August weather forecast and climate
Cozumel, Mexico

Palm trees and clear blue waters on Chen Rio white sandy beach in Cozumel, Mexico
Palm trees and clear blue waters on Chen Rio white sandy beach in Cozumel, Mexico

Weather in August

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.
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FAQ

What is the warmest month in Cozumel?

With an average high-temperature of 33°C (91.4°F) and an average low-temperature of 23.5°C (74.3°F), August is the warmest month in Cozumel.

What is the temperature in August in Cozumel?

In August, the average high-temperature is 33°C (91.4°F), and the average low-temperature is 23.5°C (74.3°F). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), that factores the actual air temperature with the relative humidity, in August is calculated to 50.2°C (122.4°F).

What is the average humidity in August in Cozumel?

In Cozumel, Mexico, the average relative humidity in August is 84%.

How much does it rain in Cozumel in August?

In Cozumel, in August, it is raining for 13.4 days, with typically 141.7mm (5.58") of accumulated precipitation.

What are the months with the warmest sea water in Cozumel?

Months with the warmest seawater are July through October, with an average sea temperature of 29°C (84.2°F).

What is the sea water temperature in August in Cozumel?

In August, the average sea temperature in Cozumel, Mexico, is 29°C (84.2°F). 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.

What is the average length of the day in August in Cozumel?

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

How many hours of sunshine does Cozumel have in August?

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

When is the highest UV index in Cozumel?

Months with the highest UV index are April through August, with an average maximum UV index of 12.

What is the UV index intensity in August in Cozumel?

In August, the average daily maximum UV index in Cozumel is 12. A UV Index reading of 11, and higher, represents an extreme health threat from unsafe exposure to the Sun's UV rays.

Average temperature in August
Cozumel, Mexico

Average temperature in August - Cozumel, Mexico
  • Average high temperature in August: 33°C

The warmest month (with the highest average high temperature) is August (33°C).
Months with the lowest average high temperature are January and December (28.6°C).

  • Average low temperature in August: 23.5°C

The month with the highest average low temperature is June (23.8°C).
The coldest months (with the lowest average low temperature) are January and February (19.4°C).

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Average humidity in August
Cozumel, Mexico

Average humidity in August - Cozumel, Mexico
  • Average humidity in August: 84%

The month with the highest relative humidity is September (87%).
Months with the lowest relative humidity are March and April (79%).

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Average rainfall in August
Cozumel, Mexico

Average rainfall in August - Cozumel, Mexico
  • Average rainfall in August: 141.7mm

The wettest month (with the highest rainfall) is October (242.5mm).
The driest month (with the least rainfall) is March (32.2mm).

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Average rainfall days in August
Cozumel, Mexico

Average rainfall days in August - Cozumel, Mexico
  • Average rainfall days in August: 13.4 days

The month with the highest number of rainy days is October (15.7 days).
The month with the least rainy days is April (3.7 days).

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Average sea temperature in August
Cozumel, Mexico

Average sea temperature in August - Cozumel, Mexico
  • Average sea temperature in August: 29°C

The best months for swimming (with the highest average sea temperature) are July, August, September and October (29°C).
The coldest months (with the lowest average sea temperature) are February and March (26°C).

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Average daylight in August /
Average sunshine in August
Cozumel, Mexico

Average daylight in August / Average sunshine in August - Cozumel, Mexico
  • Average daylight in August: 12.8h

The month with the longest days is June (Average daylight: 13.4h).
The month with the shortest days is December (Average daylight: 10.9h).

  • Average sunshine in August: 7.2h

The month with the most sunshine is April (Average sunshine: 8.6h).
Months with the least sunshine are September and November (Average sunshine: 6.1).

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Average UV index in August
Cozumel, Mexico

Average UV index in August - Cozumel, Mexico
  • Average UV index in August: 12

Months with the highest UV index are April, May, June, July and August (UV index 12).
Months with the lowest UV index are January and December (UV index 7).

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