December weather forecastKawaihae, HI
December
Weather in December
December marks the arrival of winter with temperatures oscillating between 54.3°F (12.4°C) to 63°F (17.2°C) in Kawaihae, Hawaii. While the rainfall inches slightly higher to 3.27" (83mm) compared to November, it falls short of becoming a hindrance in outdoor activities. The daylight hours are the shortest for the year at 10.9 hours, yet they provide ample room for exploration. With the wind reaching speeds of 5mph (8km/h), the weather is comforting and welcoming. The festivities combined with this weather make December a popular choice for tourism.Temperature
Kawaihae, Hawaii, registers an average high-temperature of a still refreshing 63°F (17.2°C) with the arrival of December, showing minor deviation from the preceding month. Kawaihae's nocturnal average in December closely mirrors its daytime temperatures, settling at a cool 54.3°F (12.4°C).Humidity
In December, the average relative humidity in Kawaihae, Hawaii, is 81%.Rainfall
In Kawaihae, in December, it is raining for 20.7 days, with typically 3.27" (83mm) of accumulated precipitation. Throughout the year, in Kawaihae, Hawaii, there are 280.8 rainfall days, and 33.9" (861mm) of precipitation is accumulated.Ocean temperature
In Kawaihae, the average seawater temperature in December is 77.2°F (25.1°C).Note: Water temperatures between 77°F (25°C) and 84.2°F (29°C) are ideal for all water activities, offering enjoyment without causing discomfort over extended periods.
Daylight
December has the shortest days of the year in Kawaihae, with an average of 10h and 54min of daylight.On the first day of December in Kawaihae, sunrise is at 6:42 am and sunset at 5:42 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 5:55 pm HST.
Sunshine
The month with the least sunshine in Kawaihae, Hawaii, is December, with an average of 6.5h of sunshine.UV index
The months with the lowest UV index are January through April, November and December, with an average maximum UV index of 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the average person.Note: The daily high UV index of 4 during December translates into the following recommendations:
Exercise prevention - Precautions against solar damage are endorsed. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Kawaihae, HI
- Average high temperature in December: 63°F
The warmest month (with the highest average high temperature) is August (67.5°F).
The month with the lowest average high temperature is March (61.9°F).
- Average low temperature in December: 54.3°F
The month with the highest average low temperature is September (59°F).
The coldest month (with the lowest average low temperature) is February (52°F).
Average pressure in December
Kawaihae, 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
Kawaihae, HI
- Average wind speed in December: 5mph
The windiest months (with the highest average wind speed) are July and August (5.5mph).
The calmest months (with the lowest average wind speed) are January, May and October (4.5mph).
Average humidity in December
Kawaihae, HI
- Average humidity in December: 81%
The months with the highest relative humidity are September and October (84%).
The month with the lowest relative humidity is February (78%).
Average rainfall in December
Kawaihae, HI
- Average rainfall in December: 3.27"
The wettest month (with the highest rainfall) is August (4.13").
The driest month (with the least rainfall) is June (1.57").
Average rainfall days in December
Kawaihae, HI
- Average rainfall days in December: 20.7 days
The month with the highest number of rainy days is September (27.3 days).
The month with the least rainy days is January (17.1 days).
Average sea temperature in December
Kawaihae, HI
- Average sea temperature in December: 77.1°F
The best month for swimming (with the highest average sea temperature) is September (79.6°F).
The coldest month (with the lowest average sea temperature) is March (75.8°F).
Average daylight in December /
Average sunshine in December
Kawaihae, HI
- Average daylight in December: 10h and 54min
The month with the longest days is June (Average daylight: 13h and 18min).
The month with the shortest days is December (Average daylight: 10h and 54min).
- Average sunshine in December: 6h and 30min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 30min).
Average sunshine days in December
Kawaihae, HI
- Average sunshine days in December: 7.4 days
The month with the most sunshine days is January (9.7 days).
The month with the least sunshine days is September (0.8 days).
Average UV index in December
Kawaihae, HI
- Average UV index in December: 4
The months with the highest UV index are May, June, July, August, September and October (UV index 5).
The months with the lowest UV index are January, February, March, April, November and December (UV index 4).
Average cloud cover in December
Kawaihae, HI
- Average cloud cover in December: 36
The months with the most cloud cover are April and September (Cloud cover 43).
The month with the least cloud cover is January (Cloud cover 29).
Average visibility in December
Kawaihae, 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).
