October weather forecast
Hawaii, USA

October in Hawaii marks a distinct shift towards the wet season. Temperatures begin their descent from summer highs, settling between 72°F (22.2°C) and 85°F (29.4°C). This drop in temperature is accompanied by a rise in humidity, adding a moist texture to the air.

Rainfall becomes more pronounced in October. Mount Waialeale on Kauai, known for its significant annual precipitation, begins accumulating rain at a quicker pace. The windward regions, draped in lush greenery, get bathed in consistent showers, replenishing streams and waterfalls. In contrast, leeward areas, despite seeing an increase in rainfall, manage to retain pockets of sunshine, particularly during mornings and early afternoons.

High-altitude locales, like Mauna Kea and Mauna Loa, while mostly clear, can occasionally witness cloud build-ups, slightly obscuring the otherwise perfect stargazing conditions. However, on clearer nights, the cooler temperatures make astronomical observations a delight.

Comparatively, October is wetter and cooler than September. The Pacific hurricane season, though on its last leg, can still bring forth occasional storm systems. October's shifting weather patterns act as a precursor to November, traditionally one of Hawaii's wetter months, wherein the islands brace for more consistent rains and the gradual onset of winter temperatures.

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• Honolulu - October »
  January through June, October through December, with an average maximum UV index of 6, are months with the lowest UV index in Honolulu, Hawaii. In October, the average ocean temperature in Honolulu, Hawaii, is 80.1°F (26.7°C).
• Hilo - October »
  Hilo encounters an average temperature dip to a pleasant 69.6°F (20.9°C) throughout October, subtly lower than its daytime maximum. On the first day of October in Hilo, sunrise is at 6:11 am and sunset at 6:08 pm.
• Kailua - October »
  October's weather in Kailua signifies an oncoming autumn season with a slight drop in temperature and augmented precipitation. In Kailua in October, during 16.5 rainfall days, 1.46" (37mm) of precipitation is typically accumulated.
• Kaneohe - October »
  February through April, July, August, October and December, with an average relative humidity of 76%, are most humid months in Kaneohe, Hawaii. The months with the highest humidity in Kaneohe are February through April, July, August, October and December, with an average relative humidity of 76%.
• Kahului - October »
  Kahului experiences a subtle adjustment in high-temperatures to a still warm 79.3°F (26.3°C) with the onset of October, maintaining near parity with September's 79.9°F (26.6°C). In Kahului in October, during 9 rainfall days, 0.55" (14mm) of precipitation is typically accumulated.
• Ewa Gentry - October »
  In Ewa Gentry in October, during 15.7 rainfall days, 1.42" (36mm) of precipitation is typically accumulated. In Ewa Gentry, in October, during 15.7 rainfall days, 1.42" (36mm) of precipitation is typically accumulated.
• Kihei - October »
  In Kihei in October, the average water temperature is 79.3°F (26.3°C). July through October, with an average maximum UV index of 7, are months with the highest UV index in Kihei, Hawaii.
• Wahiawa - October »
  The month with the most rainfall in Wahiawa is October, when the rain falls for 22.1 days and typically aggregates up to 2.6" (66mm) of precipitation. In Wahiawa, Hawaii, in October, it is raining for 22.1 days, with typically 2.6" (66mm) of accumulated precipitation.
• Schofield Barracks - October »
  What time are sunrise and sunset in October in Schofield Barracks? Schofield Barracks experiences a recorded average high-temperature of a warm 84.7°F (29.3°C) in October, closely aligned with September's 87.1°F (30.6°C).
• Wailuku - October »
  October in Wailuku brings another month of consistent temperatures and a slight rise in the rainfall gauge. In Wailuku, in October, it is raining for 9 days, with typically 0.55" (14mm) of accumulated precipitation.