Weather in Cancún in September
September in Cancún is warm with average temperatures around 28.3°C (82.9°F). Expect significant rainfall with 166mm across approximately 24 days.
Data Note: Temperature values are 2001–2020 satellite/reanalysis grid averages from NASA POWER and may differ from airport station normals by a few degrees.
Temperature
High
30.0°C
86.0°F
Low
26.5°C
79.7°F
Precipitation
166 mm
6.5 inches
~24 rainy days
Conditions
Humidity
82%
Comparison to Adjacent Months
September is 51mm wetter than August.
September is 58mm drier than October.