December weather forecastMaili, HI
December
Weather in December
December brings along the cheerful ambiance of winter in Maili, Hawaii. The ambient temperature drops further down to 76.6°F (24.8°C), marking the onset of the coldest month of the year. Consistent with the winter months, December records a marginal rise in rainfall to 1.46" (37mm). Daylight recedes to 10.8 hours as the winter solstice approaches, showing the shortest day of the year. Despite the monotonously overcast sky covering 34% of the month, the relative humidity remains at 76%, ensuring a comfortable end to the year.Temperature
Maili notes an average high-temperature of a still moderately hot 76.6°F (24.8°C) in December, hardly diverging from November. Maili's average nighttime temperature in December modestly descends to a pleasant 71.8°F (22.1°C).Humidity
December is the most humid month, with an average relative humidity of 76%.Rainfall
In Maili, in December, during 15.5 rainfall days, 1.46" (37mm) of precipitation is typically accumulated. In Maili, during the entire year, the rain falls for 196.3 days and collects up to 14.72" (374mm) of precipitation.Ocean temperature
In Maili, in December, the average water temperature is 77.4°F (25.2°C).Note: Water temperatures ranging between 77°F (25°C) and 84.2°F (29°C) are regarded as very warm, making swimming, diving, and similar water activities pleasurable for extended periods.
Daylight
December has the shortest days of the year, with an average of 10h and 54min of daylight.On the first day of December, sunrise is at 6:54 am and sunset at 5:49 pm. On the last day of the month, sunrise is at 7:10 am and sunset at 6:01 pm HST.
Sunshine
In December, the average sunshine is 6.7h.UV index
January through May, October through 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 risk from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index of 6 during December leads to these instructions:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Caution! Sand and water reflections can notably increase the UV radiation intensity.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Maili, HI
- Average high temperature in December: 76.6°F
The warmest months (with the highest average high temperature) are August and September (81.7°F).
The month with the lowest average high temperature is February (75°F).
- Average low temperature in December: 71.8°F
The months with the highest average low temperature are August and September (75.9°F).
The coldest month (with the lowest average low temperature) is February (69.1°F).
Average pressure in December
Maili, 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
Maili, HI
- Average wind speed in December: 9.7mph
The windiest month (with the highest average wind speed) is July (11.6mph).
The calmest month (with the lowest average wind speed) is October (8.8mph).
Average humidity in December
Maili, HI
- Average humidity in December: 76%
The month with the highest relative humidity is December (76%).
The months with the lowest relative humidity are January, April, May, June, August, September, October and November (74%).
Average rainfall in December
Maili, HI
- Average rainfall in December: 1.46"
The wettest month (with the highest rainfall) is March (1.81").
The driest month (with the least rainfall) is July (0.67").
Average rainfall days in December
Maili, HI
- Average rainfall days in December: 15.5 days
The month with the highest number of rainy days is September (18.9 days).
The month with the least rainy days is January (13.8 days).
Average sea temperature in December
Maili, HI
- Average sea temperature in December: 77.3°F
The best month for swimming (with the highest average sea temperature) is September (80.6°F).
The coldest month (with the lowest average sea temperature) is March (75.7°F).
Average daylight in December /
Average sunshine in December
Maili, 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: 10h and 48min).
The month with the least sunshine is November (Average sunshine: 6h and 36min).
Average sunshine days in December
Maili, HI
- Average sunshine days in December: 8.8 days
The month with the most sunshine days is January (11.8 days).
The month with the least sunshine days is November (6.4 days).
Average UV index in December
Maili, HI
- Average UV index in December: 6
The months with the highest UV index are June, July, August and September (UV index 7).
The months with the lowest UV index are January, February, March, April, May, October, November and December (UV index 6).
Average cloud cover in December
Maili, HI
- Average cloud cover in December: 34
The month with the most cloud cover is March (Cloud cover 38).
The months with the least cloud cover are January and September (Cloud cover 32).
Average visibility in December
Maili, 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).
