December weather forecast
Maunaloa, HI

Weather in December

December, the first month of the winter in Maunaloa, is also a moderately hot month, with temperature in the range of an average low of 73.6°F (23.1°C) and an average high of 75.9°F (24.4°C).

Temperature

In Maunaloa, the average high-temperature in December is essentially the same as in November - a still moderately hot 75.9°F (24.4°C). The average low-temperature, in December, is 73.6°F (23.1°C).

Humidity

In Maunaloa, the average relative humidity in December is 75%.

Rainfall

In December, in Maunaloa, the rain falls for 11.4 days. Throughout December, 1.22" (31mm) of precipitation is accumulated. In Maunaloa, during the entire year, the rain falls for 126.4 days and collects up to 9.84" (250mm) of precipitation.

Ocean temperature

In December, the average ocean temperature in Maunaloa, Hawaii, is 77°F (25°C).
Note: Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

December has the shortest days of the year, with an average of 10h and 52min of daylight.
On the first day of the month, sunrise is at 6:49 am and sunset at 5:46 pm. On the last day of December, in Maunaloa, sunrise is at 7:05 am and sunset at 5:58 pm HST.

Sunshine

The month with the least sunshine in Maunaloa is December, with an average of 6.8h of sunshine.

UV index

January through May, 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 vulnerability from exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 6 in December transform into the following instructions:
Take precautions against overexposure. Protection against sun damage is needed. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.
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FAQ

What is the average humidity in December in Maunaloa?

The average relative humidity in December in Maunaloa, Hawaii, is 75%.

How many days does it rain in December in Maunaloa?

In Maunaloa, Hawaii, during December, the rain falls for 11.4 days and regularly aggregates up to 1.22" (31mm) of precipitation.

What is the ocean temperature in December in Maunaloa?

In December, the average ocean temperature is 77°F (25°C). Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

What is the month with the shortest days in Maunaloa?

With an average of 10h and 52min of daylight, December has the shortest days of the year in Maunaloa, Hawaii.

What is the average length of the day in December in Maunaloa?

In Maunaloa, the average day length in December is 10h and 52min.

When is the sunrise / sunset in December in Maunaloa?

In December, on the first day of the month, sunrise is at 6:49 am and sunset at 5:46 pm. On the last day of the month, in Maunaloa, sunrise is at 7:05 am and sunset at 5:58 pm HST.

What is the month with the least sunshine in Maunaloa?

The month with the least sunshine in Maunaloa, Hawaii, is December, with an average of 6.8h of sunshine.

How long on average sun shines in December in Maunaloa?

In Maunaloa, Hawaii, the average sunshine duration in December is 6.8h.

What are the months with the lowest UV index in Maunaloa?

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

What is the UV index intensity in December in Maunaloa?

The average daily maximum UV index in December in Maunaloa, Hawaii, is 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Maunaloa, HI

Average temperature in December - Maunaloa, HI
  • Average high temperature in December: 75.9°F

The warmest months (with the highest average high temperature) are August and September (80.2°F).
The month with the lowest average high temperature is February (74.3°F).

  • Average low temperature in December: 73.6°F

The months with the highest average low temperature are September and October (77.2°F).
The coldest month (with the lowest average low temperature) is March (71.2°F).

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Average pressure in December
Maunaloa, HI

Average pressure in December - Maunaloa, HI
  • Average pressure in December: 29.99"Hg

The months with the highest atmospheric pressure are March and April (30.05"Hg).
The months with the lowest atmospheric pressure are September and October (29.97"Hg).

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Average wind speed in December
Maunaloa, HI

Average wind speed in December - Maunaloa, HI
  • Average wind speed in December: 12mph

The windiest month (with the highest average wind speed) is July (13.9mph).
The calmest month (with the lowest average wind speed) is January (10.8mph).

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Average humidity in December
Maunaloa, HI

Average humidity in December - Maunaloa, HI
  • Average humidity in December: 75%

The months with the highest relative humidity are April, May, June, July and August (76%).
The months with the lowest relative humidity are January and November (74%).

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Average rainfall in December
Maunaloa, HI

Average rainfall in December - Maunaloa, HI
  • Average rainfall in December: 1.22"

The wettest month (with the highest rainfall) is March (1.3").
The driest month (with the least rainfall) is July (0.31").

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Average rainfall days in December
Maunaloa, HI

Average rainfall days in December - Maunaloa, HI
  • Average rainfall days in December: 11.4 days

The month with the highest number of rainy days is March (13.2 days).
The month with the least rainy days is July (8.5 days).

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Average sea temperature in December
Maunaloa, HI

Average sea temperature in December - Maunaloa, 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).

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Average daylight in December /
Average sunshine in December
Maunaloa, HI

Average daylight in December / Average sunshine in December - Maunaloa, HI
  • Average daylight in December: 10h and 52min

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 52min).

  • Average sunshine in December: 6h and 48min

The month with the most sunshine is June (Average sunshine: 11h and 30min).
The month with the least sunshine is December (Average sunshine: 6h and 48min).

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Average sunshine days in December
Maunaloa, HI

Average sunshine days in December - Maunaloa, HI
  • Average sunshine days in December: 12.5 days

The month with the most sunshine days is July (16.1 days).
The month with the least sunshine days is November (10.8 days).

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Average UV index in December
Maunaloa, HI

Average UV index in December - Maunaloa, HI
  • Average UV index in December: 6

The months with the highest UV index are June, July, August, September and October (UV index 7).
The months with the lowest UV index are January, February, March, April, May, November and December (UV index 6).

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Average cloud cover in December
Maunaloa, HI

Average cloud cover in December - Maunaloa, HI
  • Average cloud cover in December: 27

The months with the most cloud cover are February and March (Cloud cover 30).
The month with the least cloud cover is September (Cloud cover 23).

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Average visibility in December
Maunaloa, HI

Average visibility in December - Maunaloa, 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).

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