April weather forecast
Cozumel, Mexico

April harbors the onset of the dry season, with lower rainfall amounts compared to previous months. Daylight continues to stretch, paving the way for extended outdoor sessions. The UV index remains high, making sunglasses and hats indispensable accessories. Sea temperature reaches 27°C (80.6°F), encouraging beachgoers and snorkelers to frequent the coast. The month also observes a surge in temperature swinging from 21.8°C (71.2°F) to a scorching 32°C (89.6°F).

Temperature

April's arrival shows an average high-temperature of a still tropical 32°C (89.6°F), hardly different from the previous month. In the month of April, Cozumel witnesses a consistent average low-temperature of 21.8°C (71.2°F).

Heat index

During April, the heat index is computed to be a scorching 44°C (111.2°F). Forewarned: Heat cramps and heat exhaustion are anticipated. Ongoing physical activity increases the likelihood of heatstroke.
It is essential to grasp that the heat index's numbers are for shade and light wind settings. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. Factors including metabolic differences, physical activity, and clothing are additional elements that influence the individual's temperature experience. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.
To achieve cooling, the human body employs perspiration, relying on the subsequent evaporation of sweat. When relative humidity is on the rise, it curtails evaporation, thereby reducing the heat elimination from the body and causing the feeling of being excessively hot. Rising body temperatures resulting from an imbalance in heat absorption can lead to potential thermal issues.

Humidity

The months with the lowest humidity are March and April, with an average relative humidity of 79%.

Rainfall

In Cozumel, in April, it is raining for 3.7 days, with typically 45mm (1.77") of accumulated precipitation. Throughout the year, there are 119.9 rainfall days, and 1490mm (58.66") of precipitation is accumulated.

Sea temperature

In Cozumel, in April, the average water temperature is 27°C (80.6°F).
Note: In water activities such as swimming and diving, temperatures from 25°C (77°F) to 29°C (84.2°F) are deemed highly pleasurable for extended periods without any unease.

Daylight

In April, the average length of the day is 12h and 38min.
On the first day of the month, sunrise is at 6:40 am and sunset at 7:02 pm. On the last day of April, sunrise is at 6:18 am and sunset at 7:11 pm EST.

Sunshine

With an average of 8.6h of sunshine, April has the most sunshine of the year.

UV index

The months with the highest UV index are April through August, with an average maximum UV index of 12. A UV Index value of 11, and more, symbolizes an extreme health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum UV index of 12 during April translates into these guidelines:
Adopt every vital precaution, unprotected skin and eyes may burn rapidly. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. To cut down UV radiation exposure by about half, sport a wide-brim hat. Sunscreen with a sun protection factor of no less than 30 should be used liberally and reapplied frequently on overcast days, including after every swim or outdoor activity. Caution! The mirror effect of sand and water ups the UV radiation strength.