Pack or skip
Sunscreen for Mexico City in December
Verdict
Pack it
Sun still finds you at 71°F — UV doesn't care about temperature.
Why
Mexico City in December averages highs of 71°F, lows of 45°F, 3 rainy days.
That climate means sunscreen earns its space in the bag. Sun still finds you at 71°F — UV doesn't care about temperature.