September weather forecastUpanema, Brazil

Weather in September

The first month of the spring, September, is still a hot month in Upanema, Brazil, with temperature in the range of an average high of 34.7°C (94.5°F) and an average low of 22.2°C (72°F).

Temperature

September notes an average high-temperature of a still hot 34.7°C (94.5°F), subtly differing from August's 33.8°C (92.8°F). Upanema, amid September nights, sees a noteworthy disparity from daily highs with an average temperature of 22.2°C (72°F).

Heat index

For September, the heat index is estimated at a scorching 42°C (107.6°F). Adopt enhanced safety measures, heat exhaustion and heat cramps could occur. Continuous activity may induce heatstroke.
Evaluating the heat index requires understanding its values in the shade and with gentle winds. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. An upsurge in relative humidity affects normal body cooling mechanisms by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.

Humidity

The months with the lowest humidity are September and October, with an average relative humidity of 55%.

Rainfall

In Upanema, in September, it is raining for 2.4 days, with typically 3mm (0.12") of accumulated precipitation. In Upanema, during the entire year, the rain falls for 112.4 days and collects up to 381mm (15") of precipitation.

Daylight

In September, the average length of the day is 12h and 5min.
On the first day of the month, sunrise is at 05:28 and sunset at 17:29. On the last day of September, sunrise is at 05:14 and sunset at 17:23 -03.

Sunshine

September has the most sunshine of the year in Upanema, Brazil, with an average of 9.6h of sunshine.

UV index

The months with the highest UV index are January through December, with an average maximum UV index of 7. The months with the lowest UV index in Upanema are January through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: The UV index of 7 during September translates into the following guidance:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. 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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.