Pack or skip
Sunscreen for Cartagena in September
Verdict
Pack it
Sun still finds you at 86°F — UV doesn't care about temperature.
Why
Cartagena in September averages highs of 86°F, lows of 77°F, 6 rainy days.
That climate means sunscreen earns its space in the bag. Sun still finds you at 86°F — UV doesn't care about temperature.