Honolulu
Hawaii, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Honolulu, HI

Waikiki beach viewed from above, with clear calm waters on the foot of Honolulu city, Hawaii, with the vast cityscape and mountains in the distance
Waikiki beach viewed from above, with clear calm waters on the foot of Honolulu city, Hawaii, with the vast cityscape and mountains in the distance
December is characterized by pleasantly warm temperatures between 68°F (20°C) and 80.6°F (27°C). It is not as hot as during the summer, but it is favorable for every outdoor engagement. Rainfall rises further up to collect at an average of 1.8" (45.7mm), raining for an average of eleven days during the month. There is a slight drop in the average daily sunshine hours to eight, and the ocean temperature drops its warmth to 77°F (25°C). This is still warm for any water activities and any outdoor activities as the humidity is at pleasing 76%.

What is the temperature in December in Honolulu?

In Honolulu, Hawaii, in December, the average high-temperature is 81.1°F (27.3°C), and the average low-temperature is 68.4°F (20.2°C).

What is the average humidity in December in Honolulu?

The average relative humidity in December is 72.4%.

How much does it rain in Honolulu in December?

In Honolulu, Hawaii, in December, during 9.7 rainfall days, 10.2" (260mm) of precipitation is typically accumulated.

How warm is the water in December in Honolulu?

In Honolulu, Hawaii, in December, the average water temperature is 77°F (25°C). For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

What is the month with the shortest days in Honolulu?

December has the shortest days of the year, with an average of 10.9h of daylight.

What is the average length of the day in December in Honolulu?

The average length of the day in December in Honolulu, Hawaii, is 10.9h.

What is the month with the least sunshine in Honolulu?

The month with the least sunshine in Honolulu, Hawaii, is December, with an average of 6.4h of sunshine.

How long on average sun shines in December in Honolulu?

The average sunshine in December in Honolulu, Hawaii, is 6.4h.

When is the lowest UV index in Honolulu?

December is the month with the lowest UV index, with an average maximum UV index of 6.

What is the UV index reading in December in Honolulu?

The average daily maximum UV index in December is 6. A UV Index of 6 to 7 symbolizes a high health threat from unprotected exposure to the UV radiation.
Average temperature in December - Honolulu, HI
  • Average high temperature in December: 27.3°C

The warmest month (with the highest average high temperature) is August (31.5°C).
The month with the lowest average high temperature is January (26.7°C).

  • Average low temperature in December: 20.2°C

The month with the highest average low temperature is August (23.9°C).
The coldest month (with the lowest average low temperature) is February (18.9°C).

Average humidity in December - Honolulu, HI
  • Average humidity in December: 72.4%

The month with the highest relative humidity is January (73.3%).
The month with the lowest relative humidity is August (64.1%).

Average rainfall in December - Honolulu, HI
  • Average rainfall in December: 260mm

The wettest month (with the highest rainfall) is March (291mm).
The driest month (with the lowest rainfall) is June (158mm).

Average rainfall days in December - Honolulu, HI
  • Average rainfall days in December: 9.7 days

The month with the highest number of rainy days is December (9.7 days).
The month with the lowest number of rainy days is August (5.6 days).

Average sea temperature in December - Honolulu, HI
  • Average sea temperature in December: 25°C

The best month for swimming (with the highest average sea temperature) is September (26.9°C).
The coldest month (with the lowest average sea temperature) is March (24.3°C).

Average daylight in December / Average sunshine in December - Honolulu, HI
  • Average daylight in December: 10.9h

The month with the longest days is June (Average daylight: 13.4h).
The month with shortest days is December (Average daylight: 10.9h).

  • Average sunshine in December: 6.4h

The month with most sunshine is July (Average sunshine: 9.9h).
The month with least sunshine is December (Average sunshine: 6.4h).

Average UV index in December - Honolulu, HI
  • Average UV index in December: 6

Months with the highest UV index are June, July and August (UV index 12).
The month with the lowest UV index is December (UV index 6).