September weather forecast
Areia Branca, Brazil

September, the first month of the spring in Areia Branca, is still a tropical month, with an average temperature varying between 22.3°C (72.1°F) and 34°C (93.2°F).
The perfect water temperature of 26.5°C (79.7°F) with 2mm (0.08") of accumulated rainfall and only 2.3 rainfall days, makes September a great period for swimming and other water activities.

Temperature

Transitioning from August to September, Areia Branca observes an average high-temperature of a still hot 34°C (93.2°F), differing subtly from the previous month. In the month of September, Areia Branca witnesses a consistent average low-temperature of 22.3°C (72.1°F).

Heat index

The heat index value for September is evaluated at a blisteringly hot 41°C (105.8°F). Take more safety measures, heat exhaustion and heat cramps are potential outcomes. Persistent activity might lead to heatstroke.
It is emphasized that the heat index's values are meant for shaded zones with mild winds. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
The innate cooling system of the human body revolves around perspiration, with the evaporation of sweat being central to this process. An increase in relative humidity hinders the body's normal cooling function by reducing evaporation, thereby decreasing the rate of body cooling and enhancing the sense of warmth. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.

Humidity

The least humid month is September, with an average relative humidity of 58%.

Rainfall

In Areia Branca, during September, the rain falls for 2.3 days and regularly aggregates up to 2mm (0.08") of precipitation. Throughout the year, in Areia Branca, there are 145 rainfall days, and 500mm (19.69") of precipitation is accumulated.

Sea temperature

The month with the coldest seawater in Areia Branca is September, with an average sea temperature of 26.5°C (79.7°F).
Note: Swimming, diving, and other water-related activities in temperatures between 25°C (77°F) and 29°C (84.2°F) are considered highly enjoyable and satisfying for longer durations without uneasiness.

Daylight

In Areia Branca, the average length of the day in September is 12h and 5min.
On the first day of the month, sunrise is at 05:27 and sunset at 17:28. On the last day of September, sunrise is at 05:13 and sunset at 17:22 -03.

Sunshine

With an average of 9.7h of sunshine, September has the most sunshine of the year in Areia Branca.

UV index

The months with the highest UV index are January through December, with an average maximum UV index of 7. January through December, with an average maximum UV index of 7, are months with the lowest UV index in Areia Branca, Brazil. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: A maximum UV index of 7 in September translates into the following recommendations:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Be alert! The reflection of water and sand augments UV radiation intensity.