Cancun weather in September 2025

Expect daytime maximum temperatures of 32°C in Cancun, Mexico's Caribbean Coast in September and very high heat and humidity based on long-term weather averages. There are 6 hours of sunshine per day on average with 14 days with some rainfall and typically 229 mm of rainfall in the month.

  • 32°C maximum daytime temperature in September in Cancun32
    32°C max day temperature
  • 6 hours of sunshine per day
  • 14 days with some rainfall in September in Cancun14
    14 days with some rainfall
  • 23°C minimum night-time temperature in September in Cancun23
    23°C min night temperature
  • 12 hours of daylight per day in September in Cancun12
    12 hours of daylight per day
  • Very high heat & humidity in September in CancunVH
    Very High heat & humidity
  • 229 mm monthly rainfall in September in Cancun229
    229 mm of monthly rainfall
  • UV (maximum) index 11 (Extreme) in September in Cancun11
    11 (Extreme) UV index
  • 29°C sea temperature in September in Cancun29
    29°C sea temperature

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The September weather guide for Mexico's Caribbean Coast (Cancun) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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More about Mexico's Caribbean Coast

How hot is it in Cancun in September?

Daytime temperatures usually reach 32°C in Cancun in September with very high heat and humidity, falling to 23°C at night.

How sunny is it in Cancun in September?

There are normally 6 hours of bright sunshine each day in Cancun in September - that's 51% of daylight hours.

How warm is the sea around Cancun in September?

The average sea temperature around Cancun in September is 29°C.

Does it rain in Cancun in September?

There are usually 14 days with some rain in Cancun in September and the average monthly rainfall is 229mm.

What is the chance of a hurricane in Cancun in September?

On average 1.2 days in September in Cancun are likely to be affected by the passage of one or more tropical storms.

Cancun September sunrise & sunset times

Browse the sunrise and sunset times for Cancun in September 2025. Select a month to view Cancun sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:31 19:03
Monday, 15th September 2025 06:35 18:50
Tuesday, 30th September 2025 06:38 18:36

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