August weather forecast
Cozumel, Mexico

August continues the summer trend, with persistent high temperatures and humidity levels. Extended daylight hours and a steady sea temperature of 29°C (84.2°F) provide optimal conditions for beach activities. Still, the UV index remains high, highlighting the need for adequate sun protection. Although the month's highest temperature climbs to 33°C (91.4°F), rain showers provide occasional relief from the heat.

Temperature

The average temperatures reach their apex in August, averaging 33°C (91.4°F) at the high end and 23.5°C (74.3°F) at the low end.

Heat index

Throughout August, the heat index is computed to be a life-threatening hot 50°C (122°F). Keep alert: Heat cramps and heat exhaustion are probable. Heatstroke is a potential danger with continued physical activity.
Evaluating the heat index requires understanding its values in the shade and with gentle winds. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'real feel' or 'apparent temperature', reflects the feeling of heat when considering both air temperature and humidity. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. 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. Should the body fail to balance its heat gain, the escalating temperature poses health challenges.

Humidity

The average relative humidity in August is 84%.

Rainfall

In Cozumel, in August, it is raining for 13.4 days, with typically 142mm (5.59") of accumulated precipitation. Throughout the year, there are 119.9 rainfall days, and 1490mm (58.66") of precipitation is accumulated.

Sea temperature

July through October, with an average sea temperature of 29°C (84.2°F), are months with the warmest 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 Cozumel, the average length of the day in August is 12h and 49min.
On the first day of August, sunrise is at 6:22 am and sunset at 7:25 pm. On the last day of the month, sunrise is at 6:31 am and sunset at 7:03 pm EST.

Sunshine

In August, the average sunshine is 7.2h.

UV index

April through August, with an average maximum UV index of 12, are months with the highest UV index in Cozumel. A UV Index reading of 11, and higher, represents an extreme health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The daily high UV index of 12 during August translates into the following recommendations:
Employ all critical precautions. Guarding against sun damage is essential. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Despite the overcast weather, sunscreen with SPF of at least 30 should be applied liberally and reapplied often, particularly after swimming or an outdoor workout. Warning! The reflection of sand and water increases the UV dose.