September weather forecastPrainha, Brazil
September
Weather in September
The first month of the spring, September, is a very hot month in Prainha, Brazil, with an average temperature fluctuating between 35.6°C (96.1°F) and 23.9°C (75°F).Temperature
Prainha's September average high-temperature settles at a fiery hot 35.6°C (96.1°F), showing a near match with the preceding month. Prainha reports an average nighttime low-temperature of 23.9°C (75°F) in September.Heat index
September's mean heat index is calculated to be a burning hot 47°C (116.6°F). Alert: Heat cramps and heat exhaustion are likely to occur. Prolonged exertion can lead to heatstroke.The metrics for the heat index are tailored for both shady environments and light winds. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', gauges the sensation of temperature factoring in the air's moisture content. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Juveniles often do not understand the need to recuperate and rehydrate. Thirst is a delayed symptom of dehydration - hence, it is vital to maintain hydration, particularly during ongoing physical activities.
Evaporating sweat is a key way the human body dispels excessive warmth, all thanks to the process of perspiration. 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. When the body is unable to balance heat gain, its temperature elevates, which may induce thermal illnesses.
Humidity
In Prainha, the average relative humidity in September is 61%.Rainfall
September is the month with the least rainfall in Prainha. Rain falls for 11 days and accumulates 20mm (0.79") of precipitation.Daylight
In Prainha, the average length of the day in September is 12h and 6min.On the first day of the month, sunrise is at 06:31 and sunset at 18:36. On the last day of September, in Prainha, sunrise is at 06:19 and sunset at 18:27 -03.
Sunshine
The months with the most sunshine in Prainha are August and September, with an average of 9.6h of sunshine.UV index
With an average maximum UV index of 8, September is the month with the highest UV index. A UV Index estimate of 8 to 10 represents a very high health risk from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index of 8 during September leads to these instructions:
Prioritize your safety. Without precautions, skin and eyes might get hurt quickly. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Prainha, Brazil
- Average high temperature in September: 35.6°C
The warmest month (with the highest average high temperature) is October (36.1°C).
The month with the lowest average high temperature is April (30°C).
- Average low temperature in September: 23.9°C
The month with the highest average low temperature is October (24.8°C).
The coldest month (with the lowest average low temperature) is July (22.6°C).
Average pressure in September
Prainha, Brazil
- Average pressure in September: 1010.9mbar
The months with the highest atmospheric pressure are June and July (1012.6mbar).
The month with the lowest atmospheric pressure is November (1008.4mbar).
Average wind speed in September
Prainha, Brazil
- Average wind speed in September: 8.2km/h
The windiest month (with the highest average wind speed) is September (8.2km/h).
The calmest month (with the lowest average wind speed) is April (5.9km/h).
Average humidity in September
Prainha, Brazil
- Average humidity in September: 61%
The month with the highest relative humidity is April (87%).
The month with the lowest relative humidity is October (60%).
Average rainfall in September
Prainha, Brazil
- Average rainfall in September: 20mm
The wettest month (with the highest rainfall) is April (213mm).
The driest month (with the least rainfall) is September (20mm).
Average rainfall days in September
Prainha, Brazil
- Average rainfall days in September: 11 days
The month with the highest number of rainy days is March (28.8 days).
The month with the least rainy days is August (9.8 days).
Average daylight in September /
Average sunshine in September
Prainha, Brazil
- Average daylight in September: 12h and 6min
The month with the longest days is December (Average daylight: 12h and 12min).
The month with the shortest days is June (Average daylight: 12h and 0min).
- Average sunshine in September: 9h and 36min
The months with the most sunshine are August and September (Average sunshine: 9h and 36min).
The months with the least sunshine are February, March and April (Average sunshine: 6h and 18min).
Average sunshine days in September
Prainha, Brazil
- Average sunshine days in September: 15.8 days
The month with the most sunshine days is August (18.4 days).
The month with the least sunshine days is April (0.8 days).
Average UV index in September
Prainha, Brazil
- Average UV index in September: 8
The month with the highest UV index is September (UV index 8).
The months with the lowest UV index are January, February, March, April and May (UV index 6).
Average cloud cover in September
Prainha, Brazil
- Average cloud cover in September: 23
The month with the most cloud cover is April (Cloud cover 62).
The months with the least cloud cover are August and September (Cloud cover 23).
Average visibility in September
Prainha, Brazil
- Average visibility in September: 10km
The months with the highest visibility are August, September, October and November (10km).
The month with the lowest visibility is April (7km).
