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
The transition from November to December sees average high-temperatures adjusting to a still warm 75.9°F (24.4°C), from a not significantly different 78.1°F (25.6°C). The low temperature average during December reflects a slight decrease to an agreeable 73.2°F (22.9°C) from the day's peak.Humidity
April, June through August and December, with an average relative humidity of 76%, are the most humid months.Rainfall
In Waimanalo, in December, it is raining for 14.9 days, with typically 1.57" (40mm) of accumulated precipitation. Throughout the year, there are 169.9 rainfall days, and 13.15" (334mm) of precipitation is accumulated.Daylight
December has the shortest days of the year in Waimanalo, with an average of 10h and 54min of daylight.On the first day of December in Waimanalo, sunrise is at 6:52 am and sunset at 5:47 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 6:00 pm HST.
Sunshine
The month with the least sunshine in Waimanalo is December, with an average of 6.6h of sunshine.UV index
The months with the lowest UV index are January through June, November and December, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index of 6 in December converts into the following recommendations:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Frequently asked questions
What is the usual temperature for Waimanalo in December?
What is the most humid month in Waimanalo?
What is the average humidity in December in Waimanalo?
How many days does it rain in December in Waimanalo?
What is the month with the shortest days in Waimanalo?
What is the average length of the day in December in Waimanalo?
When are sunrise and sunset in December in Waimanalo?
What is the month with the least sunshine in Waimanalo?
How long on average sun shines in December in Waimanalo?
What are the months with the lowest UV index in Waimanalo?
How high is the UV index in December in Waimanalo?
Average temperature in December
Waimanalo, HI
- Average high temperature in December: 75.9°F
The warmest month (with the highest average high temperature) is September (80.6°F).
The month with the lowest average high temperature is February (74.5°F).
- Average low temperature in December: 73.2°F
The months with the highest average low temperature are September and October (77°F).
The coldest month (with the lowest average low temperature) is February (70.5°F).
Average pressure in December
Waimanalo, 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
Waimanalo, HI
- Average wind speed in December: 12mph
The windiest month (with the highest average wind speed) is July (14.1mph).
The calmest month (with the lowest average wind speed) is January (10.7mph).
Average humidity in December
Waimanalo, HI
- Average humidity in December: 76%
The months with the highest relative humidity are April, June, July, August and December (76%).
The months with the lowest relative humidity are January and November (74%).
Average rainfall in December
Waimanalo, HI
- Average rainfall in December: 1.57"
The wettest month (with the highest rainfall) is March (1.69").
The driest month (with the least rainfall) is July (0.55").
Average rainfall days in December
Waimanalo, HI
- Average rainfall days in December: 14.9 days
The month with the highest number of rainy days is March (16.9 days).
The month with the least rainy days is June (11.3 days).
Average daylight in December /
Average sunshine in December
Waimanalo, 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 4min
The month with the most sunshine is June (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).
Average sunshine days in December
Waimanalo, HI
- Average sunshine days in December: 8.1 days
The month with the most sunshine days is June (13.6 days).
The months with the least sunshine days are March and November (6.6 days).
Average UV index in December
Waimanalo, HI
- Average UV index in December: 6
The months with the highest UV index are July, August, September and October (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, November and December (UV index 6).
Average cloud cover in December
Waimanalo, HI
- Average cloud cover in December: 32
The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is September (Cloud cover 27).
Average visibility in December
Waimanalo, 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).
Waimanalo, Hawaii, USA
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