December weather forecastLahaina, HI
December
Weather in December
December in Lahaina is characterized by a significant shift in the weather. Temperatures drop further, making the weather a tad cooler. Rainfall replicates a yearly cycle by rising up to 1.02" (26mm), signifying a return to damp conditions. It is rifled with challenges for sunseekers as dwindling sunshine hours hint at an approaching winter. December marks the end of Lahaina's weather cycle with a noticeable change in its mood and display.Temperature
The shift to December signals an average high-temperature of a still moderately hot 75.4°F (24.1°C), subtly varied from November's 77.5°F (25.3°C). The month of December shows a minor drop from daytime temperatures, generally recording a low average of 72.7°F (22.6°C).Humidity
The average relative humidity in December in Lahaina is 76%.Rainfall
In December, the rain falls for 10.5 days. Throughout December, 1.02" (26mm) of precipitation is accumulated. In Lahaina, 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 77.2°F (25.1°C).Note: Swimming, diving, and other water activities in temperatures ranging from 77°F (25°C) to 84.2°F (29°C) are highly enjoyable and provide prolonged comfort without unease.
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, sunrise is at 7:03 am and sunset at 5:56 pm HST.
Sunshine
December has the least sunshine of the year in Lahaina, 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 estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 6 during December leads to these advisories:
Resist extreme sun exposure. Guarding against solar damage is essential. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Take warning! Reflective sand and water surfaces intensify the Sun's UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Lahaina, 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
Lahaina, 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
Lahaina, 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
Lahaina, 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
Lahaina, 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
Lahaina, 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
Lahaina, 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
Lahaina, 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
Lahaina, 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
Lahaina, 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
Lahaina, 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
Lahaina, 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).
