average temperature cozumel
Cozumel: Annual Weather Averages. August is the hottest month in Cozumel with an average temperature of 28Â°C (82Â°F) and the coldest is January at 24Â°C (75Â°F) with the most daily sunshine hours at 11 in May.The wettest month is September with an average of 247mm of rain.The best month to swim in the sea is in August when the average sea temperature is 29Â°C (84Â°F).he wettest month is September with an average of 247mm of rain. The best month to swim in the sea is in August when the average sea temperature is 29Â°C (84Â°F).