December weather forecast
Waimea Canyon State Park, HI

Concluding the year, December in Waimea Canyon State Park, Hawaii, sees the shortest daylight hours and a significant drop in sea temperatures. The sea temperatures lower further to a cool 76.8°F (24.9°C), mimicking the conditions from the beginning of the year. The daylight hours also hit their yearly low with an average of 10.8 hours. Despite treading into a fresh new year, December weather retains its usual patterns, steering clear of extremes. Minimal daylight and cooler temperatures define the end of the year, providing a full circle to the climatological journey.

Ocean temperature

In Waimea Canyon State Park, in December, the average water temperature is 76.8°F (24.9°C).
Note: Individual preferences to cold, influenced by conditions such as sunshine, wind, and surrounding temperature, play a part in the comfort of swimming in 76.8°F (24.9°C) waters. (As an aside, Olympic swimming standards dictate water temperatures from 77°F (25°C) to 82.4°F (28°C).)

Daylight

December has the shortest days of the year, with an average of 10h and 48min of daylight.
On the first day of the month, sunrise is at 7:01 am and sunset at 5:54 pm. On the last day of December, sunrise is at 7:17 am and sunset at 6:06 pm HST.