May weather forecast
Cancún, Mexico

The climate in May continues on the upward swing with a substantial rise in all weather parameters. This considerable surge, often results in discomfort among visiting tourists, particularly during the peak daytime hours. However, the higher temperatures provide perfect conditions for water-related activities including fishing, diving, and sailing.
Cancún in May experiences a recorded high of 29.8°C (85.6°F), a minimum of 25.9°C (78.6°F) with significant rainfall of 78mm (3.07"), spread across 17.8 days. Despite the elevated hotness, the city of Cancún continues to bustle with a vibrancy that is characteristic of this hotspot destination.

Temperature

The advent of May in Cancún, Mexico, signifies a minor shift to an average high-temperature of a still warm 29.8°C (85.6°F), aligning closely with April. Cancún indicates a consistently low-temperature of 25.9°C (78.6°F) during the nights of May.

Heat index

The heat index value for May is appraised at a sweltering 36°C (96.8°F). Adopt enhanced safety measures, heat exhaustion and heat cramps could occur. Continuous activity may induce heatstroke.
Heat index evaluations are typically in the context of light winds and shaded environments. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a single figure representing how weather conditions feel when combining temperature and humidity. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values hold particular importance for children. Kids often lack the knowledge about the necessity to take breaks and consume liquids. Thirst, as a late symptom of dehydration, necessitates the maintenance of hydration, particularly during enduring physical activities.
When faced with excessive heat, the human body begins to perspire, utilizing the cooling benefits of sweat evaporation. Increased relative humidity slows down evaporation, thereby decreasing the rate of heat removal from the body, culminating in a sensation of overheating. Heat disorders may be on the horizon when body temperatures rise from inadequate heat management.

Humidity

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

Rainfall

In May, in Cancún, the rain falls for 17.8 days. Throughout May, 78mm (3.07") of precipitation is accumulated. Throughout the year, in Cancún, there are 224.7 rainfall days, and 886mm (34.88") of precipitation is accumulated.

Sea temperature

In Cancún, Mexico, the average seawater temperature in May is 27.7°C (81.9°F).
Note: For activities such as swimming and diving, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as particularly pleasant and satisfying for prolonged periods without feeling uneasy.

Daylight

In May, the average length of the day in Cancún, Mexico, is 13h and 9min.
On the first day of the month, sunrise is at 6:16 am and sunset at 7:12 pm. On the last day of May, in Cancún, sunrise is at 6:05 am and sunset at 7:25 pm EST.

Sunshine

In May, the average sunshine is 8.9h.

UV index

The months with the highest UV index are March through October, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: A maximum daily UV index of 7 during May morphs into the following directions:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Always opt for UVA and UVB-resistant sunglasses on radiant days. Attention! UV strength is notably upped by the reflection of sand and water.