Mexico
Cancún in September: weather, sea & travel advice
This month's data profile
Rain shapes the decision
Cancún in September is climatically mixed. The average daily high is around 30 °C, and the sea is about 29 °C. With about 24 rainy days it is very wet.
Historical monthly averages, not a weather forecast. Individual days and years can differ substantially.
Rank among 12 monthly averages
53/100 · #11
Warmth
#4
Dryness
#12
Sun
#7
Sea warmth
#1
Published best categories: none
Cancún · SeptemberPhoto: Luka Peternel · CC BY-SA 4.0Climate facts
- Average high
- 30 °C
- Average low
- 27 °C
- Sea
- 29 °C
- Rainy days (est.)
- 24 rainy days (est.)
- Sun (est.)
- 7 h/day
- Humidity
- 82 %
Climate evidence with direct month comparison
The highlighted row is the selected month. Precipitation total and rainy days are separate monthly averages.
| Month | Avg high °C | Avg low °C | Rainy days (est.) | Precipitation mm | Sun h/day (est.) | Humidity % | Wind m/s | Sea °C | Score |
|---|---|---|---|---|---|---|---|---|---|
| August | 31 | 27 | 21 | 120 | 7.9 | 80 | 1.9 | 29 | 52 |
| September (selected) | 30 | 27 | 24 | 175 | 6.9 | 82 | 1.9 | 29 | 53 |
| October | 29 | 26 | 21 | 198 | 5.9 | 82 | 2.3 | 29 | 57 |
How do the previous and next months compare?
Baseline: September (53/100)
Positive and negative values show the change from the selected month.
| Score Δ | Average high Δ | Average low Δ | Rainy days Δ | Rain Δ | Sun Δ | Humidity Δ | Wind Δ | Sea Δ | |
|---|---|---|---|---|---|---|---|---|---|
| August | -1 | +0.6 °C | +0.2 °C | -2.5 | -54.5 mm | +1 h | -2.3 % | ±0 m/s | -0.1 °C |
| October | +4 | -1.1 °C | -0.9 °C | -2.7 | +23.4 mm | -1 h | ±0 % | +0.3 m/s | -0.3 °C |
All twelve months in context
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Useful next decisions
Frequently asked questions
How warm is Cancún in September?
The average daily high is around 30 °C, with an average daily low of about 27 °C.
Can you swim in Cancún in September?
The sea is about 29 °C (very warm).
Does it rain a lot in Cancún in September?
The curated estimate is about 24 rainy days per month, not a directly measured long-term average. Total precipitation averages around 175 mm for the month. A rainy day does not mean all-day rain.
When is the best time to visit Cancún?
By the climate score, January, February, March and April are the strongest months for Cancún. For a beach trip: January, February, March and April. September is not among them.