Oslo vs Copenhagen

Oslo and Copenhagen 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.

Oslo sits in the comfortable travel range at 16°C. Copenhagen is also comfortable at 17°C.

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

Oslo reaches an average high of 16°C (61°F) and drops to 9°C (48°F) at night during September. The daily temperature range is 7°C, meaning relatively stable temperatures from day to night.

Copenhagen averages 17°C (63°F) for the high and 12°C (54°F) for the low, with a daily range of 5°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.

Oslo receives approximately 87 mm of rainfall across 11 rain days during September. You can expect rain roughly every other day.

Copenhagen sees 57 mm over 11 rain days. Both cities are equally rainy this month.

Both cities share similar humidity levels at 65%.