Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
Upon the onset of September, Açu witnesses an average high-temperature of a still tropical 34.7°C (94.5°F), showing a close resemblance to the prior month. Throughout September, Açu notes a dramatic plunge from the daily high to an average low-temperature of 22.2°C (72°F).Heat index
For September, the heat index is appraised at a blisteringly hot 42°C (107.6°F). Implement more safety precautions, heat cramps and heat exhaustion may happen. Persistent activity could induce heatstroke.Understanding the heat index involves considering values for shaded locales with light wind. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'feels like', integrates the air's temperature and its humidity to showcase the felt temperature by people. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are highly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.
One way the human body deals with excessive warmth is by perspiring and allowing sweat to evaporate. 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. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.
Humidity
The months with the lowest humidity in Açu are September and October, with an average relative humidity of 55%.Rainfall
In September, in Açu, the rain falls for 2.4 days. Throughout September, 3mm (0.12") of precipitation is accumulated. In Açu, during the entire year, the rain falls for 112.4 days and collects up to 381mm (15") of precipitation.Daylight
In Açu, the average length of the day in September is 12h and 5min.On the first day of September in Açu, sunrise is at 05:27 and sunset at 17:27. On the last day of the month, sunrise is at 05:12 and sunset at 17:22 -03.
Sunshine
The month with the most sunshine in Açu is September, with an average of 9.6h of sunshine.UV index
January through December, with an average maximum UV index of 7, are months with the highest UV index. The months with the lowest UV index are January through December, 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 radiation for the ordinary person.Note: An average UV index of 7 in September transforms into this advice:
Embrace precautions and observe sun safety norms. Evasion of sunburn is a necessity. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Frequently asked questions
How hot does it get in Açu in September?
What are the least humid months in Açu?
What is the average humidity in September in Açu?
How many days does it rain in September in Açu?
What is the average length of the day in September in Açu?
What time are sunrise and sunset in September in Açu?
What month has the most sunshine in Açu?
How many hours of sunshine does Açu have in September?
What are the months with the highest UV index in Açu?
When is the lowest UV index in Açu?
How high is the UV index in September in Açu?
Average temperature in September
Açu, Brazil
- Average high temperature in September: 34.7°C
The warmest month (with the highest average high temperature) is October (35.7°C).
The month with the lowest average high temperature is July (32°C).
- Average low temperature in September: 22.2°C
The month with the highest average low temperature is January (24.6°C).
The coldest months (with the lowest average low temperature) are July and August (21.7°C).
Average pressure in September
Açu, Brazil
- Average pressure in September: 1013.7mbar
The month with the highest atmospheric pressure is July (1014.6mbar).
The month with the lowest atmospheric pressure is November (1010.7mbar).
Average wind speed in September
Açu, Brazil
- Average wind speed in September: 20.5km/h
The windiest months (with the highest average wind speed) are September and October (20.5km/h).
The calmest month (with the lowest average wind speed) is April (12.3km/h).
Average humidity in September
Açu, Brazil
- Average humidity in September: 55%
The month with the highest relative humidity is April (73%).
The months with the lowest relative humidity are September and October (55%).
Average rainfall in September
Açu, Brazil
- Average rainfall in September: 3mm
The wettest month (with the highest rainfall) is March (92mm).
The driest months (with the least rainfall) are October and November (1mm).
Average rainfall days in September
Açu, Brazil
- Average rainfall days in September: 2.4 days
The month with the highest number of rainy days is April (17.2 days).
The month with the least rainy days is November (1.4 days).
Average daylight in September /
Average sunshine in September
Açu, Brazil
- Average daylight in September: 12h and 1min
The month with the longest days is December (Average daylight: 12h and 24min).
The month with the shortest days is June (Average daylight: 11h and 48min).
- Average sunshine in September: 9h and 4min
The month with the most sunshine is September (Average sunshine: 9h and 36min).
The month with the least sunshine is March (Average sunshine: 8h and 18min).
Average sunshine days in September
Açu, Brazil
- Average sunshine days in September: 27.2 days
The month with the most sunshine days is October (28.5 days).
The month with the least sunshine days is April (11.8 days).
Average UV index in September
Açu, Brazil
- Average UV index in September: 7
The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
Average cloud cover in September
Açu, Brazil
- Average cloud cover in September: 16
The month with the most cloud cover is March (Cloud cover 38).
The month with the least cloud cover is September (Cloud cover 16).
Average visibility in September
Açu, Brazil
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
Açu, Brazil
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