August weather forecast and climate
Cozumel, Mexico

The last month of the summer, August, is another tropical month in Cozumel, Mexico, with average temperature fluctuating between 33°C (91.4°F) and 23.5°C (74.3°F).

Temperature

The warmest month is August, with an average high-temperature of 33°C (91.4°F) and an average low-temperature of 23.5°C (74.3°F).

Heat index

The average heat index is calculated to a blazing hot 50.2°C (122.4°F). Be wary - heat exhaustion and heat cramps are highly anticipated. With continued activity, heatstroke is very likely.
Note that heat index values are valued for light wind and location in the shade. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'feels like', 'real feel', or 'felt air temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (differences in body mass, height, and shape, pregnancy, metabolic differences). Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

In Cozumel, the average relative humidity is 84%.

Rainfall

In Cozumel, Mexico, in August, it is raining for 13.4 days, with typically 141.7mm (5.58") of accumulated precipitation. Throughout the year, there are 119.9 rainfall days, and 1489.9mm (58.66") of precipitation is accumulated.

Sea temperature

July through October, with an average sea temperature of 29°C (84.2°F), are months with the warmest seawater in Cozumel.
Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

In August, the average length of the day in Cozumel is 12.8h.

Sunshine

In Cozumel, Mexico, the average sunshine is 7.2h.

UV index

April through August, with an average maximum UV index of 12, are months with the highest UV index in Cozumel. A UV Index reading of 11, and higher, represents an ultimate health vulnerability from the exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 12 in August interpret into the following advice:
Take all necessary precautions, as unprotected skin can burn in minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.