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
Waimanalo Beach, Hawaii, observes an average high-temperature of a still moderately hot 75.9°F (24.4°C) in December, barely different from 78.1°F (25.6°C) in November. The nights of December are characterized by an average low-temperature of 73.2°F (22.9°C), subtly descending from daytime highs.Humidity
April, June through August and December, with an average relative humidity of 76%, are the most humid months.Rainfall
In Waimanalo Beach, during December, the rain falls for 14.9 days and regularly aggregates up to 1.57" (40mm) of precipitation. Throughout the year, there are 169.9 rainfall days, and 13.15" (334mm) of precipitation is accumulated.Ocean temperature
In December, the average ocean temperature is 77°F (25°C).Note: Surface water temperatures between 77°F (25°C) and 84.2°F (29°C) offer outstanding conditions for any water activity, providing extreme pleasure for extended periods.
Daylight
December has the shortest days of the year, with an average of 10h and 54min of daylight.On the first day of the month, sunrise is at 6:52 am and sunset at 5:47 pm. On the last day of December, sunrise is at 7:08 am and sunset at 6:00 pm HST.
Sunshine
The month with the least sunshine is December, with an average of 6.6h of sunshine.UV index
January through June, November and December, with an average maximum UV index of 6, are months with the lowest UV index in Waimanalo Beach. A UV Index of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: A daily high UV index of 6 in December leads to these guidelines:
Escape overexposure. People with light skin may incur burns in fewer than 20 minutes. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Attention! UV radiation is ramped up when reflecting off sand and water surfaces.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Waimanalo Beach in December?
What are the most humid months in Waimanalo Beach?
What is the average humidity in December in Waimanalo Beach?
How many days does it rain in December in Waimanalo Beach?
How warm is the water in December in Waimanalo Beach?
What is the month with the shortest days in Waimanalo Beach?
What is the average length of the day in December in Waimanalo Beach?
When are sunrise and sunset in December in Waimanalo Beach?
What is the month with the least sunshine in Waimanalo Beach?
How many hours of sunshine does Waimanalo Beach have in December?
When is the lowest UV index in Waimanalo Beach?
What is the UV index reading in December in Waimanalo Beach?
Average temperature in December
Waimanalo Beach, HI
- Average high temperature in December: 75.9°F
The warmest month (with the highest average high temperature) is September (80.6°F).
The month with the lowest average high temperature is February (74.5°F).
- Average low temperature in December: 73.2°F
The months with the highest average low temperature are September and October (77°F).
The coldest month (with the lowest average low temperature) is February (70.5°F).
Average pressure in December
Waimanalo Beach, 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).
Average wind speed in December
Waimanalo Beach, HI
- Average wind speed in December: 12mph
The windiest month (with the highest average wind speed) is July (14.1mph).
The calmest month (with the lowest average wind speed) is January (10.7mph).
Average humidity in December
Waimanalo Beach, HI
- Average humidity in December: 76%
The months with the highest relative humidity are April, June, July, August and December (76%).
The months with the lowest relative humidity are January and November (74%).
Average rainfall in December
Waimanalo Beach, HI
- Average rainfall in December: 1.57"
The wettest month (with the highest rainfall) is March (1.69").
The driest month (with the least rainfall) is July (0.55").
Average rainfall days in December
Waimanalo Beach, HI
- Average rainfall days in December: 14.9 days
The month with the highest number of rainy days is March (16.9 days).
The month with the least rainy days is June (11.3 days).
Average sea temperature in December
Waimanalo Beach, 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).
Average daylight in December /
Average sunshine in December
Waimanalo Beach, HI
- Average daylight in December: 10h and 5min
The month with the longest days is June (Average daylight: 13h and 24min).
The month with the shortest days is December (Average daylight: 10h and 54min).
- Average sunshine in December: 6h and 4min
The month with the most sunshine is June (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).
Average sunshine days in December
Waimanalo Beach, HI
- Average sunshine days in December: 8.1 days
The month with the most sunshine days is June (13.6 days).
The months with the least sunshine days are March and November (6.6 days).
Average UV index in December
Waimanalo Beach, HI
- Average UV index in December: 6
The months with the highest UV index are July, August, September and October (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, November and December (UV index 6).
Average cloud cover in December
Waimanalo Beach, HI
- Average cloud cover in December: 32
The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is September (Cloud cover 27).
Average visibility in December
Waimanalo Beach, 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).
Waimanalo Beach, Hawaii, USA
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