Kailua, Big Island weather in May 2025

Expect 21°C daytime maximum temperatures in the shade with on average -9999 hours of sunshine per day in Kailua, Big Island in May. Check more long-term weather averages for Kailua, Big Island in May before you book your next holiday to Hawaii in 2025/2026.

  • 21°C maximum daytime temperature in May in Kailua, Big Island21
    21°C max day temperature
  • 15 days with some rainfall in May in Kailua, Big Island15
    15 days with some rainfall
  • 13°C minimum night-time temperature in May in Kailua, Big Island13
    13°C min night temperature
  • 13 hours of daylight per day in May in Kailua, Big Island13
    13 hours of daylight per day
  • Low heat & humidity in May in Kailua, Big IslandL
    Low heat & humidity
  • 59 mm monthly rainfall in May in Kailua, Big Island59
    59 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in May in Kailua, Big Island11
    11+ (Extreme) UV index
  • 25°C sea temperature in May in Kailua, Big Island25
    25°C sea temperature

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The May 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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How hot is it in Kailua, Big Island in May?

Daytime temperatures usually reach 21°C in Kailua, Big Island in May, falling to 13°C at night.

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

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

Does it rain in Kailua, Big Island in May?

There are usually 15 days with some rain in Kailua, Big Island in May and the average monthly rainfall is 59mm.

Kailua, Big Island May sunrise & sunset times

Browse the sunrise and sunset times for Kailua, Big Island in May 2025. 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 May 2025 05:55 18:47
Friday, 16th May 2025 05:48 18:53
Saturday, 31st May 2025 05:45 18:59

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