May weather forecast
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

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

Temperature

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

Heat index

The average heat index in May is calculated to be a burning hot 47°C (116.6°F). Beware: Heat cramps and heat exhaustion are very likely. Heatstroke is imminent with prolonged activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'real feel', 'felt air temperature', or 'feels like', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional factors like differences in body mass, height, and shape, wind, metabolic differences, and activity influence one's weather impression. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

The average relative humidity in May in Cozumel is 80%.

Rainfall

In Cozumel, during 7.2 rainfall days, 110.6mm (4.35") of precipitation is typically accumulated. In Cozumel, during the entire year, the rain falls for 119.9 days and collects up to 1489.9mm (58.66") of precipitation.

Sea temperature

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

In May, the average length of the day in Cozumel is 13h and 7min.
On the first day of the month, sunrise is at 6:17 am and sunset at 7:11 pm. On the last day of May, sunrise is at 6:06 am and sunset at 7:23 pm EST.

Sunshine

The average sunshine in May is 7.5h.

UV index

The months with the highest UV index in Cozumel are April through August, with an average maximum UV index of 12. A UV Index reading of 11, and higher, represents an extreme threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: In May, the average maximum UV index of 12 translate into the following recommendations:
Practice all-important precautions. Light skin people may get burned in less than 5 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. 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. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.
[Resources]

FAQ

What is the temperature in May in Cozumel?

In Cozumel, in May, the average high-temperature is 32.7°C (90.9°F), and the average low-temperature is 22.9°C (73.2°F). In May, the average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines relative humidity and air temperature, is calculated to be 47°C (116.6°F).

What is the average humidity in May in Cozumel?

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

How many days does it rain in May in Cozumel?

In Cozumel, Mexico, during May, the rain falls for 7.2 days and regularly aggregates up to 110.6mm (4.35") of precipitation.

How warm is the water in May in Cozumel?

In May, the average sea temperature 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 day length in Cozumel is 13h and 7min.

When are sunrise and sunset in May in Cozumel?

On the first day of May in Cozumel, sunrise is at 6:17 am and sunset at 7:11 pm. On the last day of the month, sunrise is at 6:06 am and sunset at 7:23 pm EST.

How long on average sun shines in May in Cozumel?

The average sunshine duration 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 in Cozumel, Mexico.

How high is the UV index in May in Cozumel?

The average daily maximum UV index in May in Cozumel, Mexico, is 12. A UV Index estimate of 11, and higher, represents an extreme health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average sunshine
Average UV index

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).
The 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).

[Resources]

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%).
The months with the lowest relative humidity are March and April (79%).

[Resources]

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).

[Resources]

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).

[Resources]

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).

[Resources]

Average daylight in May /
Average sunshine in May
Cozumel, Mexico

Average daylight in May / Average sunshine in May - Cozumel, Mexico
  • Average daylight in May: 13h and 7min

The month with the longest days is June (Average daylight: 13h and 21min).
The month with the shortest days is December (Average daylight: 10h and 55min).

  • Average sunshine in May: 7h and 30min

The month with the most sunshine is April (Average sunshine: 8h and 36min).
The months with the least sunshine are September and November (Average sunshine: 6h and 6min).

[Resources]

Average UV index in May
Cozumel, Mexico

Average UV index in May - Cozumel, Mexico
  • Average UV index in May: 12

The months with the highest UV index are April, May, June, July and August (UV index 12).
The months with the lowest UV index are January and December (UV index 7).

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location