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 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
The transition from November to December sees average high-temperatures adjusting to a still agreeable 70.5°F (21.4°C), from a not significantly different 71.8°F (22.1°C). Captain Cook observes a minimal variance in temperature, with a consistent average low of 66.6°F (19.2°C) during the nights of December.Humidity
The average relative humidity in December in Captain Cook is 76%.Rainfall
In Captain Cook, Hawaii, during December, the rain falls for 15.6 days and regularly aggregates up to 1.3" (33mm) of precipitation. Throughout the year, in Captain Cook, there are 216.1 rainfall days, and 16.57" (421mm) of precipitation is accumulated.Daylight
With an average of 11h and 0min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 6:41 am and sunset at 5:44 pm. On the last day of December, in Captain Cook, sunrise is at 6:57 am and sunset at 5:56 pm HST.
Sunshine
The months with the least sunshine in Captain Cook are November and December, with an average of 7.3h of sunshine.UV index
The months with the lowest UV index in Captain Cook, Hawaii, are January through April, November and December, with an average maximum UV index of 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: An average maximum UV index of 5 in December leads to these recommendations:
Ensure safety - Imperative it is to shield skin and eyes from damage. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Frequently asked questions
What is the temperature in December in Captain Cook?
What is the average humidity in December in Captain Cook?
How many days does it rain in December in Captain Cook?
What is the month with the shortest days in Captain Cook?
What is the average length of the day in December in Captain Cook?
What time are sunrise and sunset in December in Captain Cook?
What are the months with the least sunshine in Captain Cook?
How many hours of sunshine does Captain Cook have in December?
What is the month with the lowest UV index in Captain Cook?
How high is the UV index in December in Captain Cook?
Average temperature in December
Captain Cook, HI
- Average high temperature in December: 70.5°F
The warmest months (with the highest average high temperature) are August and October (73.2°F).
The month with the lowest average high temperature is February (68.9°F).
- Average low temperature in December: 66.6°F
The month with the highest average low temperature is October (70°F).
The coldest month (with the lowest average low temperature) is March (64.8°F).
Average pressure in December
Captain Cook, HI
- Average pressure in December: 29.98"Hg
The month with the highest atmospheric pressure is April (30.04"Hg).
The months with the lowest atmospheric pressure are September and October (29.96"Hg).
Average wind speed in December
Captain Cook, HI
- Average wind speed in December: 5.3mph
The windiest month (with the highest average wind speed) is May (6.3mph).
The calmest month (with the lowest average wind speed) is December (5.3mph).
Average humidity in December
Captain Cook, HI
- Average humidity in December: 76%
The months with the highest relative humidity are June, July, August and September (81%).
The month with the lowest relative humidity is February (73%).
Average rainfall in December
Captain Cook, HI
- Average rainfall in December: 1.3"
The wettest month (with the highest rainfall) is September (1.81").
The driest month (with the least rainfall) is January (0.75").
Average rainfall days in December
Captain Cook, HI
- Average rainfall days in December: 15.6 days
The month with the highest number of rainy days is August (21.8 days).
The month with the least rainy days is January (10.8 days).
Average daylight in December /
Average sunshine in December
Captain Cook, HI
- Average daylight in December: 11h and 0min
The month with the longest days is June (Average daylight: 13h and 18min).
The month with the shortest days is December (Average daylight: 11h and 0min).
- Average sunshine in December: 7h and 2min
The month with the most sunshine is May (Average sunshine: 10h and 42min).
The months with the least sunshine are November and December (Average sunshine: 7h and 18min).
Average sunshine days in December
Captain Cook, HI
- Average sunshine days in December: 8.3 days
The month with the most sunshine days is January (12.7 days).
The month with the least sunshine days is May (3.2 days).
Average UV index in December
Captain Cook, HI
- Average UV index in December: 5
The months with the highest UV index are May, June, July, August, September and October (UV index 6).
The months with the lowest UV index are January, February, March, April, November and December (UV index 5).
Average cloud cover in December
Captain Cook, HI
- Average cloud cover in December: 18
The month with the most cloud cover is June (Cloud cover 31).
The month with the least cloud cover is January (Cloud cover 15).
Average visibility in December
Captain Cook, 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).
Captain Cook, Hawaii, USA
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