September weather forecastRio Uaçá, Brazil

Weather in September

The first month of the autumn, September, is also a hot month in Rio Uaçá, Brazil, with an average temperature varying between 22°C (71.6°F) and 33.6°C (92.5°F).

Temperature

Rio Uaçá's entry into September measures an average high-temperature of a still hot 33.6°C (92.5°F), closely parallel to the preceding month. An average low-temperature of 22°C (71.6°F) is noted during the month of September.

Heat index

The heat index value for September is calculated to be a burning hot 48°C (118.4°F). Remain alert: Heat exhaustion and heat cramps are predicted. Extended effort can lead to heatstroke.
When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'real feel' or 'feels like', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.
Evaporation of sweat is the main factor behind the cooling effect of perspiration in the human body. An upsurge in relative humidity affects normal body cooling mechanisms by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Rising body temperatures due to excess heat retention could signify impending heat disorders.

Humidity

In Rio Uaçá, the average relative humidity in September is 76%.

Rainfall

In Rio Uaçá, during September, the rain falls for 11.8 days and regularly aggregates up to 21mm (0.83") of precipitation. Throughout the year, there are 280.4 rainfall days, and 1281mm (50.43") of precipitation is accumulated.

Daylight

In Rio Uaçá, the average length of the day in September is 12h and 8min.
On the first day of September, sunrise is at 06:19 and sunset at 18:30. On the last day of the month, sunrise is at 06:12 and sunset at 18:17 -03.

Sunshine

The month with the most sunshine is September, with an average of 8.8h of sunshine.

UV index

July through November, with an average maximum UV index of 7, are months with the highest UV index in Rio Uaçá, Brazil. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The UV index of 7 during September translates into the following guidance:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.