December weather forecast
Hawaii, USA

Hawaii's December is a confluence of the wet season's peak and the gentle commencement of winter. Temperatures hover in a comfortable bracket, ranging from 68°F (20°C) to 81°F (27.2°C). The days are slightly shorter, and the chill in the evening air becomes more palpable, particularly in the higher altitudes.

December witnesses substantial rainfall, with Mount Waialeale on Kauai continuing its legacy of recording impressive precipitation figures. The windward sides, already flourishing from previous months' showers, are frequently caressed by rain, especially during afternoon hours. Leeward regions, while experiencing bouts of rain, often unveil sun-dappled mornings, allowing beachgoers to soak in some warmth.

Areas of elevation, such as Mauna Kea and Mauna Loa, begin to hint at potential snowfall. The nights turn colder, with temperatures occasionally approaching freezing levels at the summits. Stargazers, while challenged by sporadic cloud covers, are treated to pristine skies on clearer nights, making December's celestial canvas a visual treat.

In comparison to November, December retains the wet trend but introduces cooler nuances to the climate palette. The Pacific hurricane season officially concludes, allowing the archipelago to focus on the evolving winter pattern. As December winds down, Hawaii stands at the cusp of a new year, ready to cycle through its diverse climatic phases once more.

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• Honolulu - December »
  The month with the shortest days in Honolulu is December, with an average of 10h and 54min of daylight. In Honolulu in December, it is raining for 15.7 days, with typically 1.54" (39mm) of accumulated precipitation.
• Hilo - December »
  In Hilo, during December, the rain falls for 18.4 days and regularly aggregates up to 2.64" (67mm) of precipitation. In Hilo, during December, the rain falls for 18.4 days and regularly aggregates up to 2.64" (67mm) of precipitation.
• Kailua - December »
  April, June through August and December, with an average relative humidity of 76%, are most humid months in Kailua, Hawaii. The month with the shortest days in Kailua is December, with an average of 10h and 54min of daylight.
• Kaneohe - December »
  The months with the highest humidity in Kaneohe are February through April, July, August, October and December, with an average relative humidity of 76%. The month with the shortest days in Kaneohe is December, with an average of 10h and 54min of daylight.
• Kahului - December »
  The month with the shortest days in Kahului is December, with an average of 10h and 54min of daylight. The month with the least sunshine in Kahului is December, with an average of 7h of sunshine.
• Ewa Gentry - December »
  The most humid month in Ewa Gentry is December, with an average relative humidity of 76%. December has the shortest days of the year in Ewa Gentry with an average of 10h and 54min of daylight.
• Kihei - December »
  December has the shortest days of the year in Kihei with an average of 10h and 54min of daylight. December in Kihei presents a mild winter weather, enjoying cooler temperatures and an increase in rainfall to 0.87" (22mm).
• Wahiawa - December »
  The month with the shortest days in Wahiawa is December, with an average of 10h and 48min of daylight. Wahiawa transitions into December recording an average high-temperature of a still moderately hot 76.5°F (24.7°C), closely aligning with the preceding month's temperature.
• Schofield Barracks - December »
  The month with the shortest days in Schofield Barracks is December, with an average of 10h and 48min of daylight. With the onset of December, Schofield Barracks's average high-temperature clocks in at a still moderately hot 78.4°F (25.8°C), showing a minor fluctuation from the previous month.
• Wailuku - December »
  In December, Wailuku transitions into cooler, wetter weather, closing the year with increased rainfall and consistently mild temperatures. January through June, November and December, with an average maximum UV index of 6, are months with the lowest UV index in Wailuku.