Cozumel weather in September 2025

Expect 32°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Cozumel in September. Check more long-term weather averages for Cozumel in September before you book your next holiday to Mexico's Caribbean Coast in 2025/2026.

  • 32°C maximum daytime temperature in September in Cozumel32
    32°C max day temperature
  • 6 hours of sunshine per day
  • 15 days with some rainfall in September in Cozumel15
    15 days with some rainfall
  • 23°C minimum night-time temperature in September in Cozumel23
    23°C min night temperature
  • 12 hours of daylight per day in September in Cozumel12
    12 hours of daylight per day
  • Very high heat & humidity in September in CozumelVH
    Very High heat & humidity
  • 237 mm monthly rainfall in September in Cozumel237
    237 mm of monthly rainfall
  • UV (maximum) index 11 (Extreme) in September in Cozumel11
    11 (Extreme) UV index
  • 29°C sea temperature in September in Cozumel29
    29°C sea temperature

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The September weather guide for Mexico's Caribbean Coast (Cozumel) 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 Cozumel in September?

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

How sunny is it in Cozumel in September?

There are normally 6 hours of bright sunshine each day in Cozumel in September - that's 50% of daylight hours.

How warm is the sea around Cozumel in September?

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

Does it rain in Cozumel in September?

There are usually 15 days with some rain in Cozumel in September and the average monthly rainfall is 237mm.

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

On average 1.3 days in September in Cozumel are likely to be affected by the passage of one or more tropical storms.

Cozumel September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:32 19:03
Monday, 15th September 2025 06:35 18:50
Tuesday, 30th September 2025 06:39 18:36

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