Seoul vs Hong Kong

Based on sunshine hours, rain days, comfortable temperatures, and humidity levels, Seoul edges ahead as the better destination in September. Seoul offers 9 hours of daily sunshine with only 8 rain days, while Hong Kong sees 10 sunshine hours and 17 rain days.

Seoul sits in the comfortable travel range at 25°C. Hong Kong runs hot at 29°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.

Seoul reaches an average high of 25°C (77°F) and drops to 16°C (61°F) at night during September. The daily temperature range is 9°C, meaning moderate variation throughout the day.

Hong Kong averages 29°C (84°F) for the high and 25°C (77°F) for the low, with a daily range of 4°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.

Seoul receives approximately 123 mm of rainfall across 8 rain days during September. You can expect rain roughly every other day.

Hong Kong sees 215 mm over 17 rain days. That makes Seoul the drier option by 9 rain days and 92 mm of total precipitation.

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