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
Kapaau's December showcases an average high-temperature of a still enjoyable 63°F (17.2°C), hardly distinct from November's 63.5°F (17.5°C). Kapaau's nighttime temperature in December consistently rests at a cool 54.3°F (12.4°C).Humidity
The average relative humidity in December is 81%.Rainfall
In Kapaau, in December, it is raining for 20.7 days, with typically 3.27" (83mm) of accumulated precipitation. In Kapaau, during the entire year, the rain falls for 280.8 days and collects up to 33.9" (861mm) of precipitation.Daylight
With an average of 10h and 54min of daylight, December has the shortest days of the year in Kapaau.On the first day of the month, sunrise is at 6:42 am and sunset at 5:42 pm. On the last day of December, in Kapaau, sunrise is at 6:58 am and sunset at 5:54 pm HST.
Sunshine
December has the least sunshine of the year, with an average of 6.5h of sunshine.UV index
January through April, November and December, with an average maximum UV index of 4, are months with the lowest UV index. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: In December, the average maximum UV index of 4 translates into the following recommendations:
Make use of precautions - It is urged to ward off sun damage. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Frequently asked questions
What are December temperatures in Kapaau?
What is the average humidity in December in Kapaau?
How much does it rain in Kapaau in December?
What is the month with the shortest days in Kapaau?
How many hours of daylight does Kapaau have in December?
When are sunrise and sunset in December in Kapaau?
What is the month with the least sunshine in Kapaau?
How long on average sun shines in December in Kapaau?
What are the months with the lowest UV index in Kapaau?
What is the UV index reading in December in Kapaau?
Average temperature in December
Kapaau, HI
- Average high temperature in December: 63°F
The warmest month (with the highest average high temperature) is August (67.5°F).
The month with the lowest average high temperature is March (61.9°F).
- Average low temperature in December: 54.3°F
The month with the highest average low temperature is September (59°F).
The coldest month (with the lowest average low temperature) is February (52°F).
Average pressure in December
Kapaau, HI
- Average pressure in December: 29.99"Hg
The month with the highest atmospheric pressure is April (30.05"Hg).
The months with the lowest atmospheric pressure are September and October (29.97"Hg).
Average wind speed in December
Kapaau, HI
- Average wind speed in December: 5mph
The windiest months (with the highest average wind speed) are July and August (5.5mph).
The calmest months (with the lowest average wind speed) are January, May and October (4.5mph).
Average humidity in December
Kapaau, HI
- Average humidity in December: 81%
The months with the highest relative humidity are September and October (84%).
The month with the lowest relative humidity is February (78%).
Average rainfall in December
Kapaau, HI
- Average rainfall in December: 3.27"
The wettest month (with the highest rainfall) is August (4.13").
The driest month (with the least rainfall) is June (1.57").
Average rainfall days in December
Kapaau, HI
- Average rainfall days in December: 20.7 days
The month with the highest number of rainy days is September (27.3 days).
The month with the least rainy days is January (17.1 days).
Average daylight in December /
Average sunshine in December
Kapaau, HI
- Average daylight in December: 10h and 5min
The month with the longest days is June (Average daylight: 13h and 18min).
The month with the shortest days is December (Average daylight: 10h and 54min).
- Average sunshine in December: 6h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 30min).
Average sunshine days in December
Kapaau, HI
- Average sunshine days in December: 7.4 days
The month with the most sunshine days is January (9.7 days).
The month with the least sunshine days is September (0.8 days).
Average UV index in December
Kapaau, HI
- Average UV index in December: 4
The months with the highest UV index are May, June, July, August, September and October (UV index 5).
The months with the lowest UV index are January, February, March, April, November and December (UV index 4).
Average cloud cover in December
Kapaau, HI
- Average cloud cover in December: 36
The months with the most cloud cover are April and September (Cloud cover 43).
The month with the least cloud cover is January (Cloud cover 29).
Average visibility in December
Kapaau, 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).
Kapaau, Hawaii, USA
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