September weather forecast
Manacapuru, Brazil

September, the first month of the spring in Manacapuru, is a sweltering month, with temperature in the range of an average high of 35.5°C (95.9°F) and an average low of 23.8°C (74.8°F).

Temperature

Temperature records mark September as the warmest month, with highs averaging 35.5°C (95.9°F) and lows at 23.8°C (74.8°F).

Heat index

The heat index for September is calculated to be a life-threatening hot 48°C (118.4°F). Prudent: Heat cramps and heat exhaustion are likely. Heatstroke becomes imminent with sustained exertion.
Keep in mind the heat index values are meant for areas in shade and with light wind. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. Factors such as metabolic variations, being pregnant, and physical activity can impact an individual's weather perception. 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 are extremely significant for children. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
The natural method the human body uses to remove excess heat is by perspiring and letting sweat evaporate. An increase in relative humidity retards evaporation, subsequently reducing the body's heat removal rate and leading to a sensation of being overly warm. Heat-related challenges, like dehydration, can be anticipated when body heat isn't managed effectively.

Humidity

With an average relative humidity of 62%, September is the least humid month in Manacapuru.

Rainfall

In Manacapuru, in September, during 14.7 rainfall days, 37mm (1.46") of precipitation is typically accumulated. In Manacapuru, during the entire year, the rain falls for 269.3 days and collects up to 1638mm (64.49") of precipitation.

Daylight

In Manacapuru, Brazil, the average length of the day in September is 12h and 5min.
On the first day of the month, sunrise is at 06:00 and sunset at 18:03. On the last day of September, in Manacapuru, Brazil, sunrise is at 05:48 and sunset at 17:56 -04.

Sunshine

The month with the most sunshine is September, with an average of 10h of sunshine.

UV index

February, June through November, with an average maximum UV index of 7, are months with the highest UV index in Manacapuru. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for average individuals.
Note: The UV index of 7 during September translates into the following guidance:
Stick with precautions and abide by sun safety procedures. Evading sunburn is essential. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.