Pack or skip
Sunscreen for Osaka in August
Verdict
Pack it
Sun still finds you at 89°F — UV doesn't care about temperature.
Why
Osaka in August averages highs of 89°F, lows of 76°F, 9 rainy days.
That climate means sunscreen earns its space in the bag. Sun still finds you at 89°F — UV doesn't care about temperature.