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

December weather forecast and climate
Long Beach, CA

A stunning shot of a colorful sunset sky over the Pacific Ocean in Long Beach, California, and views of distant city buildings, calm water, and soft sand
A stunning shot of a colorful sunset sky over the Pacific Ocean in Long Beach, California, and views of distant city buildings, calm water, and soft sand
The first month of the winter, December, is still a comfortable month in Long Beach, California, with average temperature ranging between min 45.9°F (7.7°C) and max 66.7°F (19.3°C).

Temperature

The coldest month is December, with an average high-temperature of 66.7°F (19.3°C) and an average low-temperature of 45.9°F (7.7°C).

Humidity

The average relative humidity in Long Beach is 66.2%.

Rainfall

In Long Beach, during 5 rainfall days, 1.4" (36mm) of precipitation is typically accumulated. In Long Beach, California, during the entire year, the rain falls for 35.2 days and collects up to 10.2" (259mm) of precipitation.

Ocean temperature

In December, the average ocean temperature in Long Beach is 60.4°F (15.8°C).
Note: 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).

Daylight

December has the shortest days of the year in Long Beach, California, with an average of 9.9h of daylight.

Sunshine

January, November and December, with an average of 7h of sunshine, are months with the least sunshine in Long Beach.

UV index

Months with the lowest UV index in Long Beach are January and December, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to the UV radiation for average individuals.
Note: The daily maximum UV index of 3 interpret into the following advice:
Take precautions - Protection against sunburn is recommended. 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.

What is the coldest month in Long Beach?

The coldest month in Long Beach is December, with an average high-temperature of 66.7°F (19.3°C) and an average low-temperature of 45.9°F (7.7°C).

What is the temperature in December in Long Beach?

In Long Beach, in December, the average high-temperature is 66.7°F (19.3°C), and the average low-temperature is 45.9°F (7.7°C).

What is the average humidity in December in Long Beach?

The average relative humidity in December is 66.2%.

How many days does it rain in December in Long Beach?

In Long Beach, California, in December, during 5 rainfall days, 1.4" (36mm) of precipitation is typically accumulated.

What is the ocean temperature in December in Long Beach?

In December, the average ocean temperature is 60.4°F (15.8°C). For most, swimming in 60.4°F (15.8°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

What is the month with the shortest days in Long Beach?

December has the shortest days of the year in Long Beach, with an average of 9.9h of daylight.

What is the average length of the day in December in Long Beach?

The average length of the day in December is 9.9h.

What is the month with the least sunshine in Long Beach?

January, November and December, with an average of 7h of sunshine, are months with the least sunshine in Long Beach.

How many hours of sunshine does Long Beach have in December?

The average sunshine in December is 7h.

When is the lowest UV index in Long Beach?

Months with the lowest UV index in Long Beach, California, are January and December, with an average maximum UV index of 3.

How high is the UV index in December in Long Beach?

In Long Beach, California, the average daily maximum UV index in December is 3. A UV Index estimate of 3 to 5 represents a moderate health threat from unprotected exposure to the UV radiation.
Average temperature in December - Long Beach, CA
  • Average high temperature in December: 66.8°F

The warmest month (with the highest average high temperature) is August (83.8°F).
The month with the lowest average high temperature is December (66.8°F).

  • Average low temperature in December: 45.8°F

The month with the highest average low temperature is August (64.9°F).
The coldest month (with the lowest average low temperature) is December (45.8°F).

Average humidity in December - Long Beach, CA
  • Average humidity in December: 66.2%

The month with the highest relative humidity is June (69.6%).
The month with the lowest relative humidity is January (64.7%).

Average rainfall in December - Long Beach, CA
  • Average rainfall in December: 1.4"

The wettest month (with the highest rainfall) is January (2.3").
Driest months (with the lowest rainfall) are June, July and August (0").

Average rainfall days in December - Long Beach, CA
  • Average rainfall days in December: 5 days

The month with the highest number of rainy days is February (6.5 days).
The month with the lowest number of rainy days is August (0.3 days).

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

Best months for swimming (with the highest average sea temperature) are July and August (67.9°F).
The coldest month (with the lowest average sea temperature) is January (58.3°F).

Average daylight in December / Average sunshine in December - Long Beach, CA
  • Average daylight in December: 9.9h

The month with the longest days is June (Average daylight: 14.4h).
The month with shortest days is December (Average daylight: 9.9h).

  • Average sunshine in December: 7h

Months with most sunshine are July and August (Average sunshine: 11h).
Months with least sunshine are January, November and December (Average sunshine: 7).

Average UV index in December - Long Beach, CA
  • Average UV index in December: 3

Months with the highest UV index are June, July and August (UV index 10).
Months with the lowest UV index are January and December (UV index 3).