September weather forecast
Formosa do Rio Preto, Brazil

September, the first month of the spring in Formosa do Rio Preto, is also a hot month, with an average temperature ranging between max 34.9°C (94.8°F) and min 20.5°C (68.9°F).

Temperature

The transition into September is marked with an average high-temperature of a still hot 34.9°C (94.8°F), showing an insignificant shift from August's 32.9°C (91.2°F). September is characterized by a distinct thermal shift, with nighttime lows averaging at a pleasant 20.5°C (68.9°F).

Heat index

September's average heat index is calculated to be a very hot 37°C (98.6°F). Incorporate extra safety measures to avoid heat exhaustion and heat cramps. Continuous activity could provoke heatstroke.
Given the heat index, its values are aligned with shaded sites and gentle winds. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is achieved by amalgamating air temperature with the relative humidity readings. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
Humans rely on perspiration as a cooling mechanism, wherein the evaporating sweat counteracts excessive warmth. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. Should the body fail to balance its heat gain, the escalating temperature poses health challenges.

Humidity

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

Rainfall

Months with rainfall in Formosa do Rio Preto are January through July, September through December. September is the first month it rains in Formosa do Rio Preto, Brazil. Throughout September, in the average 1.3 rainfall days, it receives 5mm (0.2") of precipitation. Throughout the year, in Formosa do Rio Preto, there are 134.3 rainfall days, and 578mm (22.76") of precipitation is accumulated.

Daylight

In September, the average length of the day is 12h and 3min.
On the first day of the month, sunrise is at 06:03 and sunset at 17:57. On the last day of September, sunrise is at 05:44 and sunset at 17:56 -03.

Sunshine

In Formosa do Rio Preto, the average sunshine in September is 9.6h.

UV index

The months with the highest UV index in Formosa do Rio Preto are August through October, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: The daily high UV index of 7 during September translates into the following recommendations:
Stand by precautions and apply sun safety measures. Evading sunburn is of great importance. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.