December weather forecast and climate
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 average temperature fluctuating between 71.4°F (21.9°C) and 76.5°F (24.7°C).

Temperature

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

Humidity

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

Rainfall

In Honolulu, in December, during 15.7 rainfall days, 1.54" (39mm) of precipitation is typically accumulated. In Honolulu, Hawaii, during the entire year, the rain falls for 197.2 days and collects up to 14.61" (371mm) of precipitation.

Ocean temperature

In December, the average ocean 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

With an average of 10.9h of daylight, December has the shortest days of the year in Honolulu.

Sunshine

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

UV index

Months with the lowest UV index are January through June, October through December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to the UV radiation for ordinary individuals.
Note: In December, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.
[Resources]

FAQ

What is the temperature in December in Honolulu?

In December, the average high-temperature is 76.5°F (24.7°C), and the average low-temperature is 71.4°F (21.9°C).

What is the most humid month in Honolulu?

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

What is the average humidity in December in Honolulu?

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

How much does it rain in Honolulu in December?

In Honolulu, during December, the rain falls for 15.7 days and regularly aggregates up to 1.54" (39mm) of precipitation.

How warm is the water in December in Honolulu?

In December, the average ocean temperature in Honolulu, Hawaii, 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 10.9h of daylight, December has the shortest days of the year in Honolulu, Hawaii.

How many hours of daylight does Honolulu have in December?

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

What is the month with the least sunshine in Honolulu?

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

How many hours of sunshine does Honolulu have in December?

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

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

Months with the lowest UV index in Honolulu are January through June, October through December, with an average maximum UV index of 6.

What is the UV index intensity in December in Honolulu?

The average daily maximum UV index in December is 6. A UV Index value of 6 to 7 symbolizes a high health threat from unsafe exposure to the Sun's UV rays.

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).
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).

[Resources]

Average pressure in December
Honolulu, HI

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

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

[Resources]

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).

[Resources]

Average humidity in December
Honolulu, HI

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

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

[Resources]

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").

[Resources]

Average rainfall days in December
Honolulu, HI

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

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).

[Resources]

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).

[Resources]

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

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 the shortest days is December (Average daylight: 10.9h).

  • Average sunshine in December: 6.5h

The month with the most sunshine is June (Average sunshine: 10.8h).
Months with the least sunshine are November and December (Average sunshine: 6.5).

[Resources]

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).

[Resources]

Average UV index in December
Honolulu, HI

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

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

[Resources]

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).
Months with the least cloud cover are January and September (Cloud cover 33).

[Resources]

Average visibility in December
Honolulu, HI

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

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

[Resources]