May weather forecast
Hawaii, USA

May in Hawaii truly embraces the summer spirit. Temperatures during this month hover between 70°F (21.1°C) and 84°F (28.9°C), providing warmth without overwhelming heat. The ascension in temperature from April is palpable, making May one of the preferred months for sun-seekers.

Precipitation sees a marked decrease in May, aligning with the onset of Hawaii's dry season. Even traditionally wet regions, such as Mount Waialeale on Kauai, record diminished rainfall. The showers that do occur are often brief and followed by extended sunny intervals, especially in leeward areas. Windward sides, while wetter in comparison, still witness a notable reduction in rain, allowing for more consistent outdoor activities.

Higher altitudes, including Mauna Kea and Mauna Loa, bask under clear skies, making them particularly inviting for adventurers, astronomers, and sightseers. The absence of snow and the clarity of the atmosphere render these regions perfect for stargazing and panoramic vistas.

When compared to April, May exhibits a more pronounced embrace of summer with steadily increasing temperatures and further receding rainfall. As May draws to a close, the promise of June brings with it the height of the dry season, characterized by even warmer days, minimal precipitation, and the gentle caress of the Pacific trade winds.

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• Honolulu - May »
  April, May, September and November, with an average relative humidity of 74%, are the least humid months in Honolulu. In Honolulu during May, the rain falls for 17.1 days and regularly aggregates up to 1.18" (30mm) of precipitation.
• Hilo - May »
  The months with the lowest humidity in Hilo are January, May through July, with an average relative humidity of 78%. Come May, the residents of Hilo, Hawaii, experience lesser rain showers and progressively long daylight hours.
• Kailua - May »
  An impressive 10.8 hours of sunshine render Kailua's beaches picturesque, with ample weather conditions for water sports. In Kailua in May, during 15.8 rainfall days, 0.98" (25mm) of precipitation is typically accumulated.
• Kaneohe - May »
  January, May, June, September and November, with an average relative humidity of 75%, are the least humid months in Kaneohe, Hawaii. January through June, October through December, with an average maximum UV index of 6, are months with the lowest UV index in Kaneohe.
• Kahului - May »
  In Kahului during the entire year, the rain falls for 103.4 days and collects up to 6.57" (167mm) of precipitation. January through June, November and December, with an average maximum UV index of 6, are months with the lowest UV index in Kahului, Hawaii.
• Ewa Gentry - May »
  January, April through June, August through November, with an average relative humidity of 74%, are the least humid months in Ewa Gentry. January through May, October through December, with an average maximum UV index of 6, are months with the lowest UV index in Ewa Gentry.
• Kihei - May »
  On the last day of the month, in Kihei sunrise is at 5:44 am and sunset at 7:02 pm HST. January through June, November and December, with an average maximum UV index of 6, are months with the lowest UV index in Kihei, Hawaii.
• Wahiawa - May »
  On the last day of the month, in Wahiawa, Hawaii, sunrise is at 5:49 am and sunset at 7:10 pm HST. In Wahiawa, during the entire year, the rain falls for 252.2 days and collects up to 22.09" (561mm) of precipitation.
• Schofield Barracks - May »
  On the last day of May, in Schofield Barracks, sunrise is at 5:49 am and sunset at 7:10 pm HST. By the time May comes around in Schofield Barracks, Hawaii, the scenario shifts significantly, with the lowest rainfall of the year recorded 1.9" (48mm).
• Wailuku - May »
  In Wailuku, Hawaii, in May, during 8.3 rainfall days, 0.43" (11mm) of precipitation is typically accumulated. The months with the lowest UV index in Wailuku are January through June, November and December, with an average maximum UV index of 6.