September · Mexico
Best time to visit Cancun in September Weather, crowds & prices
Weather in Cancun in September
Average temperature 28°C, 135 mm of rain, about 25 days with 6+ hours of sunshine and 85% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
7.8/10
Ranked #7 of 12 months
- Avg temp
- 28°C
- Rainfall
- 135 mm
- Humidity
- 85%
- Days with 6h+ sun
- 25
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
September in Cancun scores 7.8/10 for beach and coastal travel - ranked #7 of 12. Expect around 28°C, 135 mm of rain, and roughly 25 days with 6+ hours of sunshine this month.
Cancún’s Caribbean shores and reef excursions shine in the dry winter months from January through March.
September in Cancun: strong conditions, 7th of 12
September averages 28°C (83°F) and humidity near 85%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Monthly rainfall reaches 135 mm — wet for this destination — but about 25 days with 6+ hours of sunshine still break through, so keep one indoor fallback in the plan.
It scores 7.8/10 here, 7th of 12 months, against 9.6/10 in the destination's best month.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
Plan for low-season pricing, with crowds are light for this destination.
Flexible dates? April scores 1.8 points higher here — enough to change the trip.
Frequently asked
- What is the weather like in Cancun in September?
- In September, Cancun averages 28°C, 135 mm of rain, and about 25 days with 6+ hours of sunshine. Its climate-comfort score is 7.8/10.
- Is September a good time to visit Cancun?
- September earns a 7.8/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Cancun in September?
- Expect about 135 mm of rain in September. Average humidity is 85% and there are about 25 days with 6+ hours of sunshine.
Curated in Cancun
Tickets & experiences
Things to do in Cancun
Cancun, Mexico. Live activities and tours from GetYourGuide, matched to this destination.