Pack or skip
Sunscreen for San Diego in May
Verdict
Pack it
Sun still finds you at 73°F — UV doesn't care about temperature.
Why
San Diego in May averages highs of 73°F, lows of 61°F, 1 rainy days.
That climate means sunscreen earns its space in the bag. Sun still finds you at 73°F — UV doesn't care about temperature.