September weather forecast
Parnaguá, Brazil

The first month of the spring, September, is also a hot month in Parnaguá, Brazil, with an average temperature fluctuating between 20.5°C (68.9°F) and 34.9°C (94.8°F).

Temperature

September welcomes an average high-temperature of a still tropical 34.9°C (94.8°F), not much different from the preceding month. Nightly average temperatures in September reveal a significant dip from daytime highs in Parnaguá, registering a consistent an agreeable 20.5°C (68.9°F).

Heat index

The heat index for September is calculated to be a torrid 37°C (98.6°F). Undertake extra safety actions, heat cramps and heat exhaustion are expected. Heatstroke may result from lengthy activity.
Bear in mind that the heat index values are determined for shaded areas and light breezes. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. Keep it in mind, direct sunlight can augment the heat you experience, possibly pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
Perspiration, followed by sweat evaporation, is the human body's chief method to maintain a balanced temperature. 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. Overheating dangers loom when the body's heat release mechanisms are overshadowed by excessive gain.

Humidity

With an average relative humidity of 40%, September is the least humid month.

Rainfall

January through July, September through December are months with rainfall. September is the first month it rains. Throughout September, in the average 1.3 rainfall days, it receives 5mm (0.2") of precipitation. In Parnaguá, during the entire year, the rain falls for 134.3 days and collects up to 578mm (22.76") of precipitation.

Daylight

In Parnaguá, Brazil, the average length of the day in September is 12h and 3min.
On the first day of the month, sunrise is at 06:00 and sunset at 17:56. On the last day of September, sunrise is at 05:42 and sunset at 17:54 -03.

Sunshine

In September, the average sunshine is 9.6h.

UV index

August through October, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for the average person.
Note: In September, the maximum UV index of 7 transforms into these recommendations:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. A hat with a broad brim is indispensable, filtering out up to half of UV rays.