Cancún Weather in September
Cancún in September sees very high daytime temperatures of 30°C (86°F) and nighttime lows of 26°C (79°F). Rainfall is fairly high this month at around 192 mm (7.6 in), so pack a rain jacket to stay dry.
Rainfall in Cancún in September
Typically, you can expect about 14 days of rain this month, with 192 mm (7.6 in) on average. Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.
Temperature in Cancún in September
In September, Cancún sees very high temperatures, with highs of 30°C (86°F). Nights drop to around 26°C (79°F). Sunshine and humidity can make it feel even warmer than the raw temperature suggests. With lows of 26°C (79°F), it stays warm throughout the night. A cold shower before going to sleep is one of the easiest ways to cool down before bed.
Sunshine in Cancún in September
Expect sunny days throughout the month, with an estimated 195 hours of sunshine. This makes it a pleasant time to visit Cancún.
Average water temperature in September
With water at 29°C (84°F), conditions are warm and calm. Perfect for those who like tropical water temperatures, though it won't cool you down much.September in Cancún can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Mexico, check out our Cancún's climate page.
Cancún Temperature in September
Min Temperature
26°C (79°F)
Max Temperature
30°C (86°F)
Water Temperature
29°C (84°F)
Chance of Rain
48%
Precipitation
192 mm (7.6 in)
Rainy days
14 days
Sunshine
195 hours
Percentage Sunshine
Daily Historical Temperatures
48-year average (1976-2025)
Based on our historical records, temperatures in Cancún typically stay consistent throughout September, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 24°C (75°F).
Average temperatures in September
Historical weather for Cancún in September
Browse day-by-day weather records for Cancún spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Cancún historical weather extremes in September
According to our 36 years of weather records for Cancún, the following extremes were recorded between 1989 and 2025.
- On September 18, 2002, temperatures climbed to 39°C (102°F), marking the warmest September day on record.
- The lowest daytime temperature in September was 26°C (79°F), recorded on September 17, 1993.
- The lowest overnight temperature recorded in September was 17°C (63°F) (September 27, 2001).
Best Places in Mexico in September
Find out more about the weather in Mexico and which places have the best travel conditions in this month. See all of Mexico in September →
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What to Wear in Cancún in September
Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! Expect water temperatures of around 29°C (84°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Cancún in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Mexico, check out our Cancún's climate page.
Temperature Rainfall Sunshine Water Temp
See the full Cancún climate overview or explore weather in Mexico.
