October weather forecast
Ewa Beach, HI

As October rolls in, Ewa Beach commences its descent into the cooler season. However, the most impressive feature of October is not the dropping temperatures, but the equal duration of day and night. Along with this fascinating phenomenon, rainfall sees an upward shift, making the evenings more refreshing. Despite the reducing temperatures, the sea remains welcoming for mild water sports. While days remain sunny, the gradually encroaching nights usher in the comforting coolness that defines island autumn.

Temperature

The introduction of October in Ewa Beach, Hawaii, notes a subtle temperature variation to a still moderately hot 81.1°F (27.3°C) from September's 81.5°F (27.5°C). Ewa Beach consistently logs a low temperature averaging a still moderately hot 76.1°F (24.5°C) during October, a modest drop from daytime temperatures.

Heat index

October's average heat index is appraised at a hot 86°F (30°C). Exhaustion might be the outcome of enduring exposure and continuous activity, with a risk of heat cramps.
It is emphasized that the heat index's values are meant for shaded zones with mild winds. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.

Humidity

January, April through June, August through November, with an average relative humidity of 74%, are the least humid months.

Rainfall

In October, the rain falls for 15.7 days. Throughout October, 1.42" (36mm) of precipitation is accumulated. In Ewa Beach, during the entire year, the rain falls for 172.2 days and collects up to 12.72" (323mm) of precipitation.

Ocean temperature

In Ewa Beach, in October, the average water temperature is 79.9°F (26.6°C).
Note: For swimming, diving, or other water activities, temperatures from 77°F (25°C) to 84.2°F (29°C) provide the most enjoyable experience for extended periods without discomfort.

Daylight

In Ewa Beach, the average length of the day in October is 11h and 39min.
On the first day of the month, sunrise is at 6:23 am and sunset at 6:19 pm. On the last day of October, in Ewa Beach, sunrise is at 6:34 am and sunset at 5:56 pm HST.

Sunshine

In October, the average sunshine in Ewa Beach is 8.5h.

UV index

January through May, October through December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index reading of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for the ordinary person.
Note: During October, 6 as the daily maximum UV index converts into the following advice:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. Always opt for UVA and UVB-resistant sunglasses on radiant days. Heed this! UV intensity is much stronger when reflected off sand and water.