September weather forecast
Isaías Coelho, Brazil

The first month of the spring, September, is a torrid month in Isaías Coelho, Brazil, with temperature in the range of an average low of 21.8°C (71.2°F) and an average high of 35.5°C (95.9°F).

Temperature

The average high-temperature for September is a torrid 35.5°C (95.9°F), closely aligning with the temperature of the preceding month. September nights present a sharp contrast to daytime highs, with average temperatures of 21.8°C (71.2°F).

Heat index

During September, the heat index is calculated to be a very hot 39°C (102.2°F). Take more preventive steps, risk of heat exhaustion and heat cramps is elevated. Long activity may culminate in heatstroke.
In reference to the heat index, it's for places in shade and with a slight wind. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', blends air temperature and moisture content to represent the felt temperature to humans. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. Keep in mind that direct sunshine exposure can amplify the weather's effects, possibly increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.
Evaporating sweat is a key way the human body dispels excessive warmth, all thanks to the process of perspiration. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. Should the body fail to balance its heat gain, the escalating temperature poses health challenges.

Humidity

The least humid month in Isaías Coelho, Brazil, is September, with an average relative humidity of 42%.

Rainfall

Months with rainfall are January through July, September through December. September is the first month it rains. Throughout September, in the average 1.5 rainfall days, it receives 2mm (0.08") of precipitation. In Isaías Coelho, during the entire year, the rain falls for 152.5 days and collects up to 872mm (34.33") of precipitation.

Daylight

The average length of the day in September in Isaías Coelho, Brazil, is 12h and 4min.
On the first day of the month, sunrise is at 05:47 and sunset at 17:45. On the last day of September, in Isaías Coelho, sunrise is at 05:31 and sunset at 17:41 -03.

Sunshine

The months with the most sunshine are August and September, with an average of 9.9h of sunshine.

UV index

The months with the highest UV index are September and October, with an average maximum UV index of 8. A UV Index estimate of 8 to 10 represents a very high health risk from unsafe exposure to UV radiation for the ordinary person.
Note: The UV index of 8 during September translates into the following guidance:
Take extra precautions. Protection against sun damage is required. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.