April weather forecast and climate
Cozumel, Mexico

April, like March, is another tropical spring month in Cozumel, Mexico, with average temperature varying between 21.8°C (71.2°F) and 32°C (89.6°F).
The perfect water temperature of 27°C (80.6°F) with 44.8mm (1.76") of accumulated rainfall and only 3.7 rainfall days, makes April a great period for swimming and other water activities.

Temperature

In Cozumel, the average high-temperature in April is relatively the same as in March - a still tropical 32°C (89.6°F). The average low-temperature, in April, is 21.8°C (71.2°F).

Heat index

The average heat index is appraised at a scorching 43.9°C (111°F). Beware - heat cramps and heat exhaustion are very likely. Heatstroke is imminent with prolonged activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'feels like', 'real feel', or 'felt air temperature', is a measure that combines both air temperature and relative humidity into a single value that indicates how hot the weather feels. Additional factors like differences in body mass, height, and shape, pregnancy, metabolic differences, and activity influence one's weather impression. 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 particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

March and April, with an average relative humidity of 79%, are the least humid months in Cozumel.

Rainfall

In Cozumel, in April, 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 Cozumel, the average seawater temperature in April is 27°C (80.6°F).
Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

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

Sunshine

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

UV index

April through August, with an average maximum UV index of 12, are months with the highest UV index in Cozumel, Mexico. A UV Index of 11, and more, symbolizes an extreme health hazard from the exposure to the Sun's UV radiation for the ordinary person.
Note: The daily maximum UV index of 12 in April interpret into the following advice:
Take all necessary precautions, as unprotected skin can burn in minutes. 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.