September weather forecast
Soure, Brazil

September, the first month of the spring in Soure, is still a tropical month, with temperature in the range of an average low of 25.8°C (78.4°F) and an average high of 30.9°C (87.6°F).

Temperature

The arrival of September is marked by an average high-temperature of a still tropical 30.9°C (87.6°F), bearing a close resemblance to August. An average nighttime temperature of 25.8°C (78.4°F) is noted in Soure during the month of September.

Heat index

During September, the heat index is estimated at a fiery hot 39°C (102.2°F). Ensure heightened precautions, risk of heat cramps and heat exhaustion is significant. Sustained activity could provoke heatstroke.
Data suggests that the heat index is set for environments in shade and with a light wind. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are of high significance for children. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. Under conditions of high relative humidity, the rate of evaporation decreases. This results in the body retaining more heat than under conditions of dry air. Should the body fail to balance its heat gain, the escalating temperature poses health challenges.

Humidity

In Soure, the average relative humidity in September is 74%.

Rainfall

In Soure, Brazil, during September, the rain falls for 16.5 days and regularly aggregates up to 39mm (1.54") of precipitation. In Soure, during the entire year, the rain falls for 296.2 days and collects up to 2404mm (94.65") of precipitation.

Sea temperature

In Soure, the average seawater temperature in September is 28.4°C (83.1°F).
Note: Engaging in water activities, such as swimming or diving, in temperatures from 25°C (77°F) to 29°C (84.2°F) is very pleasurable for extended periods, without any discomfort.

Daylight

In Soure, the average length of the day in September is 12h and 7min.
On the first day of September in Soure, sunrise is at 06:10 and sunset at 18:16. On the last day of the month, sunrise is at 06:00 and sunset at 18:07 -03.

Sunshine

In Soure, the average sunshine in September is 9h.

UV index

The months with the highest UV index in Soure are February, March, May through December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for average individuals.
Note: In September, the maximum UV index of 7 translates into these guidelines:
Persist in precautions and follow sun safety policies. Keeping sunburn at bay is imperative. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Be careful! The Sun's UV radiation is accentuated by reflecting off sand and water.