October weather forecast
Cozumel, Mexico

As October dawns, the rainfall continues to dominate the Cozumel weather. A further decrease in daylight hours suggests the forthcoming arrival of winter. The UV index dips to 9, but sun protection remains essential during midday. Despite these changes, the sea temperature remains high at 29°C (84.2°F). As a record, the month experiences the highest number of rainfall days, amounting to 15.7.

Temperature

The start of October sees the average high-temperature at a still tropical 30.7°C (87.3°F), showing little difference from September's 31.9°C (89.4°F). In October, the nighttime temperature lowers to an average of 23.1°C (73.6°F).

Heat index

The heat index for October is calculated to be a blisteringly hot 42°C (107.6°F). Exercise enhanced safety steps, heat cramps and heat exhaustion are probable. Heatstroke could be a result of sustained activity.
For clarity, heat index numbers account for light winds and areas under shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is the result of factoring in humidity to the air temperature, indicating perceived warmth. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. 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 October is 85%.

Rainfall

October is the month with the most rainfall. Rain falls for 15.7 days and accumulates 243mm (9.57") of precipitation.

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 ranging between 25°C (77°F) and 29°C (84.2°F) is considered very warm and pleasing for everyone. It allows for enjoyable water activities over extended periods without discomfort.

Daylight

In October, the average length of the day is 11h and 40min.
On the first day of the month, sunrise is at 6:38 am and sunset at 6:35 pm. On the last day of October, in Cozumel, Mexico, sunrise is at 6:49 am and sunset at 6:13 pm EST.

Sunshine

In Cozumel, the average sunshine in October is 6.2h.

UV index

In Cozumel, the average daily maximum UV index in October is 9. A UV Index value of 8 to 10 symbolizes a very high health risk from unprotected exposure to Sun's UV rays for the average person.
Note: In October, the maximum UV index of 9 suggests this advice:
Never be careless. Unprotected skin and eyes can be harmed swiftly. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Every two hours, apply and reapply an SPF 30+ broad-spectrum sunscreen, especially after swimming or engaging in outdoor activities. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.