The highest day temperature in December 2025 was 83°F. The lowest night temperature was 72°F. The average values for day and night temperatures during December were 79.9°F и 75.1°F respectivly.

The average sea surface temperature in December 2025 for Kailua Kona was 82.5°F. The maximum and minimum values were 81.8°F and 83.2°F respectively.

Most of the days in December are sunny but you can also expect cloudy and gloomy days.

Precipitation total in December for Kailua Kona is 0.9 in. It makes december one of the least rainy months of the year.

The average wind speed in December is 5.7 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Kailua Kona in December is 8.3 hours.