December weather forecast
Keauhou, HI

Weather in December

The first month of the winter, December, is also an agreeable month in Keauhou, Hawaii, with average temperature ranging between min 66.6°F (19.2°C) and max 70.5°F (21.4°C).

Temperature

In December, the average high-temperature is almost the same as in November - a still agreeable 70.5°F (21.4°C). The average low-temperature, in December, is 66.6°F (19.2°C).

Humidity

In Keauhou, the average relative humidity in December is 76%.

Rainfall

In December, the rain falls for 15.6 days. Throughout December, 1.3" (33mm) of precipitation is accumulated. In Keauhou, during the entire year, the rain falls for 216.1 days and collects up to 16.57" (421mm) of precipitation.

Ocean temperature

In Keauhou, the average water temperature is 77.4°F (25.2°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

The month with the shortest days in Keauhou is December, with an average of 11h of daylight.

Sunshine

November and December, with an average of 7.3h of sunshine, are months with the least sunshine in Keauhou.

UV index

January through April, November and December, with an average maximum UV index of 5, are months with the lowest UV index. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to the UV radiation for average individuals.
Note: The average daily UV index of 5 transform into the following instructions:
Take precautions - Protection against the skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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 reflection of water and sand dramatically increases exposure to the UV rays.
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FAQ

What is the average humidity in December in Keauhou?

In Keauhou, Hawaii, the average relative humidity in December is 76%.

How many days does it rain in December in Keauhou?

In Keauhou, in December, during 15.6 rainfall days, 1.3" (33mm) of precipitation is typically accumulated.

How warm is the water in December in Keauhou?

In Keauhou, Hawaii, in December, the average water temperature is 77.4°F (25.2°C). For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

What is the month with the shortest days in Keauhou?

December has the shortest days of the year in Keauhou, with an average of 11h of daylight.

How many hours of daylight does Keauhou have in December?

In Keauhou, the average length of the day in December is 11h.

What is the month with the least sunshine in Keauhou?

November and December, with an average of 7.3h of sunshine, are months with the least sunshine in Keauhou.

How long on average sun shines in December in Keauhou?

The average sunshine in December in Keauhou is 7.3h.

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

January through April, November and December, with an average maximum UV index of 5, are months with the lowest UV index in Keauhou.

How high is the UV index in December in Keauhou?

In Keauhou, the average daily maximum UV index in December is 5. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unprotected exposure to the UV radiation.

Average temperature in December
Keauhou, HI

Average temperature in December - Keauhou, HI
  • Average high temperature in December: 70.5°F

The warmest months (with the highest average high temperature) are August and October (73.2°F).
The month with the lowest average high temperature is February (68.9°F).

  • Average low temperature in December: 66.6°F

The month with the highest average low temperature is October (70°F).
The coldest month (with the lowest average low temperature) is March (64.8°F).

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Average pressure in December
Keauhou, HI

Average pressure in December - Keauhou, HI
  • Average pressure in December: 29.98"

The month with the highest atmospheric pressure is April (30.04").
Months with the lowest atmospheric pressure are September and October (29.96").

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Average wind speed in December
Keauhou, HI

Average wind speed in December - Keauhou, HI
  • Average wind speed in December: 5.3mph

The windiest month (with the highest average wind speed) is May (6.3mph).
The calmest month (with the lowest average wind speed) is December (5.3mph).

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Average humidity in December
Keauhou, HI

Average humidity in December - Keauhou, HI
  • Average humidity in December: 76%

Months with the highest relative humidity are June, July, August and September (81%).
The month with the lowest relative humidity is February (73%).

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Average rainfall in December
Keauhou, HI

Average rainfall in December - Keauhou, HI
  • Average rainfall in December: 1.3"

The wettest month (with the highest rainfall) is September (1.81").
The driest month (with the least rainfall) is January (0.75").

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Average rainfall days in December
Keauhou, HI

Average rainfall days in December - Keauhou, HI
  • Average rainfall days in December: 15.6 days

The month with the highest number of rainy days is August (21.8 days).
The month with the least rainy days is January (10.8 days).

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Average sea temperature in December
Keauhou, HI

Average sea temperature in December - Keauhou, HI
  • Average sea temperature in December: 77.4°F

The best month for swimming (with the highest average sea temperature) is September (80°F).
The coldest month (with the lowest average sea temperature) is March (76°F).

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

Average daylight in December / Average sunshine in December - Keauhou, HI
  • Average daylight in December: 11h

The month with the longest days is June (Average daylight: 13.3h).
The month with the shortest days is December (Average daylight: 11h).

  • Average sunshine in December: 7.3h

The month with the most sunshine is May (Average sunshine: 10.7h).
Months with the least sunshine are November and December (Average sunshine: 7.3).

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Average sunshine days in December
Keauhou, HI

Average sunshine days in December - Keauhou, HI
  • Average sunshine days in December: 8.3 days

The month with the most sunshine days is January (12.7 days).
The month with the least sunshine days is May (3.2 days).

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Average UV index in December
Keauhou, HI

Average UV index in December - Keauhou, HI
  • Average UV index in December: 5

Months with the highest UV index are May, June, July, August, September and October (UV index 6).
Months with the lowest UV index are January, February, March, April, November and December (UV index 5).

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Average cloud cover in December
Keauhou, HI

Average cloud cover in December - Keauhou, HI
  • Average cloud cover in December: 18

The month with the most cloud cover is June (Cloud cover 31).
The month with the least cloud cover is January (Cloud cover 15).

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Average visibility in December
Keauhou, HI

Average visibility in December - Keauhou, HI
  • Average visibility in December: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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