Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average sea temperature in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
December's weather in Kapaa records an average high-temperature of a still warm 75.4°F (24.1°C), showing little deviation from November. During the December nights, Kapaa's temperature maintains an average close to the daytime highs, settling at an agreeable 71.8°F (22.1°C).Humidity
June through August, October and December, with an average relative humidity of 77%, are the most humid months in Kapaa.Rainfall
In Kapaa, in December, it is raining for 18.1 days, with typically 2.2" (56mm) of accumulated precipitation. Throughout the year, in Kapaa, there are 218.4 rainfall days, and 22.13" (562mm) of precipitation is accumulated.Ocean temperature
In December, the average ocean temperature in Kapaa is 76.6°F (24.8°C).Note: Your comfort in 76.6°F (24.8°C) waters hinges on your relationship with the cold, today's sunny disposition, wind patterns, and the air's temperature. For context, Olympic swimmers are no strangers to waters of 77°F (25°C) to 82.4°F (28°C).
Daylight
The month with the shortest days in Kapaa is December, with an average of 10h and 48min of daylight.On the first day of the month, sunrise is at 7:00 am and sunset at 5:53 pm. On the last day of December, sunrise is at 7:16 am and sunset at 6:05 pm HST.
Sunshine
In Kapaa, Hawaii, the average sunshine in December is 6.4h.UV index
January through August, October through December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for average individuals.Note: In December, the maximum UV index of 6 translates into these guidelines:
Stay clear of intense sun exposure. Solar protection is of utmost significance. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Take note! The UV strength of the Sun elevates when reflected off water and sand.
Frequently asked questions
What is the average December temperature in Kapaa?
What are the most humid months in Kapaa?
What is the average humidity in December in Kapaa?
How many days does it rain in December in Kapaa?
What is the water temperature in December in Kapaa?
What is the month with the shortest days in Kapaa?
How many hours of daylight does Kapaa have in December?
When are sunrise and sunset in December in Kapaa?
How many hours of sunshine does Kapaa have in December?
When is the lowest UV index in Kapaa?
How high is the UV index in December in Kapaa?
Average temperature in December
Kapaa, HI
- Average high temperature in December: 75.4°F
The warmest month (with the highest average high temperature) is September (79.7°F).
The months with the lowest average high temperature are February and March (73.2°F).
- Average low temperature in December: 71.8°F
The month with the highest average low temperature is September (75.9°F).
The coldest month (with the lowest average low temperature) is February (68.5°F).
Average pressure in December
Kapaa, HI
- Average pressure in December: 30.01"Hg
The month with the highest atmospheric pressure is April (30.07"Hg).
The months with the lowest atmospheric pressure are September and October (29.98"Hg).
Average wind speed in December
Kapaa, HI
- Average wind speed in December: 11.2mph
The windiest month (with the highest average wind speed) is July (12.3mph).
The calmest month (with the lowest average wind speed) is January (10mph).
Average humidity in December
Kapaa, HI
- Average humidity in December: 77%
The months with the highest relative humidity are June, July, August, October and December (77%).
The month with the lowest relative humidity is January (75%).
Average rainfall in December
Kapaa, HI
- Average rainfall in December: 2.2"
The wettest month (with the highest rainfall) is March (2.52").
The driest month (with the least rainfall) is April (1.3").
Average rainfall days in December
Kapaa, HI
- Average rainfall days in December: 18.1 days
The month with the highest number of rainy days is August (21.1 days).
The month with the least rainy days is January (12.5 days).
Average sea temperature in December
Kapaa, HI
- Average sea temperature in December: 76.6°F
The best month for swimming (with the highest average sea temperature) is September (80.2°F).
The coldest month (with the lowest average sea temperature) is March (74.8°F).
Average daylight in December /
Average sunshine in December
Kapaa, HI
- Average daylight in December: 10h and 5min
The month with the longest days is June (Average daylight: 13h and 30min).
The month with the shortest days is December (Average daylight: 10h and 48min).
- Average sunshine in December: 6h and 2min
The month with the most sunshine is June (Average sunshine: 9h and 42min).
The month with the least sunshine is November (Average sunshine: 6h and 12min).
Average sunshine days in December
Kapaa, HI
- Average sunshine days in December: 6.7 days
The month with the most sunshine days is January (12.8 days).
The month with the least sunshine days is August (2.9 days).
Average UV index in December
Kapaa, HI
- Average UV index in December: 6
The month with the highest UV index is September (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, October, November and December (UV index 6).
Average cloud cover in December
Kapaa, HI
- Average cloud cover in December: 42
The month with the most cloud cover is March (Cloud cover 47).
The months with the least cloud cover are January and September (Cloud cover 38).
Average visibility in December
Kapaa, 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).
Kapaa, Hawaii, USA
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