September weather forecast and climate
Cancún, Mexico

White buildings on the white sandy beach in sharp contrast of the clear blue waters on a beach in Cancún, Mexico
White buildings on the white sandy beach in sharp contrast of the clear blue waters on a beach in Cancún, Mexico
The power of the sun brings in a scorching 33°C (91.4°F) of heat; Moreover, the 14 days of a heavy downpour produces 353.1mm (13.9") of rain, creating a hot and damp atmosphere.
However, the sea temperature of 29°C (84.2°F) brings relief to a tacky feeling from the excessive moisture. Take advantage of the 9 hours of sunshine by partaking in vibrant cultural events. Enjoy a stroll, a wind breeze of 17.4km/h (10.8mph) is very refreshing.

What is the temperature in September in Cancún?

In Cancún, in September, the average high-temperature is 33.7°C (92.7°F), and the average low-temperature is 24.3°C (75.7°F).

How many days does it rain in September in Cancún?

In Cancún, Mexico, during September, the rain falls for 14 days and regularly aggregates up to 181.9mm (7.2") of precipitation.

How warm is the water in September in Cancún?

In September, the average sea temperature is 29.3°C (84.7°F). For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.
Average temperature in September - Cancún, Mexico
  • Average high temperature in September: 33.7°C

The warmest month (with the highest average high temperature) is August (34.8°C).
The month with the lowest average high temperature is January (28.3°C).

  • Average low temperature in September: 24.3°C

The month with the highest average low temperature is July (24.8°C).
The coldest month (with the lowest average low temperature) is January (19.8°C).

Average rainfall in September - Cancún, Mexico
  • Average rainfall in September: 181.9mm

The wettest month (with the highest rainfall) is October (271.9mm).
The driest month (with the lowest rainfall) is April (41.2mm).

Average rainfall days in September - Cancún, Mexico
  • Average rainfall days in September: 14 days

The month with the highest number of rainy days is October (16.4 days).
The month with the lowest number of rainy days is April (4.1 days).

Average sea temperature in September - Cancún, Mexico
  • Average sea temperature in September: 29.3°C

The best month for swimming (with the highest average sea temperature) is August (29.4°C).
The coldest month (with the lowest average sea temperature) is January (25.6°C).

Average daylight in September / Average sunshine in September - Cancún, Mexico
  • Average daylight in September: 12.3h

The month with the longest days is June (Average daylight: 13.4h).
The month with shortest days is December (Average daylight: 10.9h).

  • Average sunshine in September: 6h

Months with most sunshine are March, April and May (Average sunshine: 8h).
Months with least sunshine are January, September, November and December (Average sunshine: 6).

Average UV index in September - Cancún, Mexico
  • Average UV index in September: 11

Months with the highest UV index are April, May, June, July and August (UV index 12).
Months with the lowest UV index are January and December (UV index 7).

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