Pack or skip
Sunscreen for São Paulo in December
Verdict
Pack it
Sun still finds you at 80°F — UV doesn't care about temperature.
Why
São Paulo in December averages highs of 80°F, lows of 65°F, 14 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.