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

Temperatures reach their maximum during July through October, recording an average high-temperature of 82.4°F (28°C).

Rainfall

In Halawa, in October, it is raining for 9 days, with typically 3.74" (95mm) of accumulated precipitation. Throughout the year, in Halawa, there are 116 rainfall days, and 54.96" (1396mm) of precipitation is accumulated.

Ocean temperature

In October, the average ocean temperature in Halawa is 78.8°F (26°C).
Note: Water activities in temperatures ranging from 77°F (25°C) to 84.2°F (29°C) are pleasurable, without feeling uncomfortable even during extended periods.

Daylight

The average length of the day in October is 11h and 39min.
On the first day of the month, sunrise is at 6:18 am and sunset at 6:14 pm. On the last day of October, 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 vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: The daily high UV index of 9 during October translates into the following recommendations:
Protection should always be a priority. Skin and eyes are vulnerable without it. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Sunscreen of at least SPF 30 should be applied generously and reapplied often on overcast days, especially post swim or outdoor exercise. Note! Reflective surfaces like sand and water heighten the UV radiation levels.