Pack or skip
Insect repellent for Boston in September
Verdict
Pack it
Warm (74°F) plus 8 rainy days = mosquito conditions.
Why
Boston in September averages highs of 74°F, lows of 59°F, 8 rainy days.
That climate means insect repellent earns its space in the bag. Warm (74°F) plus 8 rainy days = mosquito conditions.