Pack or skip
Insect repellent for Busan in October
Verdict
Pack it
Warm (69°F) plus 7 rainy days = mosquito conditions.
Why
Busan in October averages highs of 69°F, lows of 56°F, 7 rainy days.
That climate means insect repellent earns its space in the bag. Warm (69°F) plus 7 rainy days = mosquito conditions.