La Jolla
California, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
La Jolla, CA

Ocean temperature

In La Jolla, California, the average seawater temperature in December 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

The month with the shortest days in La Jolla is December, with an average of 10h of daylight.

How cold is the water in December in La Jolla?

In December, the average ocean temperature in La Jolla, California, 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 La Jolla?

December has the shortest days of the year in La Jolla, with an average of 10h of daylight.

How many hours of daylight does La Jolla have in December?

The average length of the day in December is 10h.
Average sea temperature in December - La Jolla, CA
  • Average sea temperature in December: 60.4°F

The best month for swimming (with the highest average sea temperature) is August (67.9°F).
The coldest month (with the lowest average sea temperature) is February (58.7°F).

Average daylight in December - La Jolla, CA
  • Average daylight in December: 10h

The month with the longest days is June (Average daylight: 14.3h).
The month with shortest days is December (Average daylight: 10h).