September weather forecast
Barcarena, Brazil

September, the first month of the spring in Barcarena, is still a tropical month, with an average temperature varying between 23.3°C (73.9°F) and 33.5°C (92.3°F).

Temperature

The arrival of September sees an average high-temperature of a still tropical 33.5°C (92.3°F), hardly diverging from August's 32.8°C (91°F). During September, Barcarena records an average temperature of 23.3°C (73.9°F) at night.

Heat index

For most parts of September, the heat index is estimated at a life-threatening hot 47°C (116.6°F). Caution: Heat cramps along with heat exhaustion are expected. Sustained activity could lead to heatstroke.
Factoring in the heat index, values are geared towards shaded areas with light breezes. 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', is a value derived by merging air temperature with the humidity to convey how the climate feels. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Kids are generally in more danger than adults because they perspire less. Their large skin surface area compared to their small bodies and the excessive heat due to their actions raises their risk.
Perspiring is a crucial mechanism for the human body, allowing it to release excessive warmth through evaporating sweat. Elevated relative humidity diminishes evaporation, thereby reducing the body's ability to shed heat and creating a feeling of being too warm. Overheating risks increase with rising body temperatures, especially if heat release isn't efficient.

Humidity

In Barcarena, the average relative humidity in September is 74%.

Rainfall

The month with the least rainfall in Barcarena is September, when the rain falls for 19.1 days and typically collects 36mm (1.42") of precipitation.

Sea temperature

The months with the coldest seawater are September and October, with an average sea temperature of 27.8°C (82°F).
Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

In September, the average length of the day in Barcarena is 12h and 6min.
On the first day of the month, sunrise is at 06:11 and sunset at 18:16. On the last day of September, sunrise is at 06:00 and sunset at 18:07 -03.

Sunshine

The average sunshine in September is 8.7h.

UV index

The months with the highest UV index are January through March, May through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: A maximum UV index of 7 in September translates into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Note! The Sun's UV radiation gets intensified with the reflection from sand and water.