Monthly climate guide
Cancún weather in September
With highs near 30°C (86°F) and lows around 27°C (80°F), September feels hot in Cancún. Rainfall averages about 176 mm (very wet) and the sky is often cloudy. Daytime highs are about the same as August and about the same as October.
What stands out in September
- September falls in Cancún's wetter season, when heavy showers are common.
- It's wetter than a typical month in Cancún — roughly 56% more rain than average.
- Days and nights are close, only about 3°C apart.
- It's humid — around 83% — so the heat feels heavier.
Avg high
30°C
86°F
Avg low
27°C
80°F
Rainfall
176 mm
very wet
Humidity
83%
relative
Sky
59%
cloud · often cloudy
Cancún weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 27°C / 80°F | 22°C / 72°F | 82 mm | 77% | 54% |
| February | 27°C / 81°F | 23°C / 73°F | 47 mm | 76% | 39% |
| March | 28°C / 83°F | 23°C / 74°F | 39 mm | 73% | 37% |
| April | 30°C / 86°F | 25°C / 76°F | 39 mm | 73% | 35% |
| May | 30°C / 87°F | 26°C / 78°F | 90 mm | 75% | 43% |
| June | 30°C / 85°F | 26°C / 79°F | 218 mm | 83% | 61% |
| July | 30°C / 86°F | 27°C / 80°F | 72 mm | 81% | 49% |
| August | 31°C / 87°F | 27°C / 80°F | 123 mm | 81% | 55% |
| September | 30°C / 86°F | 27°C / 80°F | 176 mm | 83% | 59% |
| October | 29°C / 84°F | 26°C / 78°F | 253 mm | 83% | 59% |
| November | 28°C / 82°F | 24°C / 75°F | 135 mm | 80% | 51% |
| December | 27°C / 81°F | 23°C / 74°F | 76 mm | 79% | 48% |
What to pack for September
- Light, breathable clothing (cotton or linen)
- A sun hat and high-SPF sunscreen
- A refillable water bottle
- A compact umbrella or packable rain jacket
- Water-resistant shoes
- Quick-dry fabrics — it feels stickier than the temperature suggests
Is September a good time to visit Cancún?
Our Cancún guide recommends: December to April, in the dry season and outside the June–November hurricane season.
Chichén Itzá and Tulum are both feasible day trips from Cancún — book an early departure to avoid the worst of the midday heat and crowds.
Best time to visit Cancún →Other Mexico cities in September
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Cancún weather in September. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/mexico/cancun/september
<a href="https://weathercompare.eu/weather/mexico/cancun/september">Cancún weather in September</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/mexico/cancun" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Cancún weather in September"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/mexico/cancun/september">Cancún weather in September</a> – WeatherCompare</p>
Cancún in September: quick answers
Is September a good time to visit Cancún?
September is one of the wetter months in Cancún, with about 176 mm of rain. You can still go: pack a rain jacket and keep plans flexible.
How warm is Cancún in September?
Average highs are about 30°C (86°F) and average lows about 27°C (80°F), based on 10 years of daily data.
Does it rain a lot in Cancún in September?
Cancún typically gets around 176 mm of rain in September — very wet.
When is the best time to visit Cancún?
December to April, in the dry season and outside the June–November hurricane season.
Figures are long-term averages for the area around Cancún (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.