October weather forecast
Halawa, HI

In October, a downward shift in the upper limit of temperature signals a cooling trend in Halawa. A significant rise in rainfall to 3.7" (94mm) denotes preparations for the wetter months ahead. The UV index and daylight duration continue on their receding trajectory. However, an uptick in sunshine hours contrasts this trend. Meanwhile, the sea retains its warm allure, extending beach days well into autumn.

Temperature

July through October mark Halawa's peak of temperatures, averaging a high-temperature of 82.4°F (28°C).

Rainfall

In Halawa, during October, the rain falls for 9 days and regularly aggregates up to 3.74" (95mm) of precipitation. In Halawa, during the entire year, the rain falls for 116 days and collects up to 54.96" (1396mm) of precipitation.

Ocean temperature

In Halawa, Hawaii, the average seawater temperature in October is 78.8°F (26°C).
Note: In any water activity, temperatures between 77°F (25°C) and 84.2°F (29°C) are viewed as magnificent and exceptionally pleasant for prolonged enjoyment.

Daylight

The average length of the day in October is 11h and 39min.
On the first day of October, sunrise is at 6:18 am and sunset at 6:14 pm. On the last day of the month, sunrise is at 6:29 am and sunset at 5:51 pm HST.

Sunshine

The average sunshine in October is 8h.

UV index

The average daily maximum UV index in October is 9. A UV Index reading of 8 to 10 represents a very high health hazard from exposure to the Sun's UV rays for the average person.
Note: The UV index of 9 during October translates into the following guidance:
Prioritize protection; rapid damage can occur to unprotected eyes and skin. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Despite the overcast weather, sunscreen with SPF of at least 30 should be applied liberally and reapplied often, particularly after swimming or an outdoor workout. Take caution! The UV rays from the Sun gain strength from sand and water reflections.