October weather forecastHonolulu, HI
October
Weather in October
October in Honolulu registers perceptible changes in the weather, ushering in the fall season. Rainfall increases to its highest in the half-year at 1.81" (46mm), and a moderate increase in cloud cover is noticeable. Despite this, the sea temperature remains inviting, and sunshine stays abundant. The wind speed records a slight decrease compared to the previous month, contributing to mellower days. The delightful weather in October makes it a perfect setting for travelers seeking fewer crowd and a relaxed vacation experience.Temperature
Shifting into October, Honolulu records an average high-temperature of a still moderately hot 81°F (27.2°C), presenting minor fluctuations compared to the previous month. During the October nights, Honolulu's temperature maintains an average close to the daytime highs, settling at a still warm 75.6°F (24.2°C).Heat index
For most parts of October, the heat index is appraised at a hot 86°F (30°C). If one continues to be active during enduring exposure, it could result in fatigue and heat cramps.It is worth noting that heat index values are gauged for conditions in the shade and light breezes. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'felt air temperature' or 'real feel', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. Do note, being directly under sun rays can amplify the heat you feel, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.
Humidity
The average relative humidity in October is 75%.Rainfall
The months with the most rainfall in Honolulu are March and October, with an average 1.81" (46mm) of precipitation.Ocean temperature
In Honolulu, the average seawater temperature in October is 80.1°F (26.7°C).Note: For water activities like swimming, diving, and more, temperatures ranging between 77°F (25°C) and 84.2°F (29°C) offer superior comfort and enjoyment for lengthy durations.
Daylight
In October, the average length of the day is 11h and 39min.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, sunrise is at 6:34 am and sunset at 5:55 pm HST.
Sunshine
In Honolulu, Hawaii, the average sunshine in October is 8.2h.UV index
January through June, October through December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for average individuals.Note: In October, a daily UV index of 6 turns into the following recommendations:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Caution! The mirror effect of sand and water ups the UV radiation strength.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in October
Honolulu, HI
- Average high temperature in October: 81°F
The warmest month (with the highest average high temperature) is September (81.5°F).
The months with the lowest average high temperature are February and March (75°F).
- Average low temperature in October: 75.6°F
The month with the highest average low temperature is August (75.7°F).
The coldest month (with the lowest average low temperature) is February (69.1°F).
Average pressure in October
Honolulu, 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
Honolulu, HI
- Average wind speed in October: 9.2mph
The windiest month (with the highest average wind speed) is July (12.1mph).
The calmest month (with the lowest average wind speed) is January (9mph).
Average humidity in October
Honolulu, HI
- Average humidity in October: 75%
The months with the highest relative humidity are February and December (76%).
The months with the lowest relative humidity are April, May, September and November (74%).
Average rainfall in October
Honolulu, HI
- Average rainfall in October: 1.81"
The wettest months (with the highest rainfall) are March and October (1.81").
The driest month (with the least rainfall) is July (0.67").
Average rainfall days in October
Honolulu, HI
- Average rainfall days in October: 18 days
The months with the highest number of rainy days are March and October (18 days).
The month with the least rainy days is January (12.6 days).
Average sea temperature in October
Honolulu, 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
Honolulu, HI
- Average daylight in October: 11h and 36min
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 12min
The month with the most sunshine is June (Average sunshine: 10h and 48min).
The months with the least sunshine are November and December (Average sunshine: 6h and 30min).
Average sunshine days in October
Honolulu, 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 October (6.3 days).
Average UV index in October
Honolulu, HI
- Average UV index in October: 6
The months with the highest UV index are July, August and September (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, October, November and December (UV index 6).
Average cloud cover in October
Honolulu, HI
- Average cloud cover in October: 36
The month with the most cloud cover is March (Cloud cover 40).
The months with the least cloud cover are January and September (Cloud cover 33).
Average visibility in October
Honolulu, 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).
