December weather forecast
Honolulu, HI

Waikiki beach with clear calm waters on the foot of Honolulu city, Hawaii, with the vast cityscape and mountains in the distance
Waikiki beach with clear calm waters on the foot of Honolulu city, Hawaii, with the vast cityscape and mountains in the distance

Weather in December

December, the first month of the winter in Honolulu, is also a moderately hot month, with an average temperature varying between 76.5°F (24.7°C) and 71.4°F (21.9°C).

Temperature

In Honolulu, the average high-temperature in December is practically the same as in November - a still warm 76.5°F (24.7°C). In December, the average low-temperature is 71.4°F (21.9°C).

Humidity

February and December, with an average relative humidity of 76%, are the most humid months.

Rainfall

In December, the rain falls for 15.7 days. Throughout December, 1.54" (39mm) of precipitation is accumulated. Throughout the year, there are 197.2 rainfall days, and 14.61" (371mm) of precipitation is accumulated.

Ocean temperature

In Honolulu, the average water temperature is 77°F (25°C).
Note: Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

December has the shortest days of the year in Honolulu, with an average of 10h and 52min of daylight.
On the first day of December in Honolulu, sunrise is at 6:52 am and sunset at 5:48 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 6:00 pm HST.

Sunshine

The months with the least sunshine are November and December, with an average of 6.5h of sunshine.

UV index

The months with the lowest UV index are January through June, October through December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: The average daily UV index of 6 in December transform into the following instructions:
Take precautions and utilize sun safety practices. Protection against skin and eye damage is required. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.
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FAQ

What is the most humid month in Honolulu?

February and December, with an average relative humidity of 76%, are most humid months in Honolulu, Hawaii.

What is the average humidity in December in Honolulu?

In Honolulu, the average relative humidity in December is 76%.

How much does it rain in Honolulu in December?

In Honolulu, Hawaii, in December, it is raining for 15.7 days, with typically 1.54" (39mm) of accumulated precipitation.

What is the water temperature in December in Honolulu?

In Honolulu, Hawaii, the average seawater temperature in December is 77°F (25°C). Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

What is the month with the shortest days in Honolulu?

With an average of 10h and 52min of daylight, December has the shortest days of the year in Honolulu.

How many hours of daylight does Honolulu have in December?

In Honolulu, the average day length in December is 10h and 52min.

What time are sunrise and sunset in December in Honolulu?

On the first day of December, sunrise is at 6:52 am and sunset at 5:48 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 6:00 pm HST.

What is the month with the least sunshine in Honolulu?

The months with the least sunshine in Honolulu are November and December, with an average of 6.5h of sunshine.

How many hours of sunshine does Honolulu have in December?

In December, the average sunshine duration in Honolulu, Hawaii, is 6.5h.

What are the months with the lowest UV index in Honolulu?

The months with the lowest UV index are January through June, October through December, with an average maximum UV index of 6.

How high is the UV index in December in Honolulu?

In December, the average daily maximum UV index in Honolulu is 6. A UV Index estimate of 6 to 7 represents a high health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Honolulu, HI

Average temperature in December - Honolulu, HI
  • Average high temperature in December: 76.5°F

The warmest month (with the highest average high temperature) is September (81.5°F).
The months with the lowest average high temperature are February and March (75°F).

  • Average low temperature in December: 71.4°F

The month with the highest average low temperature is August (75.7°F).
The coldest month (with the lowest average low temperature) is February (69.1°F).

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Average pressure in December
Honolulu, HI

Average pressure in December - Honolulu, HI
  • Average pressure in December: 30"Hg

The month with the highest atmospheric pressure is April (30.06"Hg).
The months with the lowest atmospheric pressure are September and October (29.97"Hg).

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Average wind speed in December
Honolulu, HI

Average wind speed in December - Honolulu, HI
  • Average wind speed in December: 9.9mph

The windiest month (with the highest average wind speed) is July (12.1mph).
The calmest month (with the lowest average wind speed) is January (9mph).

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Average humidity in December
Honolulu, HI

Average humidity in December - Honolulu, HI
  • Average humidity in December: 76%

The months with the highest relative humidity are February and December (76%).
The months with the lowest relative humidity are April, May, September and November (74%).

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Average rainfall in December
Honolulu, HI

Average rainfall in December - Honolulu, HI
  • Average rainfall in December: 1.54"

The wettest months (with the highest rainfall) are March and October (1.81").
The driest month (with the least rainfall) is July (0.67").

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Average rainfall days in December
Honolulu, HI

Average rainfall days in December - Honolulu, HI
  • Average rainfall days in December: 15.7 days

The months with the highest number of rainy days are March and October (18 days).
The month with the least rainy days is January (12.6 days).

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Average sea temperature in December
Honolulu, HI

Average sea temperature in December - Honolulu, HI
  • Average sea temperature in December: 77°F

The best month for swimming (with the highest average sea temperature) is September (80.4°F).
The coldest month (with the lowest average sea temperature) is March (75.7°F).

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Average daylight in December /
Average sunshine in December
Honolulu, HI

Average daylight in December / Average sunshine in December - Honolulu, HI
  • Average daylight in December: 10h and 52min

The month with the longest days is June (Average daylight: 13h and 25min).
The month with the shortest days is December (Average daylight: 10h and 52min).

  • Average sunshine in December: 6h and 30min

The month with the most sunshine is June (Average sunshine: 10h and 48min).
The months with the least sunshine are November and December (Average sunshine: 6h and 30min).

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Average sunshine days in December
Honolulu, HI

Average sunshine days in December - Honolulu, HI
  • Average sunshine days in December: 9.6 days

The month with the most sunshine days is January (12.8 days).
The month with the least sunshine days is October (6.3 days).

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Average UV index in December
Honolulu, HI

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

The months with the highest UV index are July, August and September (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, October, November and December (UV index 6).

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Average cloud cover in December
Honolulu, HI

Average cloud cover in December - Honolulu, HI
  • Average cloud cover in December: 36

The month with the most cloud cover is March (Cloud cover 40).
The months with the least cloud cover are January and September (Cloud cover 33).

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Average visibility in December
Honolulu, HI

Average visibility in December - Honolulu, HI
  • Average visibility in December: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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