Cancun vs Sydney

Based on sunshine hours, rain days, comfortable temperatures, and humidity levels, Sydney edges ahead as the better destination in September. Sydney offers 4 hours of daily sunshine with only 4 rain days, while Cancun sees 4 sunshine hours and 12 rain days.

Cancun can feel quite hot at 30°C, so plan for heat. Sydney is also comfortable at 16°C.

For travelers who prioritize dry weather, Sydney is the stronger choice in September.

Cancun reaches an average high of 30°C (86°F) and drops to 23°C (73°F) at night during September. The daily temperature range is 7°C, meaning relatively stable temperatures from day to night.

Sydney averages 16°C (61°F) for the high and 8°C (46°F) for the low, with a daily range of 8°C. There is a notable 14°C gap between the two cities, so expect a very different feel.

Cancun is in the Northern Hemisphere while Sydney is in the Southern Hemisphere. This means they experience opposite seasons, which explains any large temperature difference.

Cancun receives approximately 140 mm of rainfall across 12 rain days during September. You can expect rain roughly every other day.

Sydney sees 50 mm over 4 rain days. That makes Sydney the drier option by 8 rain days and 90 mm of total precipitation.

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