Pack or skip
Sunglasses for Washington DC in September
Verdict
Pack it
Highs around 79°F — plenty of daylight glare.
Why
Washington DC in September averages highs of 79°F, lows of 62°F, 6 rainy days.
That climate means sunglasses earns its space in the bag. Highs around 79°F — plenty of daylight glare.