July weather forecast
Cozumel, Mexico

The weather in July coincides with the apex of summer, suggesting high temperatures and prevailing humidity. Long summer days provide plenty of daylight for tourist activities. The sea temperature remains high at 29°C (84.2°F), offering ideal conditions for swimming and water sports. However, the UV index dips slightly to 12, requiring continued diligence in sun protection. July also holds moderate rainfall with approximately 116mm (4.57") precipitation.

Temperature

The transition into July in Cozumel shows a subtle variation to a still tropical 32.6°C (90.7°F) from June's 32.4°C (90.3°F) in the average high-temperature. Cozumel experiences a mean low-temperature of 23.5°C (74.3°F) during July.

Heat index

The heat index for July is calculated to be a blazing hot 49°C (120.2°F). Stay on guard: Heat exhaustion and heat cramps are predicted. Ongoing effort can cause heatstroke.
One should be cognizant that the heat index values are tailored for shaded spots and mild winds. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', embodies the combination of air temperature and moisture content to illustrate perceived heat. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
Evaporation of sweat is the main factor behind the cooling effect of perspiration in the human body. Under high air temperature coupled with high humidity (high heat index), the body's perspiration is reduced, intensifying the sensation of heat. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.

Humidity

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

Rainfall

In July, the rain falls for 11.8 days. Throughout July, 116mm (4.57") of precipitation is accumulated. Throughout the year, in Cozumel, there are 119.9 rainfall days, and 1490mm (58.66") of precipitation is accumulated.

Sea temperature

The months with the warmest seawater in Cozumel are July through October, with an average sea temperature of 29°C (84.2°F).
Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) is perceived as agreeably warm, making all water activities enjoyable without the risk of discomfort over lengthy durations.

Daylight

In Cozumel, the average length of the day in July is 13h and 14min.
On the first day of the month, sunrise is at 6:11 am and sunset at 7:32 pm. On the last day of July, in Cozumel, Mexico, sunrise is at 6:22 am and sunset at 7:25 pm EST.

Sunshine

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

UV index

April through August, with an average maximum UV index of 12, are months with the highest UV index. A UV Index reading of 11, and higher, represents an extreme health hazard from exposure to the Sun's UV rays for ordinary individuals.
Note: The UV index of 12 during July leads to these advisories:
Employ every precaution of importance, unprotected skin and eyes could burn within moments. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Regardless of the cloudiness of the day, a sunscreen with SPF 30 or more should be applied and reapplied generously, specifically after swimming or outdoor exercise. Warning! Sand and water reflections boost the intensity of UV exposure.