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 »
  Honolulu ushers in October with an average high-temperature of a still warm 81°F (27.2°C), showing a close resemblance to the previous month. On the first day of October in Honolulu, sunrise is at 6:22 am and sunset at 6:18 pm.
• Hilo - October »
  In Hilo during October, the rain falls for 20.1 days and regularly aggregates up to 2.8" (71mm) of precipitation. In Hilo, during October, the rain falls for 20.1 days and regularly aggregates up to 2.8" (71mm) of precipitation.
• Kailua - October »
  In Kailua in October, during 16.5 rainfall days, 1.46" (37mm) of precipitation is typically accumulated. In Kailua in October, during 16.5 rainfall days, 1.46" (37mm) of precipitation is typically accumulated.
• Kaneohe - October »
  The months with the highest humidity in Kaneohe are February through April, July, August, October and December, with an average relative humidity of 76%. January through June, October through December, with an average maximum UV index of 6, are months with the lowest UV index in Kaneohe.
• Kahului - October »
  In Kahului, Hawaii, during October, the rain falls for 9 days and regularly aggregates up to 0.55" (14mm) of precipitation. In Kahului in October, the average water temperature is 79.3°F (26.3°C).
• Ewa Gentry - October »
  In Ewa Gentry, during October, the rain falls for 15.7 days and regularly aggregates up to 1.42" (36mm) of precipitation. On the last day of October, in Ewa Gentry sunrise is at 6:35 am and sunset at 5:56 pm HST.
• Kihei - October »
  On the first day of October in Kihei sunrise is at 6:17 am and sunset at 6:13 pm. On the last day of October, in Kihei sunrise is at 6:28 am and sunset at 5:50 pm HST.
• 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 in October, it is raining for 22.1 days, with typically 2.6" (66mm) of accumulated precipitation.
• Schofield Barracks - October »
  On the first day of October in Schofield Barracks sunrise is at 6:23 am and sunset at 6:19 pm. On the last day of October, in Schofield Barracks, sunrise is at 6:35 am and sunset at 5:56 pm HST.
• Wailuku - October »
  On the first day of October in Wailuku, Hawaii, sunrise is at 6:17 am and sunset at 6:13 pm. July through October, with an average maximum UV index of 7, are months with the highest UV index in Wailuku, Hawaii.