April weather forecast and climate
Cozumel, Mexico

Abril, like Marzo, is another hot spring month in Cozumel, Mexico, with average temperature fluctuating between 32°C (89.6°F) and 21.8°C (71.2°F).
An excellent water temperature of 27°C (80.6°F) and only 3.7 rainfall días, with 44.8mm (1.76") of accumulated rainfall, makes Abril a prime for swimming and other water activities.

Temperature

In Abril, the average high-temperature is almost the same as in Marzo - a still tropical 32°C (89.6°F). In Cozumel, the average low-temperature is 21.8°C (71.2°F).

Heat index

In Abril, the average heat index is estimated at a scorching 43.9°C (111°F). Be wary - heat exhaustion and heat cramps are highly anticipated. With continued activity, heatstroke is very likely.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'feels like', 'felt air temperature', or 'apparent temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (differences in body mass, height, and shape, wind, clothing). Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 37.5°C (99.5°F) to 38.3°C (100.9°F), thermal conditions are potentially life-threatening.

Humidity

Marzo and Abril, with an average relative humidity of 79%, are the least humid months in Cozumel, Mexico.

Rainfall

In Cozumel, in Abril, it is raining for 3.7 days, with typically 44.8mm (1.76") of accumulated precipitation. In Cozumel, during the entire year, the rain falls for 119.9 days and collects up to 1489.9mm (58.66") of precipitation.

Sea temperature

In Abril, the average sea temperature in Cozumel is 27°C (80.6°F).
Note: For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

Daylight

In Cozumel, the average length of the day in Abril is 12.6h.

Sunshine

With an average of 8.6h of sunshine, Abril has the most sunshine of the year in Cozumel.

UV index

Months with the highest UV index are Abril through Agosto, with an average maximum UV index of 12. A UV Index of 11, and more, symbolizes an extreme threat to health from the exposure to the Sun's UV radiation for the average person.
Note: In Abril, the average maximum UV index of 12 translate into the following recommendations:
Take all necessary precautions, as unprotected skin can burn in minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.