December weather forecast
Avalon, CA

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Weather in December

December, the first month of the winter in Avalon, is still a mild month, with temperature in the range of an average high of 60.6°F (15.9°C) and an average low of 56.5°F (13.6°C).

Temperature

December's onset sees an average high-temperature of a moderate 60.6°F (15.9°C), exhibiting a slight fluctuation from the previous month. An average temperature of 56.5°F (13.6°C) is logged during the nights of December in Avalon, a small step down from daytime highs.

Humidity

With an average relative humidity of 68%, December is the least humid month.

Rainfall

December is the month with the most rainfall. Rain falls for 6.8 days and accumulates 1.54" (39mm) of precipitation.

Ocean temperature

In Avalon, in December, the average water temperature is 60.4°F (15.8°C).
Note: Most people do not enjoy swimming in water that is 60.4°F (15.8°C). Breathing becomes increasingly challenging as the water temperature dips under 69.8°F (21°C).

Daylight

December has the shortest days of the year, with an average of 10h and 0min of daylight.
On the first day of the month, sunrise is at 6:39 am and sunset at 4:45 pm. On the last day of December, in Avalon, sunrise is at 6:56 am and sunset at 4:56 pm PST.

Sunshine

With an average of 6.4h of sunshine, December has the least sunshine of the year in Avalon.

UV index

January through May, November and December, with an average maximum UV index of 4, are months with the lowest UV index in Avalon. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: In December, a regular UV index of 4 translates into these guidelines:
Ensure safety - Recommendations to avert sunburn are presented. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
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Frequently asked questions

What are the temperatures in Avalon in December?

In Avalon, in December, the average high-temperature is 60.6°F (15.9°C), and the average low-temperature is 56.5°F (13.6°C).

What is the least humid month in Avalon?

The least humid month in Avalon is December, with an average relative humidity of 68%.

What is the average humidity in December in Avalon?

In December, the average relative humidity in Avalon is 68%.

What is the rainiest month in Avalon?

The month with the most rainfall is December, when the rain falls for 6.8 days and typically aggregates up to 1.54" (39mm) of precipitation.

How many days does it rain in December in Avalon?

In Avalon, during December, the rain falls for 6.8 days and regularly aggregates up to 1.54" (39mm) of precipitation.

How cold is the water in December in Avalon?

In December, the average ocean temperature in Avalon is 60.4°F (15.8°C). Swimming in 60.4°F (15.8°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

What is the month with the shortest days in Avalon?

The month with the shortest days in Avalon is December, with an average of 10h and 0min of daylight.

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

In Avalon, the average day length in December is 9h and 59min.

When is the sunrise / sunset in December in Avalon?

On the first day of December in Avalon, California, sunrise is at 6:39 am and sunset at 4:45 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 4:56 pm PST.

What is the month with the least sunshine in Avalon?

December has the least sunshine of the year in Avalon, with an average of 6.4h of sunshine.

How many hours of sunshine does Avalon have in December?

In December, the average sunshine duration is 6.4h.

When is the lowest UV index in Avalon?

January through May, November and December, with an average maximum UV index of 4, are months with the lowest UV index in Avalon.

What is the UV index intensity in December in Avalon?

In December, the average daily maximum UV index in Avalon, California, is 4. A UV Index reading of 3 to 5 represents a moderate vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Avalon, CA

Average temperature in December - Avalon, CA
  • Average high temperature in December: 60.6°F

The warmest month (with the highest average high temperature) is September (67.8°F).
The month with the lowest average high temperature is February (59.4°F).

  • Average low temperature in December: 56.5°F

The month with the highest average low temperature is September (63.1°F).
The coldest month (with the lowest average low temperature) is March (54.9°F).

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Average pressure in December
Avalon, CA

Average pressure in December - Avalon, CA
  • Average pressure in December: 30.07"Hg

The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is September (29.9"Hg).

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Average wind speed in December
Avalon, CA

Average wind speed in December - Avalon, CA
  • Average wind speed in December: 8.1mph

The windiest month (with the highest average wind speed) is April (9.1mph).
The calmest months (with the lowest average wind speed) are June and July (6.8mph).

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Average humidity in December
Avalon, CA

Average humidity in December - Avalon, CA
  • Average humidity in December: 68%

The months with the highest relative humidity are June and July (86%).
The month with the lowest relative humidity is December (68%).

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Average rainfall in December
Avalon, CA

Average rainfall in December - Avalon, CA
  • Average rainfall in December: 1.54"

The wettest month (with the highest rainfall) is December (1.54").
The driest month (with the least rainfall) is June (0.12").

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Average rainfall days in December
Avalon, CA

Average rainfall days in December - Avalon, CA
  • Average rainfall days in December: 6.8 days

The month with the highest number of rainy days is March (7.2 days).
The month with the least rainy days is September (4.7 days).

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Average sea temperature in December
Avalon, CA

Average sea temperature in December - Avalon, CA
  • Average sea temperature in December: 60.4°F

The best month for swimming (with the highest average sea temperature) is August (67.7°F).
The coldest months (with the lowest average sea temperature) are January and February (58.7°F).

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Average daylight in December /
Average sunshine in December
Avalon, CA

Average daylight in December / Average sunshine in December - Avalon, CA
  • Average daylight in December: 10h and 0min

The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).

  • Average sunshine in December: 6h and 2min

The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).

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Average sunshine days in December
Avalon, CA

Average sunshine days in December - Avalon, CA
  • Average sunshine days in December: 22.6 days

The month with the most sunshine days is January (24.2 days).
The month with the least sunshine days is June (19.6 days).

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Average UV index in December
Avalon, CA

Average UV index in December - Avalon, CA
  • Average UV index in December: 4

The months with the highest UV index are June, July, August, September and October (UV index 5).
The months with the lowest UV index are January, February, March, April, May, November and December (UV index 4).

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Average cloud cover in December
Avalon, CA

Average cloud cover in December - Avalon, CA
  • Average cloud cover in December: 26

The month with the most cloud cover is June (Cloud cover 40).
The months with the least cloud cover are October and November (Cloud cover 21).

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Average visibility in December
Avalon, CA

Average visibility in December - Avalon, CA
  • 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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Avalon, California, USA

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