San Diego Weather In December

San Diego December Weather is cooler than November, and by the middle of the month the average daily high will be in the mid 60s and the low will drop to around 50. Not exactly cold, but not exactly swimming weather.

San Diego averages 6 days with measurable rain, and 1.31 inches of rainfall in December.

It is important to remember that you will still need sun screen when you visit one of the many San Diego area attractions. The San Diego Weather in December is sunny enough and enjoyable enough that you may spend hours outdoors.