Pack or skip
Sunscreen for Cartagena in December
Verdict
Pack it
Sun still finds you at 85°F — UV doesn't care about temperature.
Why
Cartagena in December averages highs of 85°F, lows of 75°F, 3 rainy days.
That climate means sunscreen earns its space in the bag. Sun still finds you at 85°F — UV doesn't care about temperature.