September weather forecast
Puerto Morelos, Mexico

September carries the monsoon further with 130mm (5.12") of rain, making it the second-wettest month in the Puerto Morelos calendar. Simultaneously, there is a slight decrease in temperature as the summer heat begins to recede. Despite the shortening of daylight hours, the sun prevails for a majority of the day, ensuring sufficient sun exposure. The consistent humidity and moderately warm sea extend the pleasure of beach activities for tourists. With summer starting to wane, evenings bring cooler temperatures, creating a pleasant contrast.

Temperature

Puerto Morelos's shift into September sets the average high-temperature at a still hot 30.5°C (86.9°F), a figure that deviates only slightly from August's 31.1°C (88°F). Puerto Morelos records a negligible downturn from daytime temperatures, averaging a low of 26.5°C (79.7°F) in the month of September.

Heat index

For most parts of September, the heat index is appraised at a fiery hot 39°C (102.2°F). Adopt heightened preventive measures, heat exhaustion and heat cramps are probable. Persistent activity could lead to heatstroke.
Be aware that heat index ratings are designed for shaded locations and minor breezes. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', provides an understanding of perceived warmth by combining temperature and relative humidity. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
Perspiration, followed by sweat evaporation, is the human body's chief method to maintain a balanced temperature. Elevated relative humidity disrupts typical body cooling by reducing the evaporation rate, consequently decreasing the body's cooling rate and enhancing the feeling of heat. Overheating dangers loom when the body's heat release mechanisms are overshadowed by excessive gain.

Humidity

In September, the average relative humidity is 78%.

Rainfall

In Puerto Morelos, Mexico, in September, it is raining for 24.8 days, with typically 130mm (5.12") of accumulated precipitation. In Puerto Morelos, during the entire year, the rain falls for 227.4 days and collects up to 1021mm (40.2") of precipitation.

Sea temperature

July through October, with an average sea temperature of 29°C (84.2°F), are months with the warmest seawater.
Note: For engaging in any water activities, temperatures from 25°C (77°F) to 29°C (84.2°F) are viewed as outstanding and exceptionally pleasing for prolonged durations.

Daylight

In September, the average length of the day is 12h and 15min.
On the first day of the month, sunrise is at 6:31 am and sunset at 7:03 pm. On the last day of September, sunrise is at 6:38 am and sunset at 6:36 pm EST.

Sunshine

In Puerto Morelos, the average sunshine in September is 9h.

UV index

February through October, with an average maximum UV index of 7, are months with the highest UV index in Puerto Morelos. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum daily UV index of 7 in September converts into the following recommendations:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Beware! Reflecting off water and sand, UV rays are much stronger.