October 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 October

October, like September, is a hot autumn month in Cozumel, Mexico, with average temperature fluctuating between 30.7°C (87.3°F) and 23.1°C (73.6°F).

Temperature

In Cozumel, Mexico, the average high-temperature in October is essentially the same as in September - a still hot 30.7°C (87.3°F). The average low-temperature, in Cozumel, is 23.1°C (73.6°F).

Heat index

In October, the average heat index is appraised at a blistering 41.6°C (106.9°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. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'felt air temperature', 'apparent temperature', or 'real feel', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. Additional factors like metabolic differences, pregnancy, differences in body mass, height, and shape, and activity influence one's weather impression. 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 particularly important for children. 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. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. 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 in October is 85%.

Rainfall

The month with the most rainfall in Cozumel, Mexico, is October when the rain falls for 15.7 days and typically aggregates up to 242.5mm (9.55") of precipitation.

Sea temperature

July through October, with an average sea temperature of 29°C (84.2°F), are months with the warmest seawater.
Note: For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

Daylight

The average length of the day in October is 11.7h.

Sunshine

In October, the average sunshine is 6.2h.

UV index

The average daily maximum UV index in Cozumel is 9. A UV Index reading of 8 to 10 represents a very high health risk from the exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 9 in October transform into the following instructions:
Take special precautions, as unprotected eyes and skin can be burned and damaged quickly. 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 strength of the UV rays is significantly increased by the reflection of the water and sand.
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FAQ

What is the temperature in October in Cozumel?

In Cozumel, Mexico, in October, the average high-temperature is 30.7°C (87.3°F), and the average low-temperature is 23.1°C (73.6°F). In October, the average heat index (a.k.a. 'feels like', 'felt air temperature'), that combines air temperature and relative humidity, is evaluated at 41.6°C (106.9°F).

What is the average humidity in October in Cozumel?

In October, the average relative humidity is 85%.

How much does it rain in Cozumel in October?

In October, in Cozumel, the rain falls for 15.7 days. Throughout October, 242.5mm (9.55") of precipitation is accumulated.

What is the rainiest month in Cozumel?

October is the month with the most rainfall in Cozumel, Mexico. Rain falls for 15.7 days and accumulates 242.5mm (9.55") of precipitation.

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, Mexico.

What is the sea water temperature in October in Cozumel?

In Cozumel, Mexico, the average seawater temperature in October 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.

How many hours of daylight does Cozumel have in October?

In Cozumel, Mexico, the average length of the day in October is 11.7h.

How many hours of sunshine does Cozumel have in October?

The average sunshine in October is 6.2h.

What is the UV index intensity in October in Cozumel?

In Cozumel, the average daily maximum UV index in October is 9. A UV Index reading of 8 to 10 represents a very high health threat from the exposure to the Sun's UV radiation.

Average temperature in October
Cozumel, Mexico

Average temperature in October - Cozumel, Mexico
  • Average high temperature in October: 30.7°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 October: 23.1°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 October
Cozumel, Mexico

Average humidity in October - Cozumel, Mexico
  • Average humidity in October: 85%

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 October
Cozumel, Mexico

Average rainfall in October - Cozumel, Mexico
  • Average rainfall in October: 242.5mm

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 October
Cozumel, Mexico

Average rainfall days in October - Cozumel, Mexico
  • Average rainfall days in October: 15.7 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 October
Cozumel, Mexico

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

Average daylight in October / Average sunshine in October - Cozumel, Mexico
  • Average daylight in October: 11.7h

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 October: 6.2h

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 October
Cozumel, Mexico

Average UV index in October - Cozumel, Mexico
  • Average UV index in October: 9

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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