Pack or skip
Sunscreen for Busan in June
Verdict
Pack it
Sun still finds you at 75°F — UV doesn't care about temperature.
Why
Busan in June averages highs of 75°F, lows of 63°F, 10 rainy days.
That climate means sunscreen earns its space in the bag. Sun still finds you at 75°F — UV doesn't care about temperature.