Copenhagen vs Oslo

Copenhagen and Oslo 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.

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

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

Copenhagen reaches an average high of 17°C (63°F) and drops to 12°C (54°F) at night during September. The daily temperature range is 5°C, meaning relatively stable temperatures from day to night.

Oslo averages 16°C (61°F) for the high and 9°C (48°F) for the low, with a daily range of 7°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.

Copenhagen receives approximately 57 mm of rainfall across 11 rain days during September. You can expect rain roughly every other day.

Oslo sees 87 mm over 11 rain days. Both cities are equally rainy this month.

Both cities share similar humidity levels at 65%.