London vs Tokyo

Based on sunshine hours, rain days, comfortable temperatures, and humidity levels, London edges ahead as the better destination in September. London offers 8 hours of daily sunshine with only 9 rain days, while Tokyo sees 8 sunshine hours and 14 rain days.

London sits in the comfortable travel range at 19°C. Tokyo is also comfortable at 26°C.

For travelers who prioritize dry weather, London is the stronger choice in September.

London reaches an average high of 19°C (66°F) and drops to 11°C (52°F) at night during September. The daily temperature range is 8°C, meaning moderate variation throughout the day.

Tokyo averages 26°C (79°F) for the high and 20°C (68°F) for the low, with a daily range of 6°C. There is a notable 7°C gap between the two cities, so expect a very different feel.

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

London receives approximately 48 mm of rainfall across 9 rain days during September. You can expect rain roughly every other day.

Tokyo sees 189 mm over 14 rain days. That makes London the drier option by 5 rain days and 141 mm of total precipitation.

Both cities share similar humidity levels at 65%.