Monterey
California, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Monterey, CA

The scenic view of the rugged mountainous coast of Big Sur in Monterey, California, under the clear blue sky
The scenic view of the rugged mountainous coast of Big Sur in Monterey, California, under the clear blue sky
The first month of the winter, December, is also a moderate month in Monterey, California, with temperature in the range of an average low of 43.9°F (6.6°C) and an average high of 57.7°F (14.3°C).

Temperature

December is the coldest month, with an average high-temperature of 57.7°F (14.3°C) and an average low-temperature of 43.9°F (6.6°C).

Rainfall

In December, in Monterey, the rain falls for 10 days. Throughout December, 3.4" (86.6mm) of precipitation is accumulated. Throughout the year, in Monterey, there are 71 rainfall days, and 21.1" (536mm) of precipitation is accumulated.

Ocean temperature

In Monterey, the average seawater temperature is 55.6°F (13.1°C).
Note: Swimming in 55.6°F (13.1°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.

What is the coldest month in Monterey?

December is the coldest month in Monterey, California, with an average high-temperature of 57.7°F (14.3°C) and an average low-temperature of 43.9°F (6.6°C).

What is the temperature in December in Monterey?

In December, the average high-temperature is 57.7°F (14.3°C), and the average low-temperature is 43.9°F (6.6°C).

How much does it rain in Monterey in December?

In Monterey, California, during December, the rain falls for 10 days and regularly aggregates up to 3.4" (86.6mm) of precipitation.

What is the water temperature in December in Monterey?

In Monterey, California, in December, the average water temperature is 55.6°F (13.1°C). Swimming in 55.6°F (13.1°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.

What is the month with the shortest days in Monterey?

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

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

In Monterey, California, the average length of the day in December is 9.7h.
Average temperature in December - Monterey, CA
  • Average high temperature in December: 57.8°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 (57.8°F).

  • Average low temperature in December: 43.8°F

The month with the highest average low temperature is August (53.1°F).
The coldest month (with the lowest average low temperature) is January (43.7°F).

Average rainfall in December - Monterey, CA
  • Average rainfall in December: 3.4"

The wettest month (with the highest rainfall) is January (4.4").
Driest months (with the lowest rainfall) are July and August (0.1").

Average rainfall days in December - Monterey, CA
  • Average rainfall days in December: 10 days

The month with the highest number of rainy days is January (11 days).
Months with the lowest number of rainy days are July, August and September (2 days).

Average sea temperature in December - Monterey, CA
  • Average sea temperature in December: 55.6°F

Best months for swimming (with the highest average sea temperature) are August and September (58.1°F).
The coldest month (with the lowest average sea temperature) is April (53.8°F).

Average daylight in December - Monterey, 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).