Bucharest vs Istanbul

Bucharest and Istanbul 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.

Bucharest sits in the comfortable travel range at 23°C. Istanbul is also comfortable at 22°C.

For travelers who prioritize dry weather, Istanbul is the stronger choice in September. Bucharest receives 6 more hours of sunshine per day, which matters for sightseeing and outdoor activities.

Bucharest reaches an average high of 23°C (73°F) and drops to 14°C (57°F) at night during September. The daily temperature range is 9°C, meaning moderate variation throughout the day.

Istanbul averages 22°C (72°F) for the high and 13°C (55°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 September.

Bucharest receives approximately 61 mm of rainfall across 7 rain days during September. Rain is occasional, so a light rain jacket should suffice.

Istanbul sees 45 mm over 4 rain days. That makes Istanbul the drier option by 3 rain days and 16 mm of total precipitation.

Both cities share similar humidity levels at 65%.