March weather forecast
Cozumel, Mexico

March, the first month of the spring in Cozumel, is a hot month, with an average temperature ranging between max 30.9°C (87.6°F) and min 20.7°C (69.3°F).
The perfect water temperature of 26°C (78.8°F) with 32mm (1.26") of accumulated rainfall and only 4 rainfall days, makes March a great period for swimming and other water activities.

Temperature

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

Heat index

In March, the average heat index is appraised at a scorching 40°C (104°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 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 'feels like', 'real feel', 'felt air temperature', or 'apparent temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is individual, with diverse people perceiving weather differently for numerous reasons (metabolic differences, wind, clothing), and activity. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. 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.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. 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

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

Rainfall

The month with the least rainfall in Cozumel is March, when the rain falls for 4 days and typically collects 32mm (1.26") of precipitation.

Sea temperature

February and March, with an average sea temperature of 26°C (78.8°F), are months with the coldest seawater.
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 March, the average length of the day is 12h and 3min.
On the first day of March in Cozumel, sunrise is at 7:07 am and sunset at 6:52 pm. On the last day of the month, sunrise is at 6:41 am and sunset at 7:01 pm EST.

Sunshine

In March, the average sunshine is 7.5h.

UV index

In March, the average daily maximum UV index is 11. A UV Index of 11, and more, symbolizes an extreme health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: The average daily UV index of 11 in March transform into the following instructions:
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. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. 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.