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

Cozumel records a slight change with April's average high-temperatures adjusting to a still hot 32°C (89.6°F) from March's 30.9°C (87.6°F). Cozumel's temperature tends to fall to an average low of 21.8°C (71.2°F) during the nights of April.

Heat index

For most parts of April, the heat index is estimated at a blisteringly hot 44°C (111.2°F). Watchful: Heat cramps and heat exhaustion are predicted. Continued exertion could lead to heatstroke.
Heat index guidelines indicate values are for light wind scenarios and shaded regions. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect is personal, influenced by the individual's physical activity and heat sensitivity, shaped by factors including wind, attire, and metabolic variations. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.
Evaporating sweat, thanks to perspiration, acts as a natural air conditioner for the human body. Heightened relative humidity interferes with the body's usual cooling mechanism by reducing evaporation, subsequently decreasing the body's cooling rate and increasing the sensation of heat. Heat-related complications, like dehydration, can manifest if the body's heat gain exceeds its dissipation capacity.

Humidity

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

Rainfall

In Cozumel, during April, the rain falls for 3.7 days and regularly aggregates up to 45mm (1.77") of precipitation. In Cozumel, during the entire year, the rain falls for 119.9 days and collects up to 1490mm (58.66") of precipitation.

Sea temperature

In April, the average sea temperature is 27°C (80.6°F).
Note: Water temperatures between 25°C (77°F) and 29°C (84.2°F) are regarded as very warm, ensuring all water activities are pleasurable for extended periods without feeling uneasy.

Daylight

In Cozumel, the average length of the day in April 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

The month with the most sunshine is April, with an average of 8.6h of sunshine.

UV index

The months with the highest UV index are April through August, with an average maximum UV index of 12. A UV Index of 11, and more, symbolizes an extreme health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: The UV index of 12 during April translates into the following guidance:
Carry out all vital precautions. Protection from sun exposure is a must. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Use liberally and reapply a broad-spectrum sunscreen with at least SPF 30 every two hours and right after outdoor activities or a swim. Be attentive! The UV exposure is heightened with reflections from sand and water.