May 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 May

May, the last month of the spring, in Cozumel, is another hot month, with average temperature fluctuating between 32.7°C (90.9°F) and 22.9°C (73.2°F).

Temperature

In May, the average high-temperature is essentially the same as in April - a still hot 32.7°C (90.9°F). In May, in Cozumel, the average low-temperature is 22.9°C (73.2°F).

Heat index

In May, the average heat index is appraised at a burning hot 47°C (116.6°F). Be wary - heat exhaustion and heat cramps are highly anticipated. With continued activity, heatstroke is very likely.
Take into consideration that the heat index values are calculated for shade and light wind conditions. 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 'feels like', 'apparent temperature', 'real feel', or 'felt air temperature', is a measure of how hot it feels when the actual air humidity is factored in. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (metabolic differences, clothing, differences in body mass, height, and shape). 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, as evaporated sweat carries heat away from the body. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 37.5°C (99.5°F) to 38.3°C (100.9°F), thermal conditions are potentially life-threatening.

Humidity

The average relative humidity in Cozumel is 80%.

Rainfall

In Cozumel, during 7.2 rainfall days, 110.6mm (4.35") of precipitation is typically accumulated. Throughout the year, in Cozumel, there are 119.9 rainfall days, and 1489.9mm (58.66") of precipitation is accumulated.

Sea temperature

In May, the average sea temperature in Cozumel is 28°C (82.4°F).
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, Mexico, the average length of the day in May is 13.1h.

Sunshine

In May, the average sunshine is 7.5h.

UV index

Months with the highest UV index are April through August, with an average maximum UV index of 12. A UV Index value of 11, and more, symbolizes an ultimate health vulnerability from unprotected exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 12 interpret into the following advice:
Take all required precautions, as unprotected skin and eyes can burn in minutes. 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. 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. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise. 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 May in Cozumel?

The average high-temperature, in May, in Cozumel, is 32.7°C (90.9°F), while the average low-temperature is 22.9°C (73.2°F). The average heat index (a.k.a. 'apparent temperature', 'real feel'), that combines relative humidity and air temperature, in May is evaluated at 47°C (116.6°F).

What is the average humidity in May in Cozumel?

In May, the average relative humidity in Cozumel, Mexico, is 80%.

How many days does it rain in May in Cozumel?

In Cozumel, in May, it is raining for 7.2 days, with typically 110.6mm (4.35") of accumulated precipitation.

What is the water temperature in May in Cozumel?

In May, the average sea temperature in Cozumel is 28°C (82.4°F). 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.

How many hours of daylight does Cozumel have in May?

In May, the average length of the day in Cozumel, Mexico, is 13.1h.

How long on average sun shines in May in Cozumel?

In Cozumel, Mexico, the average sunshine in May is 7.5h.

What are the months 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.

How high is the UV index in May in Cozumel?

In Cozumel, Mexico, the average daily maximum UV index in May is 12. A UV Index value of 11, and more, symbolizes an extreme health threat from the exposure to the Sun's UV radiation.

Average temperature in May
Cozumel, Mexico

Average temperature in May - Cozumel, Mexico
  • Average high temperature in May: 32.7°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 May: 22.9°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 May
Cozumel, Mexico

Average humidity in May - Cozumel, Mexico
  • Average humidity in May: 80%

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 May
Cozumel, Mexico

Average rainfall in May - Cozumel, Mexico
  • Average rainfall in May: 110.6mm

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 May
Cozumel, Mexico

Average rainfall days in May - Cozumel, Mexico
  • Average rainfall days in May: 7.2 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 May
Cozumel, Mexico

Average sea temperature in May - Cozumel, Mexico
  • Average sea temperature in May: 28°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 May /
Average sunshine in May
Cozumel, Mexico

Average daylight in May / Average sunshine in May - Cozumel, Mexico
  • Average daylight in May: 13.1h

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 May: 7.5h

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 May
Cozumel, Mexico

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