01Weather
Cancún weather in September
Afternoons in September average 31.6 °C (89 °F) and nights cool to 24.3 °C (76 °F). Compared with August it is 0.6 °C cooler; October is 1.1 °C cooler again.
What the averages hide
| In a typical September | Value | What it means |
|---|---|---|
| Warm afternoons (90th percentile) | 33 °C / 91 °F | one day in ten is at least this warm |
| Cool afternoons (10th percentile) | 30 °C / 86 °F | one day in ten stays below this |
| Cold nights (10th percentile) | 23 °C / 73 °F | one night in ten is colder than this |
| Days above 30 °C (86 °F) | 29.0 | per month, average 2016–2025 |
| Nights at or below 0 °C (32 °F) | 0.0 | frost mornings per month |
| Hottest / coldest September day 2016–2025 | 36.0 °C / 21.0 °C | extremes in the ten-year record |
02Daylight
Sunrise, sunset and the length of the day
| Date | Sunrise | Sunset | Daylight |
|---|---|---|---|
| 1 September | 06:31 | 19:03 | 12.5 h |
| 15 September | 06:34 | 18:50 | 12.3 h |
| 30 September | 06:38 | 18:36 | 12.0 h |
Daylight shrinks by about 30 minutes over the month. Times are local (America/Cancun).
03Crowds
How busy Cancún is in September
quiet The main sights are quiet in September. What drives it:
- peak hurricane month
- wettest month
- lowest rates
04Public holidays
Public holidays in September 2027
| Date | Holiday |
|---|---|
| 16 Sep 2027 | Independence Day |
On public holidays many shops close and museums run on Sunday hours; check opening times for the day before and after as well.
05Events
What's on in Cancún in September
Every year in September
| Event | When | Type |
|---|---|---|
| Independence Day | 15–16 September, El Grito | national |
07Packing
What to pack for Cancún in September
- light, breathable clothing
- sun hat and sunscreen
- refillable water bottle
- a compact umbrella for occasional showers
- something for heat: 29 days a month pass 30 °C on average
08Editor's notes
What the numbers don't tell you
September is the wettest month, with rain on about twenty days, and the peak of hurricane season, with the lowest occupancy and prices of the year. Afternoons average 32 °C. Independence Day on 15 and 16 September brings the Grito ceremony and fiestas downtown. Many restaurants and attractions reduce hours. Travel insurance is essential if you book, and refundable rates are the rule.
The sea is around 29 °C. The sargassum season ends. The whale sharks leave by mid-month. The Isla Mujeres and Holbox hotels offer their deepest discounts. Daylight passes twelve hours at the equinox. For the gradual drying, the Day of the Dead preparations and the late-October window, see October.
09Compare
Cancún month by month
| Month | High | Low | Rain days | Sun h | Crowds | Verdict |
|---|---|---|---|---|---|---|
| January | 27 °C | 20 °C | – | – | very busy | Good |
| February | 28 °C | 21 °C | – | – | very busy | Good |
| March | 29 °C | 22 °C | – | – | very busy | Good |
| April | 30 °C | 23 °C | – | – | busy | Good |
| May | 31 °C | 25 °C | – | – | moderate | Good |
| June | 31 °C | 26 °C | – | – | moderate | Good |
| July | 32 °C | 25 °C | – | – | busy | Good |
| August | 32 °C | 25 °C | – | – | moderate | Good |
| September | 32 °C | 24 °C | – | – | quiet | Good |
| October | 30 °C | 24 °C | – | – | quiet | Good |
| November | 29 °C | 22 °C | – | – | busy | Excellent |
| December | 28 °C | 21 °C | – | – | very busy | Good |
Not sure about September? See the best time to visit Cancún.
10Elsewhere
September in nearby cities
| City | High | Rain days |
|---|---|---|
| Miami in September | 32 °C | 15 |
| Orlando in September | 32 °C | 9 |
| New York City in September | 26 °C | 6 |
| Toronto in September | 23 °C | 8 |
| Las Vegas in September | 35 °C | 0 |
| Los Angeles in September | 26 °C | 0 |
11FAQ
Cancún in September: your questions
Is September a good time to visit Cancún?
September is a good month to visit Cancún. Daytime highs average 32 °C (89 °F), and hotel arrivals run above the yearly average, so the main sights are quiet.
What is the weather like in Cancún in September?
Expect hot days around 32 °C (89 °F) and nights near 24 °C (76 °F). One September in ten brings afternoons above 33 °C, and one in ten stays below 30 °C.
Does it rain a lot in Cancún in September?
September in Cancún, by the 1991–2020 station normals.
What should I wear in Cancún in September?
Pack light, breathable clothing, sun hat and sunscreen, refillable water bottle.
Is Cancún crowded in September?
The main sights are quiet in September. Main drivers: peak hurricane month; wettest month; lowest rates.
What time does it get dark in Cancún in September?
Around the middle of September the sun sets at about 18:50 and rises at 06:34, giving 12.3 hours of daylight.