San Diego Weather in May: Complete Guide
San Diego Weather in May: A Detailed Overview San Diego weather in May is mild and pleasant, with average temperatures ranging from 61°F to 69°F (16°C to 21°C). Expect some morning clouds (‘May Gray’) clearing to sunny afternoons. Rainfall is minimal, with only 0.12 inches on average. Temperature: Precipitation: Humidity: Sunshine: Water Temperature: San Diego