Pack or skip
Sunscreen for Busan in May
Verdict
Pack it
Sun still finds you at 69°F — UV doesn't care about temperature.
Why
Busan in May averages highs of 69°F, lows of 55°F, 9 rainy days.
That climate means sunscreen earns its space in the bag. Sun still finds you at 69°F — UV doesn't care about temperature.