September weather forecast
Luís Domingues, Brazil

The first month of the spring, September, is still a warm month in Luís Domingues, Brazil, with an average temperature ranging between min 25.2°C (77.4°F) and max 29.6°C (85.3°F).

Temperature

The advent of September brings an average high-temperature of a still moderately hot 29.6°C (85.3°F), exhibiting minor difference from the previous month. Recording a slight drop from the daily maximum, Luís Domingues notes an average low temperature of 25.2°C (77.4°F) in the month of September.

Heat index

During September, the heat index is evaluated at a torrid 36°C (96.8°F). Extra safeguards are necessary to prevent heat exhaustion and heat cramps. Prolonged activity might cause heatstroke.
Heat index data is primarily for areas with shade and subjected to light winds. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'real feel' or 'apparent temperature', arises from combining readings of air temperature and relative moisture content. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.

Humidity

In Luís Domingues, Brazil, the average relative humidity in September is 78%.

Rainfall

In Luís Domingues, during September, the rain falls for 15.8 days and regularly aggregates up to 25mm (0.98") of precipitation. In Luís Domingues, Brazil, during the entire year, the rain falls for 270.2 days and collects up to 1756mm (69.13") of precipitation.

Daylight

In Luís Domingues, the average length of the day in September is 12h and 7min.
On the first day of September, sunrise is at 06:00 and sunset at 18:05. On the last day of the month, sunrise is at 05:49 and sunset at 17:56 -03.

Sunshine

In September, the average sunshine is 8.9h.

UV index

January through March, May through December, with an average maximum UV index of 7, are months with the highest UV index in Luís Domingues. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: The daily high UV index of 7 in September translates into this advice:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Experience reduced UV exposure by about half when donning a wide-brim hat.