October weather forecast
Kapaa, HI

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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. The fluctuating conditions highlight the dynamic weather in this paradise archipelago.

Temperature

October brings a marginal elevation to a still warm 79.5°F (26.4°C) from September's 79.7°F (26.5°C) in Kapaa's average high-temperatures. Kapaa's average low temperature, barely cooler than the daytime high, steadies at a still warm 75.4°F (24.1°C) during October.

Humidity

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

Rainfall

In October, the rain falls for 18.7 days. Throughout October, 2.05" (52mm) of precipitation is accumulated. Throughout the year, in Kapaa, there are 218.4 rainfall days, and 22.13" (562mm) of precipitation is accumulated.

Ocean temperature

In Kapaa, in October, the average water temperature is 79.5°F (26.4°C).
Note: For any water activity, having surface water temperatures from 77°F (25°C) to 84.2°F (29°C) is considered outstanding and highly delightful for lengthened periods.

Daylight

The average length of the day in October is 11h and 38min.
On the first day of the month, sunrise is at 6:28 am and sunset at 6:24 pm. On the last day of October, sunrise is at 6:41 am and sunset at 6:00 pm HST.

Sunshine

In October, the average sunshine is 8.4h.

UV index

January through August, October through December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for the average person.
Note: A maximum high UV index of 6 in October translates into the following recommendations:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. Enhance your sun protection with tightly woven, yet airy clothing. Warning! Sand and water reflections boost the intensity of UV exposure.
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Frequently asked questions

What are October temperatures in Kapaa?

During October, Kapaa experiences an average high-temperature of 79.5°F (26.4°C) and a low-temperature of 75.4°F (24.1°C).

What is the most humid month in Kapaa?

June through August, October and December, with an average relative humidity of 77%, are most humid months.

What is the average humidity in October in Kapaa?

In October, the average relative humidity in Kapaa, Hawaii, is 77%.

How much does it rain in Kapaa in October?

In Kapaa, during October, the rain falls for 18.7 days and regularly aggregates up to 2.05" (52mm) of precipitation.

What is the water temperature in October in Kapaa?

In Kapaa, the average seawater temperature in October is 79.5°F (26.4°C). For any water activity, surface water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered as excellent and extremely pleasant for lengthened periods.

How many hours of daylight does Kapaa have in October?

In October, the average day length is 11h and 38min.

What time are sunrise and sunset in October in Kapaa?

In October, on the first day of the month, sunrise is at 6:28 am and sunset at 6:24 pm. On the last day of the month, in Kapaa, Hawaii, sunrise is at 6:41 am and sunset at 6:00 pm HST.

How long on average sun shines in October in Kapaa?

In October, the average sunshine duration in Kapaa is 8.4h.

When is 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.

How high is the UV index in October in Kapaa?

In Kapaa, Hawaii, the average daily maximum UV index in October is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to Sun's UV rays.

Average temperature in October
Kapaa, HI

Average temperature in October - Kapaa, HI
  • Average high temperature in October: 79.5°F

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).

  • Average low temperature in October: 75.4°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).

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Average pressure in October
Kapaa, HI

Average pressure in October - Kapaa, HI
  • Average pressure in October: 29.98"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).

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Average wind speed in October
Kapaa, HI

Average wind speed in October - Kapaa, HI
  • Average wind speed in October: 10.5mph

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).

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Average humidity in October
Kapaa, HI

Average humidity in October - Kapaa, HI
  • Average humidity in October: 77%

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%).

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Average rainfall in October
Kapaa, HI

Average rainfall in October - Kapaa, HI
  • Average rainfall in October: 2.05"

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

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Average rainfall days in October
Kapaa, HI

Average rainfall days in October - Kapaa, HI
  • Average rainfall days in October: 18.7 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).

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Average sea temperature in October
Kapaa, HI

Average sea temperature in October - Kapaa, HI
  • Average sea temperature in October: 79.5°F

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).

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Average daylight in October /
Average sunshine in October
Kapaa, HI

Average daylight in October / Average sunshine in October - Kapaa, HI
  • Average daylight in October: 11h and 4min

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 October: 8h 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).

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Average sunshine days in October
Kapaa, HI

Average sunshine days in October - Kapaa, HI
  • Average sunshine days in October: 6.3 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).

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Average UV index in October
Kapaa, HI

Average UV index in October - Kapaa, HI
  • Average UV index in October: 6

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).

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Average cloud cover in October
Kapaa, HI

Average cloud cover in October - Kapaa, HI
  • Average cloud cover in October: 40

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).

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Average visibility in October
Kapaa, HI

Average visibility in October - Kapaa, HI
  • Average visibility in October: 6mi

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).

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Kapaa, Hawaii, USA

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