September weather forecastIsla, Mexico

Weather in September

September, the first month of the autumn in Isla, is still a hot month, with an average temperature varying between 30.9°C (87.6°F) and 22.4°C (72.3°F).

Temperature

The average high-temperature for September is a still tropical 30.9°C (87.6°F), closely aligning with the temperature of the preceding month. An average temperature of 22.4°C (72.3°F) is recorded in Isla during the nights in September.

Heat index

The heat index in September is calculated to be a scorching 42°C (107.6°F). Implement heightened safety measures - risk of heat exhaustion and heat cramps is increased. Prolonged activity may result in heatstroke.
Heat index determinations are made taking into account the shade and light air movements. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
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 influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.
When it comes to cooling down, the human body's primary method is through perspiration, making use of sweat evaporation to eliminate excess heat. With higher relative humidity, the rate of evaporation is reduced, resulting in increased heat retention in the body compared to drier air. With body temperatures on the rise, inefficient heat shedding can lead to dehydration and its associated complications.

Humidity

The months with the highest humidity in Isla are September through December, with an average relative humidity of 84%.

Rainfall

The month with the most rainfall is September, when the rain falls for 27.2 days and typically aggregates up to 156mm (6.14") of precipitation.

Daylight

In Isla, Mexico, the average length of the day in September is 12h and 14min.
On the first day of September in Isla, sunrise is at 6:07 am and sunset at 6:35 pm. On the last day of the month, sunrise is at 6:12 am and sunset at 6:11 pm CST.

Sunshine

In September, the average sunshine is 8.3h.

UV index

In September, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: A maximum UV index of 6 in September translates into the following recommendations:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.