December weather forecastHeeia, HI
December
Weather in December
December, the first month of the winter in Heeia, is still a warm month, with temperature in the range of an average low of 72°F (22.2°C) and an average high of 76.1°F (24.5°C).Temperature
Heeia experiences a subtle adjustment in high-temperatures to a still moderately hot 76.1°F (24.5°C) with the onset of December, maintaining near parity with November's 78.3°F (25.7°C). Throughout December, Heeia records a steady low-temperature average of 72°F (22.2°C), a minor decrease from its daytime counterpart.Humidity
The months with the highest humidity are February through April, July, August, October and December, with an average relative humidity of 76%.Rainfall
In Heeia, in December, it is raining for 15.9 days, with typically 1.77" (45mm) of accumulated precipitation. In Heeia, during the entire year, the rain falls for 187.1 days and collects up to 15.83" (402mm) of precipitation.Ocean temperature
In Heeia, in December, the average water temperature is 77°F (25°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
The month with the shortest days is December, with an average of 10h and 54min of daylight.On the first day of December in Heeia, sunrise is at 6:53 am and sunset at 5:48 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 6:00 pm HST.
Sunshine
The month with the least sunshine in Heeia, Hawaii, is December, with an average of 6.3h of sunshine.UV index
January through June, October through December, with an average maximum UV index of 6, are months with the lowest UV index in Heeia. 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: A maximum daily UV index of 6 during December morphs into the following directions:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Attention! UV radiation is markedly stronger with water and sand reflections.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Heeia, HI
- Average high temperature in December: 76.1°F
The warmest months (with the highest average high temperature) are August and September (81°F).
The month with the lowest average high temperature is February (74.3°F).
- Average low temperature in December: 72°F
The month with the highest average low temperature is August (76.6°F).
The coldest month (with the lowest average low temperature) is February (69.6°F).
Average pressure in December
Heeia, 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
Heeia, HI
- Average wind speed in December: 11.4mph
The windiest month (with the highest average wind speed) is July (13.5mph).
The calmest month (with the lowest average wind speed) is January (10.3mph).
Average humidity in December
Heeia, HI
- Average humidity in December: 76%
The months with the highest relative humidity are February, March, April, July, August, October and December (76%).
The months with the lowest relative humidity are January, May, June, September and November (75%).
Average rainfall in December
Heeia, HI
- Average rainfall in December: 1.77"
The wettest month (with the highest rainfall) is March (2.01").
The driest month (with the least rainfall) is July (0.71").
Average rainfall days in December
Heeia, HI
- Average rainfall days in December: 15.9 days
The month with the highest number of rainy days is March (18.3 days).
The month with the least rainy days is June (13.5 days).
Average sea temperature in December
Heeia, HI
- Average sea temperature in December: 77°F
The best month for swimming (with the highest average sea temperature) is September (80.4°F).
The coldest month (with the lowest average sea temperature) is March (75.7°F).
Average daylight in December /
Average sunshine in December
Heeia, 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 18min
The month with the most sunshine is June (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 6h and 18min).
Average sunshine days in December
Heeia, HI
- Average sunshine days in December: 8.2 days
The month with the most sunshine days is June (12.2 days).
The month with the least sunshine days is April (6.5 days).
Average UV index in December
Heeia, HI
- Average UV index in December: 6
The months with the highest UV index are July, August and September (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, October, November and December (UV index 6).
Average cloud cover in December
Heeia, HI
- Average cloud cover in December: 37
The month with the most cloud cover is March (Cloud cover 41).
The month with the least cloud cover is September (Cloud cover 32).
Average visibility in December
Heeia, 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).
