Pack or skip
Sunscreen for Washington DC in August
Verdict
Pack it
Sun still finds you at 88°F — UV doesn't care about temperature.
Why
Washington DC in August averages highs of 88°F, lows of 71°F, 9 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.