December weather forecastWaialua, HI
December
Weather in December
The first month of the winter, December, is also a moderately hot month in Waialua, Hawaii, with an average temperature fluctuating between 76.6°F (24.8°C) and 71.2°F (21.8°C).Temperature
December's advent presents an average high-temperature of a still warm 76.6°F (24.8°C), indicating a slight variation from the conditions of the previous month. Waialua's average temperature during the nights of December is recorded at an agreeable 71.2°F (21.8°C).Humidity
The months with the highest humidity are February and December, with an average relative humidity of 76%.Rainfall
In Waialua, in December, during 14.5 rainfall days, 1.06" (27mm) of precipitation is typically accumulated. In Waialua, during the entire year, the rain falls for 190.2 days and collects up to 11.65" (296mm) of precipitation.Ocean temperature
In Waialua, the average seawater temperature in December is 76.6°F (24.8°C).Note: Cold sensitivities vary, but with the right amount of sunshine, a gentle breeze, and a warm day, a swim in 76.6°F (24.8°C) waters might be just right. Remember, Olympic swimmers are used to waters between 77°F (25°C) and 82.4°F (28°C).
Daylight
With an average of 10h and 48min of daylight, December has the shortest days of the year in Waialua.On the first day of December, sunrise is at 6:54 am and sunset at 5:49 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 6:01 pm HST.
Sunshine
In December, the average sunshine is 6.3h.UV index
The months with the lowest UV index are January through June, August, October through December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the ordinary person.Note: A daily high UV index of 6 in December leads to these guidelines:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Stay sun-safe with clothing that is both closely woven and worn loosely. Note! Reflective surfaces like sand and water heighten the UV radiation levels.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Waialua, HI
- Average high temperature in December: 76.6°F
The warmest month (with the highest average high temperature) is September (81.7°F).
The month with the lowest average high temperature is February (75°F).
- Average low temperature in December: 71.2°F
The months with the highest average low temperature are August and September (75.7°F).
The coldest month (with the lowest average low temperature) is February (68.5°F).
Average pressure in December
Waialua, HI
- Average pressure in December: 30"Hg
The month with the highest atmospheric pressure is April (30.06"Hg).
The month with the lowest atmospheric pressure is October (29.97"Hg).
Average wind speed in December
Waialua, HI
- Average wind speed in December: 9.7mph
The windiest month (with the highest average wind speed) is July (11.6mph).
The calmest month (with the lowest average wind speed) is January (9mph).
Average humidity in December
Waialua, HI
- Average humidity in December: 76%
The months with the highest relative humidity are February and December (76%).
The months with the lowest relative humidity are May and September (74%).
Average rainfall in December
Waialua, HI
- Average rainfall in December: 1.06"
The wettest months (with the highest rainfall) are February and October (1.34").
The driest month (with the least rainfall) is July (0.63").
Average rainfall days in December
Waialua, HI
- Average rainfall days in December: 14.5 days
The month with the highest number of rainy days is March (17.7 days).
The month with the least rainy days is January (12.5 days).
Average sea temperature in December
Waialua, HI
- Average sea temperature in December: 76.6°F
The best month for swimming (with the highest average sea temperature) is September (80.2°F).
The coldest month (with the lowest average sea temperature) is March (75.2°F).
Average daylight in December /
Average sunshine in December
Waialua, HI
- Average daylight in December: 10h and 48min
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 18min
The month with the most sunshine is June (Average sunshine: 9h and 54min).
The month with the least sunshine is November (Average sunshine: 6h and 12min).
Average sunshine days in December
Waialua, HI
- Average sunshine days in December: 10.4 days
The month with the most sunshine days is January (12.9 days).
The month with the least sunshine days is September (6.5 days).
Average UV index in December
Waialua, HI
- Average UV index in December: 6
The months with the highest UV index are July and September (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, August, October, November and December (UV index 6).
Average cloud cover in December
Waialua, HI
- Average cloud cover in December: 40
The month with the most cloud cover is March (Cloud cover 44).
The months with the least cloud cover are January and September (Cloud cover 37).
Average visibility in December
Waialua, 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).
