Pack or skip
Sunscreen for São Paulo in October
Verdict
Pack it
Sun still finds you at 75°F — UV doesn't care about temperature.
Why
São Paulo in October averages highs of 75°F, lows of 59°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.