May weather forecast and climate
Cancún, Mexico

White sandy beach and the clear blue waters in Cancún, Mexico
White sandy beach and the clear blue waters in Cancún, Mexico

Weather in May

The last month of the spring, May, is also a moderately hot month in Cancún, Mexico, with average temperature varying between 29.8°C (85.6°F) and 25.9°C (78.6°F).

Temperature

In Cancún, the average high-temperature in May is relatively the same as in April - a still warm 29.8°C (85.6°F). In May, the average low-temperature is 25.9°C (78.6°F).

Heat index

The average heat index is evaluated at a sweltering 36°C (96.8°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy 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 'feels like', 'felt air temperature', 'apparent temperature', or 'real feel', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Additional factors like metabolic differences, clothing, 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. 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. Excessive warmth is eliminated from the body by evaporation of sweat. 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 May is 76%.

Rainfall

In Cancún, during 17.8 rainfall days, 78mm (3.07") of precipitation is typically accumulated. Throughout the year, there are 224.7 rainfall days, and 886mm (34.88") of precipitation is accumulated.

Sea temperature

In Cancún, Mexico, in May, the average water temperature is 27.7°C (81.9°F).
Note: 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.

Daylight

The average length of the day in May is 13.2h.

Sunshine

The average sunshine in May is 8.9h.

UV index

Months with the highest UV index are March through October, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 7 transform into the following instructions:
Take precautions against overexposure. Protection against sun damage is needed. 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. 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 Cancún?

The average high-temperature, in May, is 29.8°C (85.6°F), while the average low-temperature is 25.9°C (78.6°F). The average heat index (a.k.a. 'feels like', 'felt air temperature'), that factores the actual air temperature with the relative humidity, in May is calculated to 36°C (96.8°F).

What is the average humidity in May in Cancún?

In May, the average relative humidity in Cancún, Mexico, is 76%.

How much does it rain in Cancún in May?

In Cancún, during May, the rain falls for 17.8 days and regularly aggregates up to 78mm (3.07") of precipitation.

What is the water temperature in May in Cancún?

In Cancún, Mexico, in May, the average water temperature is 27.7°C (81.9°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 Cancún have in May?

In Cancún, Mexico, the average length of the day in May is 13.2h.

How many hours of sunshine does Cancún have in May?

In Cancún, the average sunshine in May is 8.9h.

What is the month with the highest UV index in Cancún?

March through October, with an average maximum UV index of 7, are months with the highest UV index in Cancún, Mexico.

How high is the UV index in May in Cancún?

The average daily maximum UV index in May in Cancún, Mexico, is 7. A UV Index of 6 to 7 symbolizes a high health threat from the exposure to the Sun's UV radiation.

Average temperature in May
Cancún, Mexico

Average temperature in May - Cancún, Mexico
  • Average high temperature in May: 29.8°C

The warmest month (with the highest average high temperature) is August (31°C).
The month with the lowest average high temperature is January (26°C).

  • Average low temperature in May: 25.9°C

The month with the highest average low temperature is August (27°C).
The coldest month (with the lowest average low temperature) is January (22.1°C).

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Average pressure in May
Cancún, Mexico

Average pressure in May - Cancún, Mexico
  • Average pressure in May: 1013.4mbar

The month with the highest atmospheric pressure is January (1017.7mbar).
The month with the lowest atmospheric pressure is September (1012.5mbar).

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Average wind speed in May
Cancún, Mexico

Average wind speed in May - Cancún, Mexico
  • Average wind speed in May: 16.7km/h

The windiest month (with the highest average wind speed) is March (18.8km/h).
The calmest month (with the lowest average wind speed) is July (13.1km/h).

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Average humidity in May
Cancún, Mexico

Average humidity in May - Cancún, Mexico
  • Average humidity in May: 76%

The month with the highest relative humidity is June (78%).
The month with the lowest relative humidity is March (73%).

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Average rainfall in May
Cancún, Mexico

Average rainfall in May - Cancún, Mexico
  • Average rainfall in May: 78mm

The wettest month (with the highest rainfall) is October (137mm).
The driest month (with the least rainfall) is March (26mm).

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Average rainfall days in May
Cancún, Mexico

Average rainfall days in May - Cancún, Mexico
  • Average rainfall days in May: 17.8 days

The month with the highest number of rainy days is October (23.3 days).
The month with the least rainy days is April (12.3 days).

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Average sea temperature in May
Cancún, Mexico

Average sea temperature in May - Cancún, Mexico
  • Average sea temperature in May: 27.7°C

The best month for swimming (with the highest average sea temperature) is August (29.4°C).
The coldest month (with the lowest average sea temperature) is January (25.6°C).

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

Average daylight in May / Average sunshine in May - Cancún, Mexico
  • Average daylight in May: 13.2h

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: 8.9h

Months with the most sunshine are July and August (Average sunshine: 9.3h).
The month with the least sunshine is January (Average sunshine: 7.7h).

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Average sunshine days in May
Cancún, Mexico

Average sunshine days in May - Cancún, Mexico
  • Average sunshine days in May: 9 days

The month with the most sunshine days is April (11.7 days).
The month with the least sunshine days is December (4.6 days).

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Average UV index in May
Cancún, Mexico

Average UV index in May - Cancún, Mexico
  • Average UV index in May: 7

Months with the highest UV index are March, April, May, June, July, August, September and October (UV index 7).
Months with the lowest UV index are January, February, November and December (UV index 6).

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Average cloud cover in May
Cancún, Mexico

Average cloud cover in May - Cancún, Mexico
  • Average cloud cover in May: 28

The month with the most cloud cover is January (Cloud cover 40).
The month with the least cloud cover is July (Cloud cover 23).

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Average visibility in May
Cancún, Mexico

Average visibility in May - Cancún, Mexico
  • Average visibility in May: 10km

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

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