Kailua, Big Island weather in December 2026

Q: How hot is it in Kailua, Big Island in December?

Daytime temperatures usually reach 26°C in Kailua, Big Island in December with low heat and humidity, falling to 18°C at night.

Q: How sunny is it in Kailua, Big Island in December?

There are normally 6 hours of bright sunshine each day in Kailua, Big Island in December - that's 59% of daylight hours.

Q: How warm is the sea around Kailua, Big Island in December?

The average sea temperature around Kailua, Big Island in December is 25°C.

Q: Does it rain in Kailua, Big Island in December?

There are usually 11 days with some rain in Kailua, Big Island in December and the average monthly rainfall is 82mm.

Expect daytime maximum temperatures of 21°C in Kailua, Big Island, Hawaii in December based on long-term weather averages. There are 14 days with some rainfall and typically 40 mm of rainfall in the month.

21
21°C max day temperature
14
14 days with some rainfall
12
12°C min night temperature
11
11 hours of daylight per day
L
Low heat & humidity
40
40 mm of monthly rainfall
7
7 (High) UV index
26
26°C sea temperature

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The December weather guide for Hawaii (Kailua, Big Island) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm) | Imperial (°F / inches)

More about the USA

How hot is it in Kailua, Big Island in December?

Daytime temperatures usually reach 26°C in Kailua, Big Island in December with low heat and humidity, falling to 18°C at night.

How sunny is it in Kailua, Big Island in December?

There are normally 6 hours of bright sunshine each day in Kailua, Big Island in December - that's 59% of daylight hours.

How warm is the sea around Kailua, Big Island in December?

The average sea temperature around Kailua, Big Island in December is 25°C.

Does it rain in Kailua, Big Island in December?

There are usually 11 days with some rain in Kailua, Big Island in December and the average monthly rainfall is 82mm.

Kailua, Big Island December sunrise & sunset times

Browse the sunrise and sunset times for Kailua, Big Island in December 2026. Select a month to view Kailua, Big Island sunrise and sunset times for the next 12 months.

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