March weather forecast and climate
Cozumel, Mexico

The first month of the spring, March, is a tropical month in Cozumel, Mexico, with average temperature ranging between max 30.9°C (87.6°F) and min 20.7°C (69.3°F).
The ideal sea water temperature of 26°C (78.8°F) and only 4 rainfall days, with 32.2mm (1.3") of accumulated rainfall, make March the best time for swimming and other water activities.

Temperature

In Cozumel, Mexico, the average high-temperature in March is relatively the same as in February - a tropical 30.9°C (87.6°F). In March, in Cozumel, the average low-temperature is 20.7°C (69.3°F).

Heat index

In March, the average heat index is evaluated at a scorching 40.2°C (104.4°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. With the 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 'real feel', 'felt air temperature', 'apparent temperature', or 'feels like', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (metabolic differences, differences in body mass, height, and shape, clothing). Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index 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 cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

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

Rainfall

The month with the least rainfall is March when the rain falls for 4 days and typically collects 32.2mm (1.3") of precipitation.

Sea temperature

Months with the coldest seawater in Cozumel are February and March, with an average sea temperature of 26°C (78.8°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 March is 12h.

Sunshine

In Cozumel, the average sunshine is 7.5h.

UV index

In March, the average daily maximum UV index in Cozumel, Mexico, is 11. A UV Index of 11, and more, symbolizes an ultimate health vulnerability from the exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 11 transform into the following instructions:
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. 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. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.