September weather forecast
São João do Rio do Peixe, Brazil

The first month of the spring, September, is also a hot month in São João do Rio do Peixe, Brazil, with temperature in the range of an average low of 20.5°C (68.9°F) and an average high of 33.5°C (92.3°F).

Temperature

São João do Rio do Peixe, Brazil, experiences a minor change to a still tropical 33.5°C (92.3°F) in average high-temperature during September, closely reflecting August. São João do Rio do Peixe experiences a significant downturn from peak daytime temperatures throughout September, with the average low-temperature dipping to an agreeable 20.5°C (68.9°F).

Heat index

In September, the heat index is computed to be a fiery hot 37°C (98.6°F). Implement additional cautionary measures, heat cramps and heat exhaustion could occur. Prolonged activity might induce heatstroke.
In terms of the heat index, values are set with light wind and shade conditions in mind. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', gauges the sensation of temperature factoring in the air's moisture content. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. Relative humidity in excess curtails evaporation, therefore reducing heat dissipation from the body, leading to feelings of excess heat. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.

Humidity

The average relative humidity in September in São João do Rio do Peixe is 50%.

Rainfall

The month with the least rainfall is September, when the rain falls for 2.9 days and typically collects 2mm (0.08") of precipitation.

Daylight

The average length of the day in September is 12h and 4min.
On the first day of September, sunrise is at 05:33 and sunset at 17:33. On the last day of the month, sunrise is at 05:18 and sunset at 17:28 -03.

Sunshine

September has the most sunshine of the year, with an average of 9.8h of sunshine.

UV index

The months with the highest UV index in São João do Rio do Peixe, Brazil, are March, August through December, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: In September, the average maximum UV index of 7 translates into the following recommendations:
Enforce precautions and stick to sun safety measures. Preservation from skin and eye damage is essential. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.