September weather forecastAcará, Brazil

Weather in September

September, the first month of the spring in Acará, is still a tropical month, with an average temperature ranging between max 33.9°C (93°F) and min 21.2°C (70.2°F).

Temperature

Acará measures an average high-temperature of a still tropical 33.9°C (93°F) in September, nearly consistent with the preceding month. September nights in Acará present a stark temperature decrease to a pleasant 21.2°C (70.2°F).

Heat index

The average heat index in September is calculated to be a life-threatening hot 51°C (123.8°F). Careful: Heat exhaustion and heat cramps are anticipated. With ongoing exertion, heatstroke becomes a possibility.
For clarity, heat index numbers account for light winds and areas under shade. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'real feel' or 'apparent temperature', blends air temperature and moisture content to represent the felt temperature to humans. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
As a reaction to high temperatures, the human body begins to perspire, using the evaporation of sweat to lower its temperature. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. Heat absorption that surpasses the body's shedding capability can lead to overheating and varying levels of dehydration.

Humidity

In Acará, the average relative humidity in September is 78%.

Rainfall

In Acará, in September, during 20.4 rainfall days, 33mm (1.3") of precipitation is typically accumulated. In Acará, during the entire year, the rain falls for 306.4 days and collects up to 1513mm (59.57") of precipitation.

Daylight

The average length of the day in September in Acará is 12h and 6min.
On the first day of September in Acará, sunrise is at 06:10 and sunset at 18:14. On the last day of the month, sunrise is at 05:58 and sunset at 18:06 -03.

Sunshine

In Acará, the average sunshine in September is 8.2h.

UV index

May, July through October, with an average maximum UV index of 7, are months with the highest UV index in Acará. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum UV index of 7 during September translates into these guidelines:
Act on precautions and pay attention to sun safety recommendations. Avoidance of sunburn is obligatory. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. Experience reduced UV exposure by about half when donning a wide-brim hat.