Pack or skip
Sunscreen for New York in September
Verdict
Pack it
Sun still finds you at 76°F — UV doesn't care about temperature.
Why
New York in September averages highs of 76°F, lows of 61°F, 9 rainy days.
That climate means sunscreen earns its space in the bag. Sun still finds you at 76°F — UV doesn't care about temperature.