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
Kaaawa, Hawaii, starts December with an average high-temperature of a still moderately hot 76.1°F (24.5°C), hinting at a minimal fluctuation from November. Kaaawa's average low temperature, barely cooler than the daytime high, steadies at a pleasant 72°F (22.2°C) during December.Humidity
The months with the highest humidity are February through April, July, August, October and December, with an average relative humidity of 76%.Rainfall
In Kaaawa, in December, during 15.9 rainfall days, 1.77" (45mm) of precipitation is typically accumulated. In Kaaawa, during the entire year, the rain falls for 187.1 days and collects up to 15.83" (402mm) of precipitation.Ocean temperature
In December, the average ocean temperature is 76.5°F (24.7°C).Note: Given an individual's cold sensitivity, considering factors like sunshine, wind, and air temperature, a brief swim in 76.5°F (24.7°C) water might be pleasurable. (FYI: The standard water temperature for Olympic swimming contests is 77°F (25°C) to 82.4°F (28°C).)
Daylight
With an average of 10h and 48min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 6:53 am and sunset at 5:48 pm. On the last day of December, sunrise is at 7:09 am and sunset at 6:00 pm HST.
Sunshine
December has the least sunshine of the year, with an average of 6.3h of sunshine.UV index
The months with the lowest UV index are January through June, October through December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: In December, the average maximum UV index of 6 translates into the following recommendations:
Guard against overexposure. Protection from sun-induced harm is essential. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Attention! The combination of sand and water reflections enhances UV ray intensity.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in December?
What are the most humid months?
What is the average humidity in December?
How many days does it rain in December?
What is the ocean temperature in December?
What is the month with the shortest days?
How many hours of daylight does Kaaawa have in December?
What time are sunrise and sunset in December?
What is the month with the least sunshine?
How many hours of sunshine does Kaaawa have in December?
When is the lowest UV index in Kaaawa?
How high is the UV index in December?
Average temperature in December
Kaaawa, HI
- Average high temperature in December: 76.1°F
The warmest months (with the highest average high temperature) are August and September (81°F).
The month with the lowest average high temperature is February (74.3°F).
- Average low temperature in December: 72°F
The month with the highest average low temperature is August (76.6°F).
The coldest month (with the lowest average low temperature) is February (69.6°F).
Average pressure in December
Kaaawa, 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
Kaaawa, HI
- Average wind speed in December: 11.4mph
The windiest month (with the highest average wind speed) is July (13.5mph).
The calmest month (with the lowest average wind speed) is January (10.3mph).
Average humidity in December
Kaaawa, HI
- Average humidity in December: 76%
The months with the highest relative humidity are February, March, April, July, August, October and December (76%).
The months with the lowest relative humidity are January, May, June, September and November (75%).
Average rainfall in December
Kaaawa, HI
- Average rainfall in December: 1.77"
The wettest month (with the highest rainfall) is March (2.01").
The driest month (with the least rainfall) is July (0.71").
Average rainfall days in December
Kaaawa, HI
- Average rainfall days in December: 15.9 days
The month with the highest number of rainy days is March (18.3 days).
The month with the least rainy days is June (13.5 days).
Average sea temperature in December
Kaaawa, HI
- Average sea temperature in December: 76.5°F
The best month for swimming (with the highest average sea temperature) is September (80.1°F).
The coldest month (with the lowest average sea temperature) is March (75°F).
Average daylight in December /
Average sunshine in December
Kaaawa, 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 48min).
- Average sunshine in December: 6h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 6h and 18min).
Average sunshine days in December
Kaaawa, HI
- Average sunshine days in December: 8.2 days
The month with the most sunshine days is June (12.2 days).
The month with the least sunshine days is April (6.5 days).
Average UV index in December
Kaaawa, HI
- Average UV index in December: 6
The months with the highest UV index are July, August and September (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, October, November and December (UV index 6).
Average cloud cover in December
Kaaawa, HI
- Average cloud cover in December: 37
The month with the most cloud cover is March (Cloud cover 41).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility in December
Kaaawa, 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).
Kaaawa, Hawaii, USA
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