Typical Weather in San Diego, CA in December

66° F Avg High

49° F Avg Low

3 Rainy Days

☀️ Temperature Summary

December is one of the cooler months of the year for San Diego, with highs averaging around 66°F. You can expect overnight lows near 49°F most days. This is the coldest month of the year in San Diego.

Despite it being the coolest month of the year, December is still a great time to visit San Diego, with mild temperatures and sunny days being very common.

High Temps Throughout the Year

☔ Rain Summary

You can expect about a 11% chance of rain for any given day in December. It's one of the rainier months of the year for San Diego, with total rainfall for the month around 2 inches.