The climate in Cancún during September can be summarized as hot, humid and very wet.
September is in the fall / autumn in Cancún and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a steamy 32°C (89°F), whilst at night 23°C (73°F) is normal.
|Daytime temperature||31.8°C 89.2°F|
|Nightly temperature||22.7°C 72.8°F|
|Average temperature||27.2°C 81°F|
|Daily sunshine||6.7 hrs|
|Avg rainfall||224 mm 8.8 ins|
|Rainy days||14 days|
|Sea temperature||29.1°C 84.5°F|
|Windspeed||9.4kph 6 mph|
On average September is the wettest month of the year in Cancún with around 224mm 8.8 inches of rain making it a very wet time to visit. This rainfall is typically spread over 14 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.7 hours of sunshine per day.
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Cancún in September 2021.
|Hottest month:||August||32.5°C 90.5°F|
|Driest month:||March||36mm 1.4ins|
|Coldest month:||January||27.3°C 81.1°F|
|Wettest month:||September||224mm 8.8ins|