Kailua, Big Island weather in July 2025

Expect 23°C daytime maximum temperatures in the shade with on average -9999 hours of sunshine per day in Kailua, Big Island in July. Check more long-term weather averages for Kailua, Big Island in July before you book your next holiday to Hawaii in 2025/2026.

  • 23°C maximum daytime temperature in July in Kailua, Big Island23
    23°C max day temperature
  • 17 days with some rainfall in July in Kailua, Big Island17
    17 days with some rainfall
  • 15°C minimum night-time temperature in July in Kailua, Big Island15
    15°C min night temperature
  • 13 hours of daylight per day in July in Kailua, Big Island13
    13 hours of daylight per day
  • Moderate heat & humidity in July in Kailua, Big IslandM
    Moderate heat & humidity
  • 58 mm monthly rainfall in July in Kailua, Big Island58
    58 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in July in Kailua, Big Island11
    11+ (Extreme) UV index
  • 26°C sea temperature in July in Kailua, Big Island26
    26°C sea temperature

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The July 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 July?

Daytime temperatures usually reach 23°C in Kailua, Big Island in July, falling to 15°C at night.

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

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

Does it rain in Kailua, Big Island in July?

There are usually 17 days with some rain in Kailua, Big Island in July and the average monthly rainfall is 58mm.

Kailua, Big Island July sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Tuesday, 1st July 2025 05:49 19:07
Wednesday, 16th July 2025 05:54 19:06
Thursday, 31st July 2025 06:00 19:01

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