May weather forecast
Riviera Maya, Mexico

Weather in May in Riviera Maya marks the beginning of summer with higher temperatures and more rainfall, peaking at 86mm (3.39") over 17.9 days. This escalation in rain is a harbinger of the forthcoming rainy season. Long daylight hours also characterize May, allowing for extensive exploration of the city’s beaches and archaeological sites. As the summer season sets in, humidity levels rise slightly, although this is offset by a significant amount of sunshine throughout the day. Simultaneously, the winds begin to slow down a little, adding to the balmy summer experiences.

Temperature

The start of May marks an average high-temperature of a still warm 29.9°C (85.8°F), hardly distinguishable from the conditions in April. Throughout May, Riviera Maya records a steady low-temperature average of 25.8°C (78.4°F), a minor decrease from its daytime counterpart.

Heat index

The heat index value during May is computed to be a torrid 37°C (98.6°F). Heightened precautions are necessary, heat cramps and heat exhaustion are potential risks. Continuous activity could lead to heatstroke.
One should consider that heat index numbers are for shaded settings and light wind. The heat index could experience an increase of 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'feels like' or 'felt air temperature', blends air temperature and moisture content to represent the felt temperature to humans. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Juveniles often do not understand the need to recuperate and rehydrate. Thirst is a delayed symptom of dehydration - hence, it is vital to maintain hydration, particularly during ongoing physical activities.
Perspiring is how the human body naturally cools down, as sweat's evaporation takes away excess heat. An increase in relative humidity hinders the body's normal cooling function by reducing evaporation, thereby decreasing the rate of body cooling and enhancing the sense of warmth. As body temperatures escalate without effective heat release, one might face dehydration threats.

Humidity

In May, the average relative humidity in Riviera Maya is 77%.

Rainfall

In May, in Riviera Maya, the rain falls for 17.9 days. Throughout May, 86mm (3.39") of precipitation is accumulated. In Riviera Maya, during the entire year, the rain falls for 227.8 days and collects up to 1036mm (40.79") of precipitation.

Daylight

The average length of the day in May in Riviera Maya is 13h and 7min.
On the first day of May, sunrise is at 6:18 am and sunset at 7:13 pm. On the last day of the month, sunrise is at 6:07 am and sunset at 7:25 pm EST.

Sunshine

The average sunshine in May is 8.8h.

UV index

February through October, with an average maximum UV index of 7, are months with the highest UV index in Riviera Maya. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for ordinary individuals.
Note: In May, the UV index of 7 transforms into the following advice:
Guard oneself from overexposure. Defence against sun injury is vital. 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. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.