Pack or skip
Insect repellent for Baltimore in September
Verdict
Pack it
Warm (78°F) plus 8 rainy days = mosquito conditions.
Why
Baltimore in September averages highs of 78°F, lows of 58°F, 8 rainy days.
That climate means insect repellent earns its space in the bag. Warm (78°F) plus 8 rainy days = mosquito conditions.