Pack or skip
Sunscreen for Washington DC in July
Verdict
Pack it
Sun still finds you at 88°F — UV doesn't care about temperature.
Why
Washington DC in July averages highs of 88°F, lows of 70°F, 7 rainy days.
That climate means sunscreen earns its space in the bag. Sun still finds you at 88°F — UV doesn't care about temperature.