Istanbul vs Bucharest

Based on sunshine hours, rain days, comfortable temperatures, and humidity levels, Istanbul edges ahead as the better destination in May. Istanbul offers 12 hours of daily sunshine with only 6 rain days, while Bucharest sees 12 sunshine hours and 11 rain days.

Istanbul sits in the comfortable travel range at 20°C. Bucharest is also comfortable at 23°C.

For travelers who prioritize dry weather, Istanbul is the stronger choice in May.

Istanbul reaches an average high of 20°C (68°F) and drops to 13°C (55°F) at night during May. The daily temperature range is 7°C, meaning relatively stable temperatures from day to night.

Bucharest averages 23°C (73°F) for the high and 12°C (54°F) for the low, with a daily range of 11°C. The 3°C difference is noticeable but not dramatic.

Both cities are in the Northern Hemisphere, so they share the same seasonal pattern in May.

Istanbul receives approximately 37 mm of rainfall across 6 rain days during May. Rain is occasional, so a light rain jacket should suffice.

Bucharest sees 71 mm over 11 rain days. That makes Istanbul the drier option by 5 rain days and 34 mm of total precipitation.

Both cities share similar humidity levels at 65%.