September weather forecastPuerto Morelos, Mexico

Weather in September

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

September's onset brings an average high-temperature of a still tropical 30.5°C (86.9°F), showing a minute difference from August's 31.1°C (88°F). Puerto Morelos's September nights witness minimal differential from the daytime temperatures, with averages of 26.5°C (79.7°F).

Heat index

The heat index for September is estimated at a fiery hot 39°C (102.2°F). Exercise increased caution, heat cramps and heat exhaustion are potential hazards. Continuous activity could lead to heatstroke.
One should be cognizant that the heat index values are tailored for shaded spots and mild winds. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. Being under direct sunshine can magnify the heat experience, possibly pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. When there is abundant moisture in the air, the body's cooling through the evaporation process becomes less effective, leading to the sensation of overheating. Overheating dangers loom when the body's heat release mechanisms are overshadowed by excessive gain.

Humidity

The average relative humidity in September is 78%.

Rainfall

In Puerto Morelos, in September, it is raining for 24.8 days, with typically 130mm (5.12") of accumulated precipitation. Throughout the year, in Puerto Morelos, there are 227.4 rainfall days, and 1021mm (40.2") 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: Surface water temperatures falling between 25°C (77°F) and 29°C (84.2°F) are regarded as prime and extremely agreeable for enduring periods during any water activity.

Daylight

The average length of the day in September is 12h and 15min.
On the first day of September, sunrise is at 6:31 am and sunset at 7:03 pm. On the last day of the month, 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. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The daily high UV index of 7 in September translates into this advice:
Fend off overexposure. Sun protection is vital. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Caution! The reflection of sand and water significantly amplifies the Sun's UV radiation.