Istanbul vs Bucharest

Based on sunshine hours, rain days, comfortable temperatures, and humidity levels, Istanbul edges ahead as the better destination in September. Istanbul offers 11 hours of daily sunshine with only 7 rain days, while Bucharest sees 9 sunshine hours and 7 rain days.

Istanbul sits in the comfortable travel range at 24°C. Bucharest is also comfortable at 23°C.

For travelers who prioritize dry weather, both cities are equally dry in September. Istanbul receives 2 more hours of sunshine per day, which matters for sightseeing and outdoor activities.

Istanbul reaches an average high of 24°C (75°F) and drops to 18°C (64°F) at night during September. The daily temperature range is 6°C, meaning relatively stable temperatures from day to night.

Bucharest averages 23°C (73°F) for the high and 14°C (57°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.

Istanbul receives approximately 46 mm of rainfall across 7 rain days during September. Rain is occasional, so a light rain jacket should suffice.

Bucharest sees 61 mm over 7 rain days. Both cities are equally rainy this month.

Both cities share similar humidity levels at 65%.