Kailua, Big Island weather in December 2025

Expect daytime maximum temperatures of 21°C in Kailua, Big Island 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°C maximum daytime temperature in December in Kailua, Big Island21
    21°C max day temperature
  • 14 days with some rainfall in December in Kailua, Big Island14
    14 days with some rainfall
  • 12°C minimum night-time temperature in December in Kailua, Big Island12
    12°C min night temperature
  • 11 hours of daylight per day in December in Kailua, Big Island11
    11 hours of daylight per day
  • Low heat & humidity in December in Kailua, Big IslandL
    Low heat & humidity
  • 40 mm monthly rainfall in December in Kailua, Big Island40
    40 mm of monthly rainfall
  • UV (maximum) index 7 (High) in December in Kailua, Big Island7
    7 (High) UV index
  • 26°C sea temperature in December in Kailua, Big Island26
    26°C sea temperature

More about Kailua, Big Island

Kailua, Big Island by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Hawaii

Marriott discount code: up to 20% off hotel stays

  • Save up to 20% when you book long stays with Marriott
  • 20% off - 4-6 nights, 15% off 3 nights
  • Book hotels in Europe, the Middle East & Africa
Show discount codeShow discount code ******UK8
Redeem Marriott discount code >>

View all Marriott offers

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)

Back to top

More about the USA

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

Daytime temperatures usually reach 21°C in Kailua, Big Island in December, falling to 12°C at night.

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

The average sea temperature around Kailua, Big Island in December is 26°C.

Does it rain in Kailua, Big Island in December?

There are usually 14 days with some rain in Kailua, Big Island in December and the average monthly rainfall is 40mm.

Kailua, Big Island December sunrise & sunset times

Browse the sunrise and sunset times for Kailua, Big Island in December 2025. Select a month to view Kailua, Big Island sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st December 2025 06:42 17:44
Tuesday, 16th December 2025 06:51 17:49
Wednesday, 31st December 2025 06:58 17:56

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^