December weather forecastKaanapali, HI
December
Weather in December
Ending the year with the coolest temperatures, December witnesses reduced sea temperature of 77.2°F (25.1°C). This month experiences a resurgence in rainfall with 1.02" (26mm) received over 10.5 days, indicating a slight increase from November. Despite being the month with the shortest day length of 10.9 hours, daylight is still plentiful. Wrapping up the year, December proffers a mild, pleasant climate in Kaanapali.Temperature
On the advent of December, Kaanapali's average high-temperature exhibits a minor adjustment to a still moderately hot 75.4°F (24.1°C) from November's 77.5°F (25.3°C). A modest dip in temperatures to an average of 72.7°F (22.6°C) is observed throughout Kaanapali's December nights.Humidity
In Kaanapali, the average relative humidity in December is 76%.Rainfall
In Kaanapali, during December, the rain falls for 10.5 days and regularly aggregates up to 1.02" (26mm) of precipitation. Throughout the year, there are 112.6 rainfall days, and 7.91" (201mm) of precipitation is accumulated.Ocean temperature
In Kaanapali, the average seawater temperature in December is 77.2°F (25.1°C).Note: Swimming, diving, and similar water activities in temperatures ranging from 77°F (25°C) to 84.2°F (29°C) are seen as very agreeable and pleasurable for lengthy periods without discomfort.
Daylight
With an average of 10h and 54min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 6:47 am and sunset at 5:44 pm. On the last day of December, in Kaanapali, sunrise is at 7:03 am and sunset at 5:56 pm HST.
Sunshine
The month with the least sunshine is December, with an average of 6.7h 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 value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum UV index of 6 during December translates into these guidelines:
Skirt overexposure. People with light complexions might get scorched in under 20 minutes. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide 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. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Kaanapali, HI
- Average high temperature in December: 75.4°F
The warmest month (with the highest average high temperature) is September (79.7°F).
The month with the lowest average high temperature is February (73.9°F).
- Average low temperature in December: 72.7°F
The months with the highest average low temperature are August and October (76.5°F).
The coldest month (with the lowest average low temperature) is March (70.7°F).
Average pressure in December
Kaanapali, 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
Kaanapali, HI
- Average wind speed in December: 11.9mph
The windiest month (with the highest average wind speed) is July (13.9mph).
The calmest month (with the lowest average wind speed) is January (10.6mph).
Average humidity in December
Kaanapali, HI
- Average humidity in December: 76%
The month with the highest relative humidity is July (77%).
The months with the lowest relative humidity are January, February, March, September and November (75%).
Average rainfall in December
Kaanapali, HI
- Average rainfall in December: 1.02"
The wettest month (with the highest rainfall) is March (1.1").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in December
Kaanapali, HI
- Average rainfall days in December: 10.5 days
The month with the highest number of rainy days is March (13.4 days).
The month with the least rainy days is November (7.7 days).
Average sea temperature in December
Kaanapali, HI
- Average sea temperature in December: 77.2°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 (76°F).
Average daylight in December /
Average sunshine in December
Kaanapali, HI
- Average daylight in December: 10h and 54min
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 42min
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 42min).
Average sunshine days in December
Kaanapali, HI
- Average sunshine days in December: 16.8 days
The month with the most sunshine days is October (18.4 days).
The month with the least sunshine days is March (12.6 days).
Average UV index in December
Kaanapali, 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
Kaanapali, HI
- Average cloud cover in December: 29
The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is September (Cloud cover 25).
Average visibility in December
Kaanapali, 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).
