Cancun weather in September is that time of year when the hottest summer months are behind us and temperatures start to cool a little – just a little!
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Average Stats for Cancun Weather in September
| September weather measure | Imperial / primary figure | Metric equivalent |
|---|---|---|
| Average high | 93.6°F | 34.2°C |
| Average low | 76.3°F | 24.6°C |
| Average temperature | 84.9°F | 29.4°C |
| Monthly rainfall | 7.15 in | 181.5 mm |
| Days with rain | about 15 | — |
| Days with a high above 80°F | about 30 | — |
| Days with a high above 90°F | about 25 | — |
| Average relative humidity* | 82% | — |
| Average wind speed at 10 metres* | 6.0 mph | 9.7 km/h |
Figures use the 1991–2020 SMN normal for Cancún station 23155; days above 80°F and 90°F are derived from its daily September highs.
* Humidity and 10-metre wind are NASA POWER / MERRA-2 modelled estimates for the same place and period.
Compare Cancun Weather by Month
Compare temperatures, rainfall and typical conditions across the whole year.
Temperature in Cancun During September
September is still a very hot and humid climate with an average high of 93.6F and an average low of 76.3F.
Sea temperatures in the waters surrounding Cancun will also be at their peak at this time of year and it is often the case that the ocean will actually be warmer than your hotel pool.
In an average September about 25 of the 30 days have temperatures going beyond 90F and about every day will exceed 80F. Once again these temperatures will feel even hotter than they actually are due to the high humidity which works similar to wind chill in reverse in exaggerating the actual temperature.
Rain and Humidity in Cancun During September
September is the third wettest month of the year with around 7.15 inches (ca. 18.2 cm) of rain in a typical month.
This 7.15 inches (ca. 18.2 cm) of rain typically falls over about 15 days, meaning the other 15 days of the month are typically rain free.
So you can figure out from those statistics that rain can be heavy when it arrives. Those 15 rainy days are likely to be spread fairly evenly throughout the month rather than being one whole period of rain. You’ll be pleased to know a whole-vacation washout remains unlikely.
Average relative humidity in Cancun in September is about 82%. How humid it feels varies with temperature, cloud, breeze and time of day.
Hurricanes in Cancun!
September, along with October, has the highest chance of hurricane formation affecting the area. The oceans to the south and east where hurricanes start their life now have their highest temperatures of the year and create ideal conditions for hurricanes to form.
One should always remember that hurricanes that directly effect the area are still rare occurrences and by no means happen every year. It is however, advisable to take out extra travel insurance when traveling to the Cancun region at this time of year.
September in Cancun
Following the trend from late August occupancy levels tend to continue to drift off since kids are back at school and the Mexican tourist season has largely ended. The month of September with its lower occupancy rates is often joked about by locals as being ‘Septhambre’ a pun on the Spanish word hambre meaning hungry.
Cancun is never ‘dead’ though and facilities such as clubs and bars seldom close because of low season. The lower occupancy rates, however, provide some great opportunities for last minute Cancun hotel deals .
September hotel rates are generally quite low and a fair bit lower than the preceding few months.
September marks the end of whale shark tours in Cancun for the year, so if you want to swim alongside these majestic giants of the sea then September is your last chance until next May when the season starts once again.
Cancun Weather from Month to Month
September