London vs Cologne

London and Cologne are closely matched in May. 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 17°C. Cologne is also comfortable at 18°C.

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

London reaches an average high of 17°C (63°F) and drops to 8°C (46°F) at night during May. The daily temperature range is 9°C, meaning moderate variation throughout the day.

Cologne averages 18°C (64°F) for the high and 9°C (48°F) for the low, with a daily range of 9°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 May.

London receives approximately 52 mm of rainfall across 10 rain days during May. You can expect rain roughly every other day.

Cologne sees 63 mm over 12 rain days. That makes London the drier option by 2 rain days and 11 mm of total precipitation.

Both cities share similar humidity levels at 65%.