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 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
With the onset of December, the average high-temperature registers at a still agreeable 71.6°F (22°C), subtly different from November's 72.9°F (22.7°C). In Hakalau, the month of December brings a consistent average low-temperature of 66.4°F (19.1°C), slightly cooler than its daytime highs.Humidity
In Hakalau, the average relative humidity in December is 79%.Rainfall
In Hakalau, in December, during 18.4 rainfall days, 2.64" (67mm) of precipitation is typically accumulated. In Hakalau, Hawaii, during the entire year, the rain falls for 227.7 days and collects up to 27.83" (707mm) of precipitation.Daylight
December has the shortest days of the year, with an average of 11h and 0min of daylight.On the first day of December in Hakalau, sunrise is at 6:39 am and sunset at 5:40 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 5:52 pm HST.
Sunshine
The month with the least sunshine is December, with an average of 6.5h of sunshine.UV index
May through December, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for average individuals.Note: A maximum daily UV index of 6 during December morphs into the following directions:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Frequently asked questions
What is the temperature in December in Hakalau?
What is the average humidity in December in Hakalau?
How much does it rain in Hakalau in December?
What is the month with the shortest days in Hakalau?
What is the average length of the day in December in Hakalau?
When is the sunrise / sunset in December in Hakalau?
What is the month with the least sunshine in Hakalau?
How long on average sun shines in December in Hakalau?
When is the highest UV index in Hakalau?
What is the UV index reading in December in Hakalau?
Average temperature in December
Hakalau, HI
- Average high temperature in December: 71.6°F
The warmest month (with the highest average high temperature) is August (75.4°F).
The month with the lowest average high temperature is March (69.6°F).
- Average low temperature in December: 66.4°F
The month with the highest average low temperature is September (70°F).
The coldest month (with the lowest average low temperature) is March (64°F).
Average pressure in December
Hakalau, HI
- Average pressure in December: 29.99"Hg
The month with the highest atmospheric pressure is April (30.05"Hg).
The months with the lowest atmospheric pressure are September and October (29.97"Hg).
Average wind speed in December
Hakalau, HI
- Average wind speed in December: 6.9mph
The windiest month (with the highest average wind speed) is August (7.6mph).
The calmest month (with the lowest average wind speed) is October (6.7mph).
Average humidity in December
Hakalau, HI
- Average humidity in December: 79%
The month with the highest relative humidity is March (80%).
The months with the lowest relative humidity are January, May, June and July (78%).
Average rainfall in December
Hakalau, HI
- Average rainfall in December: 2.64"
The wettest month (with the highest rainfall) is February (3.78").
The driest month (with the least rainfall) is June (1.1").
Average rainfall days in December
Hakalau, HI
- Average rainfall days in December: 18.4 days
The month with the highest number of rainy days is March (22.9 days).
The month with the least rainy days is January (13.3 days).
Average daylight in December /
Average sunshine in December
Hakalau, HI
- Average daylight in December: 11h and 0min
The month with the longest days is June (Average daylight: 13h and 18min).
The month with the shortest days is December (Average daylight: 11h and 0min).
- Average sunshine in December: 6h and 3min
The month with the most sunshine is June (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 30min).
Average sunshine days in December
Hakalau, HI
- Average sunshine days in December: 6.2 days
The month with the most sunshine days is January (12.1 days).
The month with the least sunshine days is August (1.8 days).
Average UV index in December
Hakalau, HI
- Average UV index in December: 6
The months with the highest UV index are May, June, July, August, September, October, November and December (UV index 6).
The months with the lowest UV index are January, February, March and April (UV index 5).
Average cloud cover in December
Hakalau, HI
- Average cloud cover in December: 33
The month with the most cloud cover is March (Cloud cover 42).
The month with the least cloud cover is January (Cloud cover 26).
Average visibility in December
Hakalau, 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).
Hakalau, Hawaii, USA
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