Hong Kong vs Seoul

Based on sunshine hours, rain days, comfortable temperatures, and humidity levels, Seoul edges ahead as the better destination in September. Seoul offers 8 hours of daily sunshine with only 8 rain days, while Hong Kong sees 9 sunshine hours and 17 rain days.

Hong Kong can feel quite hot at 29°C, so plan for heat. Seoul is also comfortable at 25°C.

For travelers who prioritize dry weather, Seoul is the stronger choice in September. Hong Kong receives 1 more hour of sunshine per day, which matters for sightseeing and outdoor activities.

Hong Kong reaches an average high of 29°C (84°F) and drops to 25°C (77°F) at night during September. The daily temperature range is 4°C, meaning relatively stable temperatures from day to night.

Seoul averages 25°C (77°F) for the high and 16°C (61°F) for the low, with a daily range of 9°C. The 4°C difference is noticeable but not dramatic.

Both cities are in the Northern Hemisphere, so they share the same seasonal pattern in September.

Hong Kong receives approximately 215 mm of rainfall across 17 rain days during September. Rain is frequent, so waterproof gear is essential.

Seoul sees 123 mm over 8 rain days. That makes Seoul the drier option by 9 rain days and 92 mm of total precipitation.

Humidity also differs: Hong Kong averages 78% while Seoul sits at 65%. Hong Kong will feel muggier, especially at higher temperatures.