Maceió greets
September with an uptick in temperature alongside reduced rain. Notably, the volume of rainfall falls again, allowing the city to dry more thoroughly from the previous rains. Sunshine hours and daylight lengths continue to compete with each other, providing the city with pleasingly radiant days. Along with the deceasing rainfall, the humidity also reduces gradually. Hence, the onset of September signals a clear, sunnier, and less humid Maceió than the preceding months.
Temperature
Maceió records an average high-temperature of a still moderately hot 27.8°C (82°F) in September, closely mirroring the climate of the previous month. September nights are marked by an average temperature drop to an agreeable 20.7°C (69.3°F).
Heat index
September's heat index is evaluated at a tropical 31°C (87.8°F). Long-standing exposure and activity could induce a feeling of tiredness and lead to heat cramps.
From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. Keep it in mind, direct sunlight can augment the heat you experience, possibly pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
Humidity
The average relative humidity in September in Maceió is 77.2%.
Rainfall
In Maceió, in September, during 15 rainfall days, 130mm (5.12") of precipitation is typically accumulated. In Maceió, during the entire year, the rain falls for 185 days and collects up to 2071mm (81.54") of precipitation.
Sea temperature
In September, the average sea temperature in Maceió is 26.3°C (79.3°F).
Note: Swimming, diving, and other water activities in the temperature range of 25°C (77°F) to 29°C (84.2°F) are perceived as very enjoyable and comfortable for prolonged durations.
Daylight
In September, the average length of the day in Maceió is 12h and 3min.
On the first day of the month, sunrise is at 05:24 and sunset at 17:20. On the last day of September, in Maceió, sunrise is at 05:07 and sunset at 17:18 -03.
Sunshine
In September, the average sunshine in Maceió is 6.8h.
UV index
January through
April, September through
December, with an average maximum UV index of 12, are months with the highest UV index. A UV Index reading of 11, and higher, represents an ultimate health vulnerability from exposure to the Sun's UV rays for the average person.
Note: A maximum high daily UV index of 12 during September translates into the following directions:
Undertake all key precautions, as unprotected skin and eyes may get burns in no time. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Broad-spectrum sunscreen with an SPF of 30 or more should be applied liberally every two hours and directly after outdoor activities or swimming. Attention! UV radiation is markedly stronger with water and sand reflections.