Kailua, Big Island weather in January 2026

Expect 20°C daytime maximum temperatures in the shade in Kailua, Big Island in January based on long-term weather averages. There is usually 13 days with some rainfall and 58 mm of average monthly rainfall in January.

  • 20°C maximum daytime temperature in January in Kailua, Big Island20
    20°C max day temperature
  • 13 days with some rainfall in January in Kailua, Big Island13
    13 days with some rainfall
  • 12°C minimum night-time temperature in January in Kailua, Big Island12
    12°C min night temperature
  • 11 hours of daylight per day in January in Kailua, Big Island11
    11 hours of daylight per day
  • Low heat & humidity in January in Kailua, Big IslandL
    Low heat & humidity
  • 58 mm monthly rainfall in January in Kailua, Big Island58
    58 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in January in Kailua, Big Island8
    8 (Very High) UV index
  • 25°C sea temperature in January in Kailua, Big Island25
    25°C sea temperature

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Kailua, Big Island by month

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The January 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)

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More about the USA

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

Daytime temperatures usually reach 20°C in Kailua, Big Island in January, falling to 12°C at night.

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

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

Does it rain in Kailua, Big Island in January?

There are usually 13 days with some rain in Kailua, Big Island in January and the average monthly rainfall is 58mm.

Kailua, Big Island January sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st January 2026 06:59 17:57
Friday, 16th January 2026 07:01 18:07
Saturday, 31st January 2026 06:59 18:16

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