Pack or skip
Sunscreen for Washington DC in May
Verdict
Pack it
Sun still finds you at 74°F — UV doesn't care about temperature.
Why
Washington DC in May averages highs of 74°F, lows of 55°F, 7 rainy days.
That climate means sunscreen earns its space in the bag. Sun still finds you at 74°F — UV doesn't care about temperature.