Hilo, Big Island weather in October 2025

Expect 75°F daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Hilo, Big Island in October. Check more long-term weather averages for Hilo, Big Island in October before you book your next holiday to Hawaii in 2025/2026.

  • 75°F maximum daytime temperature in October in Hilo, Big Island75
    75°F max day temperature
  • 5 hours of sunshine per day
  • 15 days with some rainfall in October in Hilo, Big Island15
    15 days with some rainfall
  • 61°F minimum night-time temperature in October in Hilo, Big Island61
    61°F min night temperature
  • 12 hours of daylight per day in October in Hilo, Big Island12
    12 hours of daylight per day
  • Moderate heat & humidity in October in Hilo, Big IslandM
    Moderate heat & humidity
  • 9.8 inches monthly rainfall in October in Hilo, Big Island9.8
    9.8 inches of monthly rainfall
  • UV (maximum) index 10 (Very High) in October in Hilo, Big Island10
    10 (Very High) UV index
  • 79°F sea temperature in October in Hilo, Big Island79
    79°F sea temperature

More about Hilo, Big Island

Hilo, Big Island by month

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The October weather guide for Hawaii (Hilo, 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)  |  Imperial (°F)

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More about the USA

How hot is it in Hilo, Big Island in October?

Daytime temperatures usually reach 75°F in Hilo, Big Island in October, falling to 61°F at night.

How sunny is it in Hilo, Big Island in October?

There are normally 5 hours of bright sunshine each day in Hilo, Big Island in October - that's 39% of daylight hours.

How warm is the sea around Hilo, Big Island in October?

The average sea temperature around Hilo, Big Island in October is 79°F.

Does it rain in Hilo, Big Island in October?

There are usually 15 days with some rain in Hilo, Big Island in October and the average monthly rainfall is 9.8 inches.

Hilo, Big Island October sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Wednesday, 1st October 2025 06:11 18:08
Thursday, 16th October 2025 06:15 17:56
Friday, 31st October 2025 06:21 17:46

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