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 commencement of July brings an average high-temperature of a still hot 32.6°C (90.7°F), marking an inconsequential divergence from June. Cozumel records a steady low-temperature average of 23.5°C (74.3°F) during July.

Heat index

July's mean heat index is estimated at a burning hot 49°C (120.2°F). Caution: Heat cramps along with heat exhaustion are expected. Sustained activity could lead to heatstroke.
In reference to the heat index, it's for places in shade and with a slight wind. Heat index values have the potential to be boosted by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', gauges the sensation of temperature factoring in the air's moisture content. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Young kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.
Evaporation of sweat is the main factor behind the cooling effect of perspiration in the human body. Relative humidity in excess curtails evaporation, therefore reducing heat dissipation from the body, leading to feelings of excess heat. If heat absorption isn't effectively countered by the body's cooling methods, body temperature surges, hinting at potential problems.

Humidity

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

Rainfall

In Cozumel, in July, during 11.8 rainfall days, 116mm (4.57") of precipitation is typically accumulated. Throughout the year, there are 119.9 rainfall days, and 1490mm (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.
Note: For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

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, sunrise is at 6:22 am and sunset at 7:25 pm EST.

Sunshine

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 threat to health from exposure to the Sun's UV radiation for the average person.
Note: An average maximum UV index of 12 in July leads to these recommendations:
Enforce every vital precaution. Those with light skin could endure burns in a matter of minutes. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Apply and frequently reapply a broad-spectrum SPF 30+ sunscreen after every two hours, or immediately after a swim or outdoor exercise. Note! Reflective surfaces like sand and water heighten the UV radiation levels.