San Luis Obispo Weather in July

The climate in San Luis Obispo during July can be summarized as warm and very dry.

July is in the summer in San Luis Obispo and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around 26°C (78°F), whilst at night 12°C (53°F) is normal.

On average July is the 2nd driest month of the year in San Luis Obispo with around 3mm 0.1 inches of rain making it a very dry time to visit.

On the flip side this corresponds to an average of 11.3 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 Luis Obispo in July 2025.