September weather forecast
Cajazeiras, Brazil

The first month of the spring, September, is still a hot month in Cajazeiras, Brazil, with an average temperature ranging between max 33.8°C (92.8°F) and min 20.9°C (69.6°F).

Temperature

September's onset records a minor alteration in the average high-temperature to a still tropical 33.8°C (92.8°F) from August's 32.8°C (91°F). Marked by a significant temperature drop from daytime highs, the average nighttime temperature lowers to an agreeable 20.9°C (69.6°F) throughout September.

Heat index

The heat index for September is calculated to be a torrid 38°C (100.4°F). Implement heightened safety measures - risk of heat exhaustion and heat cramps is increased. Prolonged activity may result in heatstroke.
From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. The heat index has the possibility to be enhanced by 15 Fahrenheit (8 Celsius) degrees when there is direct sun exposure.
Note: The heat index, also known as 'apparent temperature' or 'feels like', evaluates the perceived heat by adding the effect of moisture in the air. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. When air moisture content is high, the cooling process through evaporation is not as efficient, leading to an ineffective body cooling process and a feeling of overheating. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

The average relative humidity in September in Cajazeiras is 50%.

Rainfall

September is the month with the least rainfall in Cajazeiras. Rain falls for 2.7 days and accumulates 2mm (0.08") of precipitation.

Daylight

In September, the average length of the day in Cajazeiras is 12h and 4min.
On the first day of September in Cajazeiras, sunrise is at 05:34 and sunset at 17:33. On the last day of the month, sunrise is at 05:19 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 Cajazeiras, Brazil, are January through March, August through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for the average person.
Note: The maximum UV index of 7 during September translates into these guidelines:
Shun overexposure. Protection from sun ravages is indispensable. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Tightly woven clothing, when worn loosely, shields effectively against the Sun.