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's arrival in Waimalu, Hawaii, shows an average high-temperature of a still moderately hot 76.5°F (24.7°C), hardly different from the previous month. December in Waimalu witnesses a minor deviation from daytime peaks, with an average nighttime temperature of 70.5°F (21.4°C).Humidity
The months with the highest humidity are February and December, with an average relative humidity of 76%.Rainfall
In Waimalu, during December, the rain falls for 17 days and regularly aggregates up to 1.65" (42mm) of precipitation. Throughout the year, in Waimalu, there are 208.4 rainfall days, and 16.5" (419mm) of precipitation is accumulated.Ocean temperature
In Waimalu, the average seawater temperature in December is 77°F (25°C).Note: Water temperatures between 77°F (25°C) and 84.2°F (29°C) are regarded as highly pleasant, making all water activities enjoyable without any discomfort over long durations.
Daylight
The month with the shortest days in Waimalu is December, with an average of 10h and 54min of daylight.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
November and December, with an average of 6.3h of sunshine, are months with the least sunshine in Waimalu.UV index
January through August, October through December, with an average maximum UV index of 6, are months with the lowest UV index in Waimalu. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: The daily high UV index of 6 in December translates into this advice:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Attention! UV radiation is ramped up when reflecting off sand and water surfaces.
Frequently asked questions
What are the temperatures in Waimalu in December?
What are the most humid months in Waimalu?
What is the average humidity in December in Waimalu?
How many days does it rain in December in Waimalu?
What is the water temperature in December in Waimalu?
What is the month with the shortest days in Waimalu?
How many hours of daylight does Waimalu have in December?
When is the sunrise / sunset in December in Waimalu?
What is the month with the least sunshine in Waimalu?
How many hours of sunshine does Waimalu have in December?
When is the lowest UV index in Waimalu?
How high is the UV index in December in Waimalu?
Average temperature in December
Waimalu, HI
- Average high temperature in December: 76.5°F
The warmest months (with the highest average high temperature) are August and September (82°F).
The months with the lowest average high temperature are February and March (75.4°F).
- Average low temperature in December: 70.5°F
The month with the highest average low temperature is September (75°F).
The coldest month (with the lowest average low temperature) is February (68°F).
Average pressure in December
Waimalu, 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
Waimalu, HI
- Average wind speed in December: 9.1mph
The windiest month (with the highest average wind speed) is July (11.3mph).
The calmest month (with the lowest average wind speed) is January (8.4mph).
Average humidity in December
Waimalu, 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 April, May, June and September (74%).
Average rainfall in December
Waimalu, HI
- Average rainfall in December: 1.65"
The wettest month (with the highest rainfall) is October (2.09").
The driest month (with the least rainfall) is July (0.71").
Average rainfall days in December
Waimalu, HI
- Average rainfall days in December: 17 days
The month with the highest number of rainy days is March (20 days).
The month with the least rainy days is January (13.5 days).
Average sea temperature in December
Waimalu, HI
- Average sea temperature in December: 77°F
The best months for swimming (with the highest average sea temperature) are August, September and October (81°F).
The coldest months (with the lowest average sea temperature) are January, February, March and April (75°F).
Average daylight in December /
Average sunshine in December
Waimalu, 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 2min
The month with the most sunshine is June (Average sunshine: 9h and 54min).
The months with the least sunshine are November and December (Average sunshine: 6h and 18min).
Average sunshine days in December
Waimalu, HI
- Average sunshine days in December: 9.2 days
The month with the most sunshine days is January (12.3 days).
The month with the least sunshine days is November (6.2 days).
Average UV index in December
Waimalu, HI
- Average UV index in December: 6
The month with the highest UV index is September (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, October, November and December (UV index 6).
Average cloud cover in December
Waimalu, HI
- Average cloud cover in December: 40
The month with the most cloud cover is March (Cloud cover 44).
The month with the least cloud cover is January (Cloud cover 36).
Average visibility in December
Waimalu, 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).
Waimalu, Hawaii, USA
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