September weather forecast
Portel, Brazil

The first month of the spring, September, is a very hot month in Portel, Brazil, with temperature in the range of an average high of 35.1°C (95.2°F) and an average low of 22.5°C (72.5°F).

Temperature

The onset of September notes an average high-temperature of a fiery hot 35.1°C (95.2°F), subtly shifted from August's 34.5°C (94.1°F). Portel logs a substantial downturn to an agreeable 22.5°C (72.5°F) during September nights, a considerable shift from daytime highs.

Heat index

For most parts of September, the heat index is computed to be a blazing hot 52°C (125.6°F). Take note: Heat exhaustion and heat cramps are expected. Heatstroke can occur with prolonged effort.
Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. Exposing to direct sunshine may enhance heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', reflects the feeling of heat when considering both air temperature and humidity. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. 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 particularly relevant to children. Young kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.
The human body keeps its cool primarily through perspiration, as this process enables sweat to evaporate, taking away the excess heat. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. As body temperatures escalate without effective heat release, one might face dehydration threats.

Humidity

In Portel, Brazil, the average relative humidity in September is 72%.

Rainfall

The month with the least rainfall in Portel is September, when the rain falls for 15.2 days and typically collects 23mm (0.91") of precipitation.

Daylight

In Portel, the average length of the day in September is 12h and 6min.
On the first day of the month, sunrise is at 06:20 and sunset at 18:25. On the last day of September, in Portel, Brazil, sunrise is at 06:09 and sunset at 18:16 -03.

Sunshine

In Portel, the average sunshine in September is 8.7h.

UV index

May through November, with an average maximum UV index of 7, are months with the highest UV index in Portel. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for the average person.
Note: In September, the maximum UV index of 7 suggests these recommendations:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.