December weather forecast and climate
El Granada, CA

Weather in December

December, the first month of the winter, in El Granada, is still a mild month, with average temperature varying between 55.6°F (13.1°C) and 49.3°F (9.6°C).

Temperature

The coldest month is December, with an average high-temperature of 55.6°F (13.1°C) and an average low-temperature of 49.3°F (9.6°C).

Humidity

November and December, with an average relative humidity of 72%, are the least humid months.

Rainfall

In El Granada, during December, the rain falls for 8.4 days and regularly aggregates up to 1.5" (38mm) of precipitation. Throughout the year, in El Granada, there are 76.8 rainfall days, and 8.54" (217mm) of precipitation is accumulated.

Ocean temperature

In El Granada, the average seawater temperature in December is 54.5°F (12.5°C).
Note: Swimming in 54.5°F (12.5°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

Daylight

The month with the shortest days is December, with an average of 9.6h of daylight.

Sunshine

With an average of 5.7h of sunshine, December has the least sunshine of the year.

UV index

January through May, July, October through December, with an average maximum UV index of 4, are months with the lowest UV index in El Granada. A UV Index estimate of 3 to 5 represents a medium vulnerability from the exposure to the Sun's UV rays for the ordinary person.
Note: In December, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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.
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FAQ

What is the coldest month in El Granada?

December is the coldest month, with an average high-temperature of 55.6°F (13.1°C) and an average low-temperature of 49.3°F (9.6°C).

What is the temperature in December in El Granada?

The average high-temperature, in December, in El Granada, is 55.6°F (13.1°C), while the average low-temperature is 49.3°F (9.6°C).

What is the least humid month in El Granada?

November and December, with an average relative humidity of 72%, are the least humid months in El Granada, California.

What is the average humidity in December in El Granada?

In El Granada, the average relative humidity in December is 72%.

How much does it rain in El Granada in December?

In El Granada, during December, the rain falls for 8.4 days and regularly aggregates up to 1.5" (38mm) of precipitation.

What is the ocean temperature in December in El Granada?

In El Granada, California, in December, the average water temperature is 54.5°F (12.5°C). Swimming in 54.5°F (12.5°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

What is the month with the shortest days in El Granada?

The month with the shortest days is December, with an average of 9.6h of daylight.

What is the average length of the day in December in El Granada?

In El Granada, the average length of the day in December is 9.6h.

What is the month with the least sunshine in El Granada?

The month with the least sunshine is December, with an average of 5.7h of sunshine.

How long on average sun shines in December in El Granada?

In El Granada, the average sunshine in December is 5.7h.

When is the lowest UV index in El Granada?

Months with the lowest UV index in El Granada, California, are January through May, July, October through December, with an average maximum UV index of 4.

How high is the UV index in December in El Granada?

In December, the average daily maximum UV index in El Granada, California, is 4. A UV Index of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to the UV radiation.

Average temperature in December
El Granada, CA

Average temperature in December - El Granada, CA
  • Average high temperature in December: 55.6°F

The warmest month (with the highest average high temperature) is September (66.9°F).
The month with the lowest average high temperature is December (55.6°F).

  • Average low temperature in December: 49.3°F

The month with the highest average low temperature is September (56.7°F).
The coldest month (with the lowest average low temperature) is February (48.7°F).

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Average pressure in December
El Granada, CA

Average pressure in December - El Granada, CA
  • Average pressure in December: 30.1"

The month with the highest atmospheric pressure is January (30.13").
The month with the lowest atmospheric pressure is September (29.92").

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Average wind speed in December
El Granada, CA

Average wind speed in December - El Granada, CA
  • Average wind speed in December: 8.4mph

The windiest month (with the highest average wind speed) is April (9.6mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).

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Average humidity in December
El Granada, CA

Average humidity in December - El Granada, CA
  • Average humidity in December: 72%

The month with the highest relative humidity is August (82%).
Months with the lowest relative humidity are November and December (72%).

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Average rainfall in December
El Granada, CA

Average rainfall in December - El Granada, CA
  • Average rainfall in December: 1.5"

The wettest month (with the highest rainfall) is February (1.61").
The driest months (with the least rainfall) are June and July (0.12").

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Average rainfall days in December
El Granada, CA

Average rainfall days in December - El Granada, CA
  • Average rainfall days in December: 8.4 days

The month with the highest number of rainy days is March (10.8 days).
The month with the least rainy days is June (3 days).

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Average sea temperature in December
El Granada, CA

Average sea temperature in December - El Granada, CA
  • Average sea temperature in December: 54.5°F

The best month for swimming (with the highest average sea temperature) is September (57.3°F).
The coldest months (with the lowest average sea temperature) are April and June (53°F).

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Average daylight in December /
Average sunshine in December
El Granada, CA

Average daylight in December / Average sunshine in December - El Granada, CA
  • Average daylight in December: 9.6h

The month with the longest days is June (Average daylight: 14.7h).
The month with the shortest days is December (Average daylight: 9.6h).

  • Average sunshine in December: 5.7h

The month with the most sunshine is July (Average sunshine: 11.4h).
The month with the least sunshine is December (Average sunshine: 5.7h).

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Average sunshine days in December
El Granada, CA

Average sunshine days in December - El Granada, CA
  • Average sunshine days in December: 21.1 days

The month with the most sunshine days is October (24.6 days).
Months with the least sunshine days are March and August (18.8 days).

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Average UV index in December
El Granada, CA

Average UV index in December - El Granada, CA
  • Average UV index in December: 4

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

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Average cloud cover in December
El Granada, CA

Average cloud cover in December - El Granada, CA
  • Average cloud cover in December: 36

The month with the most cloud cover is March (Cloud cover 38).
The month with the least cloud cover is September (Cloud cover 18).

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Average visibility in December
El Granada, CA

Average visibility in December - El Granada, CA
  • 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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