Seoul in September
Summer starts to fade
- Temperature
- 16–25°C
- Crowds
- Moderate-High
- Prices
- $$$$
+Improving temperatures and humidity
–Early September can still feel hot
September gradually becomes cooler and more comfortable as summer humidity eases.
Seoul vs Tokyo in September
Seoul edges it in September. Seoul averages 16–25°C with moderate-high crowds; Tokyo 20–28°C with low-moderate crowds.
By Daan · Last reviewed October 2026
Seoul and Tokyo
The verdict for September
- WeatherSeoul has the better weather8/10 vs 6/10
- CrowdsTokyo is quieterModerate-High vs Low-Moderate
- PricesTokyo is cheaper$$$$ vs $$$
- OverallSeoul comes out ahead6.5/10 vs 6/10
Tokyo in September
Cooling, but typhoon risk
- Temperature
- 20–28°C
- Crowds
- Low-Moderate
- Prices
- $$$
+Heat eases through the month and crowds thin out.
–Typhoon season can cancel flights and day trips.
Late September delivers most of October's upside for less.
Scores and crowd levels are my own judgement; temperatures are monthly averages. Higher scores are better: quieter, cheaper and more pleasant.
Another month