London vs Luxembourg City

London and Luxembourg City are closely matched in September. Neither city has a clear advantage across all metrics. Your decision should come down to personal preference, cultural interests, and travel logistics rather than weather alone.

London sits in the comfortable travel range at 19°C. Luxembourg City is also comfortable at 18°C.

For travelers who prioritize dry weather, both cities are equally dry 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.

Luxembourg City averages 18°C (64°F) for the high and 10°C (50°F) for the low, with a daily range of 8°C. The two cities feel quite similar in terms of temperature.

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.

Luxembourg City sees 61 mm over 9 rain days. Both cities are equally rainy this month.

Both cities share similar humidity levels at 65%.