October weather forecast
Kailua, HI

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Weather in October

October's weather in Kailua signifies an oncoming autumn season with a slight drop in temperature and augmented precipitation. Gathering momentum from September, the rainfall intensifies to 1.46" (37mm), marking October as a wetter month with 16.5 rainfall days. A lesser amount of sunshine hours and decreased daylight is testament of the inceptive autumn season. Among the tranquil weather traits of October, the slight dip in average wind speed to 11.2mph (18km/h) stands out.

Temperature

The arrival of October marks a slight shift to an average high-temperature of a still moderately hot 80.4°F (26.9°C) from September's 80.6°F (27°C). In Kailua, the month of October brings a consistent average low-temperature of 77°F (25°C), slightly cooler than its daytime highs.

Humidity

In Kailua, Hawaii, the average relative humidity in October is 75%.

Rainfall

In Kailua, Hawaii, in October, during 16.5 rainfall days, 1.46" (37mm) of precipitation is typically accumulated. In Kailua, during the entire year, the rain falls for 169.9 days and collects up to 13.15" (334mm) of precipitation.

Ocean temperature

In Kailua, the average seawater temperature in October is 80.1°F (26.7°C).
Note: 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.

Daylight

In Kailua, the average length of the day in October is 11h and 38min.
On the first day of the month, sunrise is at 6:22 am and sunset at 6:18 pm. On the last day of October, in Kailua, Hawaii, sunrise is at 6:34 am and sunset at 5:55 pm HST.

Sunshine

The average sunshine in October is 8.5h.

UV index

The months with the highest UV index are July through October, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for the average person.
Note: In October, a regular UV index of 7 translates into these guidelines:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Take warning! Reflective sand and water surfaces intensify the Sun's UV rays.
Updated: Feb 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Kailua in October?

In October, in Kailua, the average high-temperature is 80.4°F (26.9°C), and the average low-temperature is 77°F (25°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines air temperature and relative humidity, in September is appraised at 84.2°F (29°C).

What is the average humidity in October in Kailua?

In Kailua, the average relative humidity in October is 75%.

How many days does it rain in October in Kailua?

In Kailua, Hawaii, in October, during 16.5 rainfall days, 1.46" (37mm) of precipitation is typically accumulated.

What is the ocean temperature in October in Kailua?

In Kailua, in October, the average water temperature is 80.1°F (26.7°C). For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

How many hours of daylight does Kailua have in October?

The average day length in October in Kailua is 11h and 38min.

What time are sunrise and sunset in October in Kailua?

In October, on the first day of the month, sunrise is at 6:22 am and sunset at 6:18 pm. On the last day of the month, sunrise is at 6:34 am and sunset at 5:55 pm HST.

How long on average sun shines in October in Kailua?

In Kailua, Hawaii, the average sunshine duration in October is 8.5h.

What is the month with the highest UV index in Kailua?

The months with the highest UV index in Kailua, Hawaii, are July through October, with an average maximum UV index of 7.

What is the UV index reading in October in Kailua?

In Kailua, Hawaii, the average daily maximum UV index in October is 7. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in October
Kailua, HI

Average temperature in October - Kailua, HI
  • Average high temperature in October: 80.4°F

The warmest month (with the highest average high temperature) is September (80.6°F).
The month with the lowest average high temperature is February (74.5°F).

  • Average low temperature in October: 77°F

The months with the highest average low temperature are September and October (77°F).
The coldest month (with the lowest average low temperature) is February (70.5°F).

Average pressure in October
Kailua, HI

Average pressure in October - Kailua, HI
  • Average pressure in October: 29.97"Hg

The month with the highest atmospheric pressure is April (30.06"Hg).
The months with the lowest atmospheric pressure are September and October (29.97"Hg).

Average wind speed in October
Kailua, HI

Average wind speed in October - Kailua, HI
  • Average wind speed in October: 11.2mph

The windiest month (with the highest average wind speed) is July (14.1mph).
The calmest month (with the lowest average wind speed) is January (10.7mph).

Average humidity in October
Kailua, HI

Average humidity in October - Kailua, HI
  • Average humidity in October: 75%

The months with the highest relative humidity are April, June, July, August and December (76%).
The months with the lowest relative humidity are January and November (74%).

Average rainfall in October
Kailua, HI

Average rainfall in October - Kailua, HI
  • Average rainfall in October: 1.46"

The wettest month (with the highest rainfall) is March (1.69").
The driest month (with the least rainfall) is July (0.55").

Average rainfall days in October
Kailua, HI

Average rainfall days in October - Kailua, HI
  • Average rainfall days in October: 16.5 days

The month with the highest number of rainy days is March (16.9 days).
The month with the least rainy days is June (11.3 days).

Average sea temperature in October
Kailua, HI

Average sea temperature in October - Kailua, HI
  • Average sea temperature in October: 80°F

The best month for swimming (with the highest average sea temperature) is September (80.4°F).
The coldest month (with the lowest average sea temperature) is March (75.7°F).

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

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

The month with the longest days is June (Average daylight: 13h and 24min).
The month with the shortest days is December (Average daylight: 10h and 54min).

  • Average sunshine in October: 8h and 3min

The month with the most sunshine is June (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).

Average sunshine days in October
Kailua, HI

Average sunshine days in October - Kailua, HI
  • Average sunshine days in October: 7 days

The month with the most sunshine days is June (13.6 days).
The months with the least sunshine days are March and November (6.6 days).

Average UV index in October
Kailua, HI

Average UV index in October - Kailua, HI
  • Average UV index in October: 7

The months with the highest UV index are July, August, September and October (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, November and December (UV index 6).

Average cloud cover in October
Kailua, HI

Average cloud cover in October - Kailua, HI
  • Average cloud cover in October: 30

The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is September (Cloud cover 27).

Average visibility in October
Kailua, HI

Average visibility in October - Kailua, 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).

Kailua, Hawaii, USA

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