September weather forecast
Vargem Grande, Brazil

September, the first month of the spring in Vargem Grande, is still a hot month, with temperature in the range of an average high of 34.5°C (94.1°F) and an average low of 22.5°C (72.5°F).

Temperature

The transition into September is marked with an average high-temperature of a still tropical 34.5°C (94.1°F), showing an insignificant shift from August's 32.9°C (91.2°F). Vargem Grande registers a prominent dip from daytime highs, with an average of 22.5°C (72.5°F) during the nights of September.

Heat index

For September, the heat index is computed to be a burning hot 49°C (120.2°F). Keep alert: Heat cramps and heat exhaustion are probable. Heatstroke is a potential danger with continued physical activity.
Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', provides an understanding of perceived warmth by combining temperature and relative humidity. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. It is essential to be conscious of the fact that direct sunlight can intensify the felt heat, leading to an elevation in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Younglings frequently fail to recognize the requirement to rest and rehydrate. Thirst emerges late in dehydration - it is imperative to keep hydration levels high, particularly during extended physical exertions.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. An increase in relative humidity disrupts body cooling by slowing the evaporation rate, thereby reducing the rate at which the body cools and amplifying the sense of heat. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.

Humidity

In Vargem Grande, the average relative humidity in September is 70%.

Rainfall

August and September are months with the least rain in Vargem Grande when the rain falls for 14.6 days and typically aggregates up to 22mm (0.87") of rain.

Daylight

In Vargem Grande, the average length of the day in September is 12h and 5min.
On the first day of the month, sunrise is at 05:54 and sunset at 17:56. On the last day of September, in Vargem Grande, Brazil, sunrise is at 05:41 and sunset at 17:49 -03.

Sunshine

In September, the average sunshine in Vargem Grande is 8.2h.

UV index

The months with the highest UV index are May, July through November, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: In September, a daily maximum UV index of 7 leads to the following instructions:
Take precautions against overexposure. Protection against sun damage is needed. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.