Pack or skip
Sunscreen for Osaka in June
Verdict
Pack it
Sun still finds you at 80°F — UV doesn't care about temperature.
Why
Osaka in June averages highs of 80°F, lows of 67°F, 12 rainy days.
That climate means sunscreen earns its space in the bag. Sun still finds you at 80°F — UV doesn't care about temperature.