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 brings a marginal elevation to a still moderately hot 76.6°F (24.8°C) from November's 78.8°F (26°C) in Ewa Beach's average high-temperatures. Ewa Beach sees a minor drop to an average minimum temperature of 71.8°F (22.1°C) during the night in the month of December.Humidity
With an average relative humidity of 76%, December is the most humid month.Rainfall
In Ewa Beach, in December, it is raining for 14.5 days, with typically 1.38" (35mm) of accumulated precipitation. In Ewa Beach, during the entire year, the rain falls for 172.2 days and collects up to 12.72" (323mm) of precipitation.Ocean temperature
In Ewa Beach, the average seawater temperature in December is 77.4°F (25.2°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
With an average of 10h and 54min of daylight, December has the shortest days of the year.On the first day of December in Ewa Beach, sunrise is at 6:53 am and sunset at 5:49 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 6:01 pm HST.
Sunshine
The average sunshine in December is 6.8h.UV index
January through May, 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 hazard from exposure to the Sun's UV rays for average individuals.Note: The UV index of 6 during December translates into the following guidance:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Take note! Sand and water reflections strengthen the Sun's UV exposure.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Ewa Beach in December?
What is the most humid month?
What is the average humidity in December?
How much does it rain in December?
How warm is the water in December?
What is the month with the shortest days?
What is the average length of the day in December?
What time are sunrise and sunset in December?
How many hours of sunshine does Ewa Beach have in December?
What are the months with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Ewa Beach, HI
- Average high temperature in December: 76.6°F
The warmest months (with the highest average high temperature) are August and September (81.5°F).
The month with the lowest average high temperature is February (74.8°F).
- Average low temperature in December: 71.8°F
The months with the highest average low temperature are August and September (76.3°F).
The coldest month (with the lowest average low temperature) is February (69.4°F).
Average pressure in December
Ewa Beach, HI
- Average pressure in December: 29.99"Hg
The months with the highest atmospheric pressure are March and April (30.05"Hg).
The months with the lowest atmospheric pressure are September and October (29.97"Hg).
Average wind speed in December
Ewa Beach, HI
- Average wind speed in December: 10mph
The windiest month (with the highest average wind speed) is July (11.9mph).
The calmest months (with the lowest average wind speed) are January and October (9.1mph).
Average humidity in December
Ewa Beach, HI
- Average humidity in December: 76%
The month with the highest relative humidity is December (76%).
The months with the lowest relative humidity are January, April, May, June, August, September, October and November (74%).
Average rainfall in December
Ewa Beach, HI
- Average rainfall in December: 1.38"
The wettest month (with the highest rainfall) is March (1.77").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days in December
Ewa Beach, HI
- Average rainfall days in December: 14.5 days
The month with the highest number of rainy days is March (18.1 days).
The month with the least rainy days is July (11.3 days).
Average sea temperature in December
Ewa Beach, HI
- Average sea temperature in December: 77.3°F
The best month for swimming (with the highest average sea temperature) is September (80.6°F).
The coldest month (with the lowest average sea temperature) is March (75.7°F).
Average daylight in December /
Average sunshine in December
Ewa 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 5min
The month with the most sunshine is June (Average sunshine: 11h and 0min).
The month with the least sunshine is November (Average sunshine: 6h and 42min).
Average sunshine days in December
Ewa Beach, HI
- Average sunshine days in December: 10.5 days
The months with the most sunshine days are July and August (15.3 days).
The month with the least sunshine days is March (6.8 days).
Average UV index in December
Ewa Beach, HI
- Average UV index in December: 6
The months with the highest UV index are June, July, August and September (UV index 7).
The months with the lowest UV index are January, February, March, April, May, October, November and December (UV index 6).
Average cloud cover in December
Ewa Beach, HI
- Average cloud cover in December: 33
The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is September (Cloud cover 30).
Average visibility in December
Ewa 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).
Ewa Beach, Hawaii, USA
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