Pack or skip
Sunscreen for Busan in April
Verdict
Pack it
Sun still finds you at 62°F — UV doesn't care about temperature.
Why
Busan in April averages highs of 62°F, lows of 48°F, 8 rainy days.
That climate means sunscreen earns its space in the bag. Sun still finds you at 62°F — UV doesn't care about temperature.