The hottest month in Cozumel Beach is August when the average maximum temperature is 32°, average temperature is 28° and average minimum temperature is 24°.
The coolest month in Cozumel Beach is January when the average maximum temperature is 26°, average temperature is 23° and average minimum temperature is 19°.
The longest days in Cozumel Beach are in June, with an average of 13.4 hours of daylight per day. December has the shortest days with an average of 10.9 hours of daylight per day.
The sunniest days in Cozumel Beach are in February which has the most hours of sunshine per day with an average of 6.7 hours of sunshine per day, making it a quite sunny month with some cloud cover. October has the least sunshine with an average of 4.6 hours of sunshine per day, making it a sunny month that is overcast at times.
The ultraviolet index is the highest in May when it reaches 13.2 and lowest in December when it reaches 6.9.
An ultraviolet index reading above 11 indicates an extreme risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 10 minutes. Take all precautions because unprotected skin and eyes can burn in minutes. Tanning will be safest before 10am and after 4pm but only with a good application of sun screen. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.
The warmest sea water temperatures in Cozumel Beach are found in September when they peak at 30° and lowest in February when they dip to 27°.
The sea is excellent for swimming all year round as the water temperature is very warm and ideal for relaxing and swimming for the whole day.
The wettest month in Cozumel Beach is September with 116.9cm of rain and the most days of rain with 12.9 days with some rain, a very wet time to visit the beach.
The driest month in Cozumel Beach is January with 30.2cm of rain and April has the fewest days of rain with 2.8 days with some rain, a slightly wet time to visit the beach.
The most humid month in Cozumel Beach is August with a dew point (an indicator of humidity) of 26° which is very uncomfortable and fairly oppressive unless you are on a beach. At night you would most likely require airconditioning.
The least humid month in Cozumel Beach is January with a dew point of 21° which is somewhat uncomfortable for most people in cities but fine on a beach.
The most windy month in Cozumel Beach is March when the average maximum windspeed is 29kmh and the average wind speed is 15kmh.
The least windy month in Cozumel Beach is September when the average maximum windspeed is 23kmh and the average wind speed is 9kmh.