December weather forecast
Big Sur, CA

Weather in December

December, the first month of the winter in Big Sur, is still a mild month, with an average temperature fluctuating between 46.9°F (8.3°C) and 57°F (13.9°C).

Temperature

The coldest month is December, with an average high-temperature of 57°F (13.9°C) and an average low-temperature of 46.9°F (8.3°C).

Humidity

In Big Sur, the average relative humidity in December is 72%.

Rainfall

December is the month with the most rainfall in Big Sur. Rain falls for 9.8 days and accumulates 2.48" (63mm) of precipitation.

Ocean temperature

In Big Sur, the average water temperature is 55.4°F (13°C).
Note: Swimming in 55.4°F (13°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

With an average of 9h and 44min of daylight, December has the shortest days of the year in Big Sur.
On the first day of the month, sunrise is at 7:00 am and sunset at 4:52 pm. On the last day of December, in Big Sur, sunrise is at 7:18 am and sunset at 5:02 pm PST.

Sunshine

With an average of 5.9h of sunshine, December has the least sunshine of the year in Big Sur, California.

UV index

December is the month with the lowest UV index, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 3 in December interpret into the following advice:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the coldest month in Big Sur?

The coldest month is December, with an average high-temperature of 57°F (13.9°C) and an average low-temperature of 46.9°F (8.3°C).

What is the temperature in December in Big Sur?

In December, in Big Sur, the average high-temperature is 57°F (13.9°C), and the average low-temperature is 46.9°F (8.3°C).

What is the average humidity in December in Big Sur?

In Big Sur, California, the average relative humidity in December is 72%.

What is the wettest month in Big Sur?

The month with the most rainfall in Big Sur is December, when the rain falls for 9.8 days and typically aggregates up to 2.48" (63mm) of precipitation.

How many days does it rain in December in Big Sur?

In December, in Big Sur, the rain falls for 9.8 days. Throughout December, 2.48" (63mm) of precipitation is accumulated.

What is the water temperature in December in Big Sur?

In December, the average ocean temperature in Big Sur is 55.4°F (13°C). Swimming in 55.4°F (13°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 Big Sur?

With an average of 9h and 44min of daylight, December has the shortest days of the year in Big Sur, California.

What is the average length of the day in December in Big Sur?

In December, the average day length in Big Sur, California, is 9h and 44min.

What time are sunrise and sunset in December in Big Sur?

In December, on the first day of the month, sunrise is at 7:00 am and sunset at 4:52 pm. On the last day of the month, in Big Sur, California, sunrise is at 7:18 am and sunset at 5:02 pm PST.

What is the month with the least sunshine in Big Sur?

December has the least sunshine of the year in Big Sur, with an average of 5.9h of sunshine.

How long on average sun shines in December in Big Sur?

In December, the average sunshine duration in Big Sur, California, is 5.9h.

When is the lowest UV index in Big Sur?

December is the month with the lowest UV index in Big Sur, with an average maximum UV index of 3.

What is the UV index reading in December in Big Sur?

In Big Sur, California, the average daily maximum UV index in December is 3. A UV Index of 3 to 5 symbolizes a moderate health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Big Sur, CA

Average temperature in December - Big Sur, CA
  • Average high temperature in December: 57°F

The warmest month (with the highest average high temperature) is September (69.6°F).
The month with the lowest average high temperature is December (57°F).

  • Average low temperature in December: 46.9°F

The month with the highest average low temperature is September (55.4°F).
The coldest month (with the lowest average low temperature) is December (46.9°F).

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Average pressure in December
Big Sur, CA

Average pressure in December - Big Sur, CA
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.93"Hg).

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Average wind speed in December
Big Sur, CA

Average wind speed in December - Big Sur, CA
  • Average wind speed in December: 7.3mph

The windiest month (with the highest average wind speed) is April (8.5mph).
The calmest month (with the lowest average wind speed) is August (6.2mph).

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Average humidity in December
Big Sur, CA

Average humidity in December - Big Sur, CA
  • Average humidity in December: 72%

The month with the highest relative humidity is August (79%).
The month with the lowest relative humidity is November (70%).

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Average rainfall in December
Big Sur, CA

Average rainfall in December - Big Sur, CA
  • Average rainfall in December: 2.48"

The wettest month (with the highest rainfall) is December (2.48").
The driest month (with the least rainfall) is August (0.04").

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Average rainfall days in December
Big Sur, CA

Average rainfall days in December - Big Sur, CA
  • Average rainfall days in December: 9.8 days

The month with the highest number of rainy days is March (12.3 days).
The month with the least rainy days is August (1.3 days).

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Average sea temperature in December
Big Sur, CA

Average sea temperature in December - Big Sur, CA
  • Average sea temperature in December: 55°F

The best months for swimming (with the highest average sea temperature) are August, September and October (59°F).
The coldest months (with the lowest average sea temperature) are March, April and May (54°F).

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Average daylight in December /
Average sunshine in December
Big Sur, CA

Average daylight in December / Average sunshine in December - Big Sur, CA
  • Average daylight in December: 9h and 44min

The month with the longest days is June (Average daylight: 14h and 35min).
The month with the shortest days is December (Average daylight: 9h and 44min).

  • Average sunshine in December: 5h and 54min

The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 54min).

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Average sunshine days in December
Big Sur, CA

Average sunshine days in December - Big Sur, CA
  • Average sunshine days in December: 20.3 days

The month with the most sunshine days is August (27.8 days).
The month with the least sunshine days is March (17.3 days).

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Average UV index in December
Big Sur, CA

Average UV index in December - Big Sur, CA
  • Average UV index in December: 3

The months with the highest UV index are June, July, August and September (UV index 5).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in December
Big Sur, CA

Average cloud cover in December - Big Sur, CA
  • Average cloud cover in December: 33

The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 13).

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Average visibility in December
Big Sur, CA

Average visibility in December - Big Sur, 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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