot month, with an average temperature varying between 79.5°F (26.4°C) and 75.7°F (24.3°C). In Kapaa, Hawaii, the average high-temperature in August is relatively the same as in July - a still warm 79.5°F (26.4°C). Weather in August »

Weather in September

The first month of the autumn, September, is also a moderately hot month in Kapaa, Hawaii, with an average temperature varying between 79.7°F (26.5°C) and 75.9°F (24.4°C). September is the warmest month, with an average high-temperature of 79.7°F (26.5°C) and an average low-temperature of 75.9°F (24.4°C). Weather in September »

Weather in October

October, like September, in Kapaa, Hawaii, is a moderately hot autumn month, with an average temperature varying between 79.5°F (26.4°C) and 75.4°F (24.1°C). In Kapaa, the average high-temperature in October is almost the same as in September - a still moderately hot 79.5°F (26.4°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a moderately hot month in Kapaa, Hawaii, with an average temperature varying between 77.2°F (25.1°C) and 74.1°F (23.4°C). In Kapaa, the average high-temperature in November is almost the same as in October - a still moderately hot 77.2°F (25.1°C). Weather in November »

Weather in December

The first month of the winter, December, is also a moderately hot month in Kapaa, Hawaii, with temperature in the range of an average low of 71.8°F (22.1°C) and an average high of 75.4°F (24.1°C). In Kapaa, the average high-temperature in December is relatively the same as in November - a still warm 75.4°F (24.1°C). Weather in December »
[Resources]

FAQ

What is the least humid month in Kapaa?

The least humid month in Kapaa is January, with an average relative humidity of 75%.

How much does it rain in Kapaa?

In Kapaa, during the entire year, the rain falls for 218.4 days and collects up to 22.13" (562mm) of precipitation.

What is the month with the lowest UV index in Kapaa?

January through August, October through December, with an average maximum UV index of 6, are months with the lowest UV index in Kapaa, Hawaii.

What is the coldest month in Kapaa?

The coldest months are February and March, with an average high-temperature of 73.2°F (22.9°C).

What is the rainiest month in Kapaa?

March is the month with the most rainfall in Kapaa, Hawaii. Rain falls for 18.6 days and accumulates 2.52" (64mm) of precipitation.

What is the month with the coldest ocean in Kapaa?

The month with the coldest seawater is March, with an average ocean temperature of 74.8°F (23.8°C).

What is the driest month in Kapaa?

April is the month with the least rainfall in Kapaa, Hawaii. Rain falls for 18.3 days and accumulates 1.3" (33mm) of precipitation.

What is the most humid month in Kapaa?

The months with the highest humidity in Kapaa are June through August, October and December, with an average relative humidity of 77%.

When are the longest days in Kapaa?

With an average of 13h and 28min of daylight, June has the longest days of the year.

What month has the most sunshine in Kapaa?

June has the most sunshine of the year, with an average of 9.7h of sunshine.

What is the warmest month in Kapaa?

September is the warmest month, with an average high-temperature of 79.7°F (26.5°C) and an average low-temperature of 75.9°F (24.4°C).

What is the month with the warmest ocean in Kapaa?

The month with the warmest seawater in Kapaa, Hawaii, is September, with an average ocean temperature of 80.2°F (26.8°C).

When is the highest UV index in Kapaa?

With an average maximum UV index of 7, September is the month with the highest UV index in Kapaa.

What is the month with the least sunshine in Kapaa?

November has the least sunshine of the year in Kapaa, Hawaii, with an average of 6.2h of sunshine.

What is the month with the shortest days in Kapaa?

December has the shortest days of the year, with an average of 10h and 49min of daylight.

Is there Daylight Saving Time (DST) in Kapaa?

Kapaa does not utilize Daylight Saving Time (DST). HST timezone is used over the entire year.

Average temperature
Kapaa, HI

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).

[Resources]

Average pressure
Kapaa, HI

Average pressure - Kapaa, HI

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).

[Resources]

Average wind speed
Kapaa, HI

Average wind speed - Kapaa, HI

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).

[Resources]

Average humidity
Kapaa, HI

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%).

[Resources]

Average rainfall
Kapaa, HI

Average rainfall - Kapaa, HI

The wettest month (with the highest rainfall) is March (2.52").
The driest month (with the least rainfall) is April (1.3").

[Resources]

Average rainfall days
Kapaa, HI

Average rainfall days - Kapaa, HI

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).

[Resources]

Average sea temperature
Kapaa, HI

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).

[Resources]

Average daylight / Average sunshine
Kapaa, HI

Average daylight / Average sunshine - Kapaa, HI

The month with the longest days is June (Average daylight: 13h and 28min).
The month with the shortest days is December (Average daylight: 10h and 49min).

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).

[Resources]

Average sunshine days
Kapaa, HI

Average sunshine days - Kapaa, HI

The month with the most sunshine days is January (12.8 days).
The month with the least sunshine days is August (2.9 days).

[Resources]

Average UV index
Kapaa, HI

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).

[Resources]

Average visibility
Kapaa, HI

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).

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location