Pack or skip
Insect repellent for Seoul in September
Verdict
Pack it
Warm (79°F) plus 10 rainy days = mosquito conditions.
Why
Seoul in September averages highs of 79°F, lows of 63°F, 10 rainy days.
That climate means insect repellent earns its space in the bag. Warm (79°F) plus 10 rainy days = mosquito conditions.