Pack or skip
Insect repellent for Washington DC in October
Verdict
Pack it
Warm (70°F) plus 8 rainy days = mosquito conditions.
Why
Washington DC in October averages highs of 70°F, lows of 52°F, 8 rainy days.
That climate means insect repellent earns its space in the bag. Warm (70°F) plus 8 rainy days = mosquito conditions.