September weather forecast and climate
Maceió, Brazil

The first month of the spring, September, is also a moderately hot month in Maceió, Brazil, with average temperature ranging between min 20.7°C (69.3°F) and max 27.8°C (82°F).

Temperature

In September, the average high-temperature is essentially the same as in August - a still warm 27.8°C (82°F). In September, the average low-temperature is 20.7°C (69.3°F).

Heat index

In September, the average heat index is evaluated at a tropical 31.2°C (88.2°F). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'apparent temperature', 'felt air temperature', or 'real feel', combines air temperature and relative humidity to represent a human perceived temperature equivalent. This effect is individual, with diverse people perceiving weather differently for numerous reasons (metabolic differences, differences in body mass, height, and shape, clothing), and activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

In Maceió, the average relative humidity is 77.2%.

Rainfall

In Maceió, during September, the rain falls for 15 days and regularly aggregates up to 130.3mm (5.13") of precipitation. Throughout the year, in Maceió, there are 185 rainfall days, and 2070.7mm (81.52") of precipitation is accumulated.

Sea temperature

In Maceió, the average seawater temperature in September is 26.3°C (79.3°F).
Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

The average length of the day in Maceió is 12.1h.

Sunshine

In Maceió, the average sunshine 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 in Maceió. A UV Index value of 11, and more, symbolizes an excessive health risk from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: In September, the average maximum UV index of 12 translate into the following recommendations:
Practice all essential precautions. Protection against sun damage is crucial. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.