December weather forecastKapalua, HI

December

Weather in December

December in Kapalua Hawaii brings about an overall drop in temperature, and heralds the height of the winter season. This month sees a significant increase in rainfall, jumping from 0.47" (12mm) in November to 1.02" (26mm) in December. Furthermore, the number of daylight hours reduces and sunshine duration reaches its lowest for the year. Sea temperatures also start to recede, reflecting the cooler climatic conditions. In unison with the changing climate, the wind speeds exhibit a slight increase while maintaining trails of the preceding month.

Temperature

December denotes a minimal variation in the average high-temperature to a still moderately hot 75.4°F (24.1°C) from November's 77.5°F (25.3°C). Kapalua navigates through December with a barely noticeable decrease in temperature at night, stabilizing at an agreeable 72.7°F (22.6°C).

Humidity

In Kapalua, the average relative humidity in December is 76%.

Rainfall

In Kapalua, during December, the rain falls for 10.5 days and regularly aggregates up to 1.02" (26mm) of precipitation. In Kapalua, during the entire year, the rain falls for 112.6 days and collects up to 7.91" (201mm) of precipitation.

Ocean temperature

In December, the average ocean temperature is 77°F (25°C).
Note: A water temperature from 77°F (25°C) to 84.2°F (29°C) is considered very warm and enjoyable, allowing water activities to be pleasant for extended periods without irritation.

Daylight

December has the shortest days of the year, with an average of 10h and 54min of daylight.
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, sunrise is at 7:03 am and sunset at 5:56 pm HST.

Sunshine

December has the least sunshine of the year in Kapalua, with an average of 6.7h of sunshine.

UV index

January through June, November and December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index value of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The UV index of 6 in December translates into these instructions:
Use protective steps and abide by sun safety guidelines. Safeguarding against skin and eye harm is necessary. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Caution! The mirror effect of sand and water ups the UV radiation strength.

Updated: Jun 28, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The high-temperature during December is 75.4°F (24.1°C) and the low-temperature is 72.7°F (22.6°C).

In December, the average relative humidity is 76%.

In December, the rain falls for 10.5 days. Throughout December, 1.02" (26mm) of precipitation is accumulated.

In Kapalua, in December, the average water temperature is 77°F (25°C). For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

December has the shortest days of the year, with an average of 10h and 54min of daylight.

In December, the average day length is 10h and 53min.

On the first day of December, sunrise is at 6:47 am and sunset at 5:44 pm. On the last day of the month, sunrise is at 7:03 am and sunset at 5:56 pm HST.

December has the least sunshine of the year, with an average of 6.7h of sunshine.

The average sunshine duration in December is 6.7h.

January through June, November and December, with an average maximum UV index of 6, are months with the lowest UV index.

In Kapalua, Hawaii, the average daily maximum UV index in December is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A M J J A S O N December

Nov

December

Jan

Average high temperature

77.5°F

75.4°F

74.8°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

13.1mph

12.4mph

11.2mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

7.7

10.5

9.9

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

17.4

16.8

17.9

Average UV index

Average cloud cover

29%

26%

Average visibility

6mi

Average temperature in December
Kapalua, 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
Kapalua, 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
Kapalua, 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
Kapalua, 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
Kapalua, 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
Kapalua, 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
Kapalua, HI

Average sea temperature in December: 77°F

The best months for swimming (with the highest average sea temperature) are 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
Kapalua, 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
Kapalua, 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
Kapalua, 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
Kapalua, 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
Kapalua, 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).