September weather forecastMansidão, Brazil

Weather in September

The first month of the spring, September, is also a hot month in Mansidão, Brazil, with an average temperature varying between 34.9°C (94.8°F) and 20.5°C (68.9°F).

Temperature

September denotes a minimal variation in the average high-temperature to a still hot 34.9°C (94.8°F) from August's 32.9°C (91.2°F). Throughout September nights, a significant departure from daytime temperatures, with an average low of 20.5°C (68.9°F), is recognized.

Heat index

For most parts of September, the heat index is estimated at a fiery hot 37°C (98.6°F). Take extra safety measures to prevent heat exhaustion and heat cramps. Heatstroke could follow lengthy activity.
Realize that the values for the heat index are set for shaded places and light winds. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a measure of how hot it feels when the actual air humidity is factored in. Additional elements including metabolic differences, the level of physical activity, and attire have a role in shaping the individual's temperature perception. 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 extremely significant for children. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
The physiological response of the human body to excess warmth is to perspire, thereby cooling itself through sweat evaporation. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. When the body's heat gain surpasses its removal capacity, body temperature starts to climb, leading to potential heat-related ailments.

Humidity

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

Rainfall

Months with rainfall are January through July, September through December. September is the first month it rains in Mansidão. Throughout September, in the average 1.3 rainfall days, it receives 5mm (0.2") of precipitation. In Mansidão, during the entire year, the rain falls for 134.3 days and collects up to 578mm (22.76") of precipitation.

Daylight

In September, the average length of the day is 12h and 3min.
On the first day of the month, sunrise is at 05:58 and sunset at 17:53. On the last day of September, sunrise is at 05:40 and sunset at 17:51 -03.

Sunshine

The average sunshine in September is 9.6h.

UV index

The months with the highest UV index are August through October, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for the average person.
Note: A maximum high daily UV index of 7 during September translates into the following directions:
Deflect overexposure. Sun protection is a necessity. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.