Cancun starts to cool down in October, but the average temperature is still around 87°F. With an average of 8 days of rain and 8 inches of rainfall, October is the second wettest month for Cancun. Please bear in mind that October is the peak month for hurricanes. Although there hasn’t been a severe hurricane in Cancun since 2005, it’s worth considering before heading to Cancun in October. If you want to play it safe, plan your trip in the 2nd half of the month.