September weather forecast
São Pedro do Piauí, Brazil

September, the first month of the spring in São Pedro do Piauí, is also a fiery hot month, with temperature in the range of an average low of 23.1°C (73.6°F) and an average high of 36.4°C (97.5°F).

Temperature

Transitioning into September, São Pedro do Piauí records an average high-temperature of a still fiery hot 36.4°C (97.5°F), almost identical to August's 35.1°C (95.2°F). During September, São Pedro do Piauí reports a marked contrast from daily peak temperatures, with an average nighttime reading of 23.1°C (73.6°F).

Heat index

In September, the heat index is estimated at a blistering 43°C (109.4°F). Remain cautious: Heat cramps along with heat exhaustion are foreseeable. Ongoing activity may precipitate heatstroke.
When assessing, remember that heat index measurements are for light winds and shaded spots. Direct exposure to sunlight could raise the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', comes about by integrating the temperature readings with the humidity levels. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. During high air temperature and humidity (high heat index), the process of perspiration is hindered, intensifying the sensation of heat. The body faces dehydration threats when its cooling efforts are outpaced by excessive heat gain.

Humidity

September is the least humid month in São Pedro do Piauí, with an average relative humidity of 48%.

Rainfall

September is the month with the least rainfall in São Pedro do Piauí. Rain falls for 5.7 days and accumulates 8mm (0.31") of precipitation.

Daylight

The average length of the day in September is 12h and 5min.
On the first day of September in São Pedro do Piauí, sunrise is at 05:50 and sunset at 17:50. On the last day of the month, sunrise is at 05:35 and sunset at 17:45 -03.

Sunshine

September has the most sunshine of the year in São Pedro do Piauí, Brazil, with an average of 9.7h of sunshine.

UV index

The months with the highest UV index in São Pedro do Piauí are January, March 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 radiation for the ordinary person.
Note: A daily high UV index of 7 in September leads to these guidelines:
Resist extreme sun exposure. Guarding against solar damage is essential. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.