July 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 July

July, like June, is a hot summer month in Cozumel, Mexico, with temperature in the range of an average high of 32.6°C (90.7°F) and an average low of 23.5°C (74.3°F).

Temperature

In Cozumel, the average high-temperature in July is practically the same as in June - a still hot 32.6°C (90.7°F). In July, in Cozumel, the average low-temperature is 23.5°C (74.3°F).

Heat index

In July, the average heat index is estimated at a life-threatening hot 48.5°C (119.3°F). Beware - heat cramps and heat exhaustion are very likely. Heatstroke is imminent with prolonged activity.
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', 'real feel', 'felt air temperature', or 'feels like', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (metabolic differences, pregnancy, clothing). Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. 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 July, the average relative humidity is 84%.

Rainfall

In July, in Cozumel, the rain falls for 11.8 days. Throughout July, 115.5mm (4.55") of precipitation is accumulated. In Cozumel, Mexico, during the entire year, the rain falls for 119.9 days and collects up to 1489.9mm (58.66") of precipitation.

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 Cozumel, the average length of the day is 13.2h.

Sunshine

In Cozumel, the average sunshine is 7.1h.

UV index

Months with the highest UV index in Cozumel are April through August, with an average maximum UV index of 12. A UV Index of 11, and more, symbolizes an extreme threat to health from the exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 12 in July transform into the following instructions:
Take all required precautions, as unprotected skin and eyes can burn in minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. 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. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in July in Cozumel?

In July, in Cozumel, the average high-temperature is 32.6°C (90.7°F), and the average low-temperature is 23.5°C (74.3°F). The average heat index (a.k.a. 'feels like', 'real feel'), that combines both air temperature and relative humidity, in July is estimated at 48.5°C (119.3°F).

What is the average humidity in July in Cozumel?

In July, the average relative humidity is 84%.

How many days does it rain in July in Cozumel?

In July, in Cozumel, Mexico, the rain falls for 11.8 days. Throughout July, 115.5mm (4.55") of precipitation is accumulated.

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

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

How warm is the water in July in Cozumel?

In Cozumel, the average seawater temperature in July 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 July in Cozumel?

The average length of the day in July is 13.2h.

How long on average sun shines in July in Cozumel?

In July, the average sunshine in Cozumel, Mexico, is 7.1h.

What is the month with the highest UV index in Cozumel?

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

What is the UV index intensity in July in Cozumel?

In Cozumel, Mexico, the average daily maximum UV index in July is 12. A UV Index reading of 11, and higher, represents an excessive health risk from the exposure to the Sun's UV radiation.

Average temperature in July
Cozumel, Mexico

Average temperature in July - Cozumel, Mexico
  • Average high temperature in July: 32.6°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 July: 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 July
Cozumel, Mexico

Average humidity in July - Cozumel, Mexico
  • Average humidity in July: 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 July
Cozumel, Mexico

Average rainfall in July - Cozumel, Mexico
  • Average rainfall in July: 115.5mm

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 July
Cozumel, Mexico

Average rainfall days in July - Cozumel, Mexico
  • Average rainfall days in July: 11.8 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 July
Cozumel, Mexico

Average sea temperature in July - Cozumel, Mexico
  • Average sea temperature in July: 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 July /
Average sunshine in July
Cozumel, Mexico

Average daylight in July / Average sunshine in July - Cozumel, Mexico
  • Average daylight in July: 13.2h

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 July: 7.1h

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 July
Cozumel, Mexico

Average UV index in July - Cozumel, Mexico
  • Average UV index in July: 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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