May weather forecast
Isla Mujeres, Mexico

May rings in the highest sea temperature of the year in Isla Mujeres, Mexico. The temperatures of the surrounding ocean waters shoot up to an annual high of 28°C (82.4°F), much to the delight of swimmers and divers. Despite the soaring temperatures, the weather conditions remain amicable for most tourist activities. The month brings with it the promise of rains, paving the way for the wet pattern to follow. However, May's relatively high humidity may cause slight discomfort for visitors unaccustomed to such conditions.

Temperature

With the arrival of May, Isla Mujeres's average high-temperature registers at a still moderately hot 29.6°C (85.3°F), indicating a subtle variation from the previous month. Recording a slight decline in temperature during the nights, Isla Mujeres's May temperatures average at a still moderately hot 25.9°C (78.6°F).

Heat index

For May, the heat index is computed to be a very hot 35°C (95°F). More protective measures are required - heat exhaustion and heat cramps are likely. Heatstroke may follow lengthy activity.
From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is an estimation of the warmth sensation when considering humidity levels. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.
The body's natural response to excessive warmth is perspiration, as it allows for cooling through sweat evaporation. When the air contains significant moisture, the efficiency of the evaporation process decreases, preventing the body from cooling down effectively and creating a feeling of overheating. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.

Humidity

The average relative humidity in May in Isla Mujeres is 76%.

Rainfall

In Isla Mujeres, in May, it is raining for 17 days, with typically 63mm (2.48") of accumulated precipitation. Throughout the year, there are 219.4 rainfall days, and 737mm (29.02") of precipitation is accumulated.

Sea temperature

In May, the average sea temperature is 28°C (82.4°F).
Note: Engaging in water activities, such as swimming or diving, in temperatures from 25°C (77°F) to 29°C (84.2°F) is very pleasurable for extended periods, without any discomfort.

Daylight

The average length of the day in May is 13h and 10min.
On the first day of the month, sunrise is at 6:15 am and sunset at 7:12 pm. On the last day of May, sunrise is at 6:04 am and sunset at 7:24 pm EST.

Sunshine

In May, the average sunshine in Isla Mujeres 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 estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: A maximum UV index of 7 in May translates into the following recommendations:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. 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. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Be attentive! The UV exposure is heightened with reflections from sand and water.