Big Sur
California, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Big Sur, CA

December, the first month of the winter, in Big Sur, is still a mild month, with average temperature varying between 59.9°F (15.5°C) and 41.9°F (5.5°C).

Temperature

In Big Sur, California, the average high-temperature is relatively the same as in November - a mild 59.9°F (15.5°C). The average low-temperature, in Big Sur, is 41.9°F (5.5°C).

Rainfall

In Big Sur, during December, the rain falls for 10.3 days and regularly aggregates up to 7.6" (193.5mm) of precipitation. Throughout the year, in Big Sur, there are 66.4 rainfall days, and 43.7" (1109.5mm) of precipitation is accumulated.

Ocean temperature

In December, the average ocean temperature in Big Sur 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

The month with the shortest days is December, with an average of 9.7h of daylight.

Sunshine

The month with the least sunshine in Big Sur, California, is December, with an average of 5h of sunshine.

UV index

The month with the lowest UV index in Big Sur is December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily maximum UV index of 2 interpret into the following advice:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. 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.

What is the temperature in December in Big Sur?

In Big Sur, California, in December, the average high-temperature is 59.9°F (15.5°C), and the average low-temperature is 41.9°F (5.5°C).

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

In Big Sur, California, in December, during 10.3 rainfall days, 7.6" (193.5mm) of precipitation is typically accumulated.

How cold is the water in December in Big Sur?

In December, the average ocean temperature in Big Sur is 55.4°F (13°C). At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

What is the month with the shortest days in Big Sur?

December has the shortest days of the year in Big Sur, California, with an average of 9.7h of daylight.

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

In Big Sur, California, the average length of the day in December is 9.7h.

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

With an average of 5h of sunshine, December has the least sunshine of the year in Big Sur, California.

How many hours of sunshine does Big Sur have in December?

In December, the average sunshine is 5h.

When is the lowest UV index in Big Sur?

The month with the lowest UV index is December, with an average maximum UV index of 2.

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

In December, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a low health threat from unsafe exposure to the Sun's UV rays.
Average temperature in December - Big Sur, CA
  • Average high temperature in December: 59.9°F

The warmest month (with the highest average high temperature) is August (77.3°F).
The month with the lowest average high temperature is January (59.7°F).

  • Average low temperature in December: 41.9°F

The month with the highest average low temperature is July (50.4°F).
The coldest month (with the lowest average low temperature) is December (41.9°F).

Average rainfall in December - Big Sur, CA
  • Average rainfall in December: 7.6"

The wettest month (with the highest rainfall) is January (9.1").
The driest month (with the lowest rainfall) is July (0").

Average rainfall days in December - Big Sur, CA
  • Average rainfall days in December: 10.3 days

The month with the highest number of rainy days is February (11.2 days).
The month with the lowest number of rainy days is July (0.3 days).

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

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

Average daylight in December / Average sunshine in December - Big Sur, CA
  • Average daylight in December: 9.7h

The month with the longest days is June (Average daylight: 14.6h).
The month with shortest days is December (Average daylight: 9.7h).

  • Average sunshine in December: 5h

Months with most sunshine are May and June (Average sunshine: 11h).
The month with least sunshine is December (Average sunshine: 5h).

Average UV index in December - Big Sur, CA
  • Average UV index in December: 2

Months with the highest UV index are June and July (UV index 10).
The month with the lowest UV index is December (UV index 2).