San Diego Weather in October

The climate in San Diego during October can be summarized as warm, humid and reasonably dry.

October is in the fall / autumn in San Diego and is typically the 6th coldest month of the year. Daytime maximum temperatures average around a muggy 30°C (85°F), whilst at night 16°C (61°F) is normal.

On average October is the 4th wettest month of the year in San Diego with around 66mm 2.6 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 6 days, although this may vary considerably.

On the flip side this corresponds to an average of 7.3 hours of sunshine per day.

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in San Diego in October 2025.