May weather forecast
Cozumel, Mexico

Shifting towards May results in warmer temperatures and an increase in relative humidity as the dry season persists. Most days are sunlit and long, creating suitable conditions for sightseeing and exploring Cozumel. A high UV index of 12 advises caution when outdoors between sunup and sundown. However, the weather in May starts to break the dry spell with a relatively high recorded rainfall of 111mm. Nevertheless, the changes don't disrupt the increasing sea temperature, which tops 28°C.

Temperature

On the advent of May, Cozumel's average high-temperature exhibits a minor adjustment to a still tropical 32.7°C from April's 32°C. During the month of May, an average low-temperature of 22.9°C is recorded.

Heat index

The average heat index in May is evaluated at a burning hot 47°C. Take heed: Heat exhaustion and heat cramps are anticipated. Heatstroke is a potential outcome of continuous activity.
In the scope of the heat index, its values resonate with shade and light wind conditions. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', represents the fusion of temperature and moisture in the air to suggest how warm it feels. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. 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 are particularly relevant to 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.
The natural cooling mechanism in humans involves perspiration, where the evaporation of sweat balances out excessive warmth. Increased relative humidity slows down evaporation, thereby decreasing the rate of heat removal from the body, culminating in a sensation of overheating. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.

Humidity

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

Rainfall

In Cozumel, during May, the rain falls for 7.2 days and regularly aggregates up to 111mm of precipitation. Throughout the year, there are 119.9 rainfall days, and 1490mm of precipitation is accumulated.

Sea temperature

In Cozumel, the average seawater temperature in May is 28°C.
Note: Water temperatures in the range of 25°C to 29°C are warm and delightful, ensuring comfort during water activities over extended periods.

Daylight

The average length of the day in May is 13h and 7min.
On the first day of May, 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.

Sunshine

In Cozumel, the average sunshine in May is 7.5h.

UV index

April through August, with an average maximum UV index of 12, are months with the highest UV index in Cozumel. A UV Index of 11, and more, symbolizes an extreme threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 12 in May transforms into the following instructions:
Practice all-important precautions. Light skin people may get burned in less than 5 minutes. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Directly after swimming or an outdoor workout, generously apply and reapply a broad-spectrum SPF 30+ sunscreen. Note! Reflective surfaces like sand and water heighten the UV radiation levels.