La Costa Weather in December

December in La Costa averages 21°C (70°F) during the day and 18°C (64°F) at night. It is the wettest month of the year, with 24 mm (0.9 in) of rainfall on average, so waterproof gear is a must.

Rainfall in La Costa in December

This is the wettest month of the year, so having an umbrella ready is a smart choice. The climate data from previous years indicates about 4 days of rain, averaging 24 mm (0.9 in) for the month. The occasional light shower is possible, but rain is rarely an issue this month.

Temperature in La Costa in December

December tends to be one of the excellent months in La Costa, with 21°C (70°F) in the afternoon and 18°C (64°F) overnight. This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. Nights drop to around 18°C (64°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.

Sunshine in La Costa in December

Expect sunny days throughout the month, with an estimated 197 hours of sunshine. This makes it a pleasant time to visit La Costa.

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