Cancun weather in September 2025

Expect 90°F daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Cancun in September. Check more long-term weather averages for Cancun in September before you book your next holiday to Mexico's Caribbean Coast in 2025/2026.

  • 90°F maximum daytime temperature in September in Cancun90
    90°F max day temperature
  • 6 hours of sunshine per day
  • 14 days with some rainfall in September in Cancun14
    14 days with some rainfall
  • 73°F minimum night-time temperature in September in Cancun73
    73°F 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
  • 9.0 inches monthly rainfall in September in Cancun9.0
    9.0 inches of monthly rainfall
  • UV (maximum) index 11 (Extreme) in September in Cancun11
    11 (Extreme) UV index
  • 84°F sea temperature in September in Cancun84
    84°F 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)  |  Imperial (°F)

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More about Mexico's Caribbean Coast

How hot is it in Cancun in September?

Daytime temperatures usually reach 90°F in Cancun in September with very high heat and humidity, falling to 73°F 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 84°F.

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 9.0 inches.

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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