Pack or skip
Insect repellent for Seoul in October
Verdict
Pack it
Warm (66°F) plus 7 rainy days = mosquito conditions.
Why
Seoul in October averages highs of 66°F, lows of 50°F, 7 rainy days.
That climate means insect repellent earns its space in the bag. Warm (66°F) plus 7 rainy days = mosquito conditions.