Istanbul vs Cancun

Based on sunshine hours, rain days, comfortable temperatures, and humidity levels, Istanbul edges ahead as the better destination in September. Istanbul offers 4 hours of daily sunshine with only 4 rain days, while Cancun sees 10 sunshine hours and 24 rain days.

Istanbul sits in the comfortable travel range at 22°C. Cancun runs hot at 29°C.

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

Istanbul reaches an average high of 22°C (72°F) and drops to 13°C (55°F) at night during September. The daily temperature range is 9°C, meaning moderate variation throughout the day.

Cancun averages 29°C (84°F) for the high and 26°C (79°F) for the low, with a daily range of 3°C. There is a notable 7°C gap between the two cities, so expect a very different feel.

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

Istanbul receives approximately 45 mm of rainfall across 4 rain days during September. Rain is occasional, so a light rain jacket should suffice.

Cancun sees 205 mm over 24 rain days. That makes Istanbul the drier option by 20 rain days and 160 mm of total precipitation.

Humidity also differs: Istanbul averages 65% while Cancun sits at 78%. Cancun will feel muggier, especially at higher temperatures.