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
September
Weather in September
Temperature
The advent of September signifies a minor shift to an average high-temperature of a still tropical 33.5°C (92.3°F), aligning closely with August. Cachoeira dos Índios reports a steady low-temperature average of 20.5°C (68.9°F) throughout September, revealing a large deviation from the daytime high.Heat index
The heat index value for September is appraised at a fiery hot 37°C (98.6°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.Factoring in the heat index, values are geared towards shaded areas with light breezes. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young individuals usually face greater risks than adults as their sweat production is less. Also, their larger skin surface relative to their small bodies and the high heat generation due to their activity contributes to their vulnerability.
The innate cooling system of the human body revolves around perspiration, with the evaporation of sweat being central to this process. 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. If heat absorption isn't effectively countered by the body's cooling methods, body temperature surges, hinting at potential problems.
Humidity
The average relative humidity in September is 50%.Rainfall
The month with the least rainfall is September, when the rain falls for 2.9 days and typically collects 2mm (0.08") of precipitation.Daylight
The average length of the day in September is 12h and 4min.On the first day of the month, sunrise is at 05:34 and sunset at 17:34. On the last day of September, sunrise is at 05:19 and sunset at 17:29 -03.
Sunshine
The month with the most sunshine is September, with an average of 9.8h of sunshine.UV index
The months with the highest UV index are March, August through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index, 7 in September, converts into the following recommendations:
Dodge overexposure. Fair-skinned people can get singed in less than 20 minutes. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in September?
What is the average humidity in September?
What is the driest month?
How much does it rain in September?
How many hours of daylight does Cachoeira dos Índios have in September?
When are sunrise and sunset in September?
What month has the most sunshine?
How long on average sun shines in September?
When is the highest UV index?
How high is the UV index in September?
Average temperature in September
Cachoeira dos Índios, Brazil
- Average high temperature in September: 33.5°C
The warmest months (with the highest average high temperature) are October and November (34.3°C).
The month with the lowest average high temperature is June (29.8°C).
- Average low temperature in September: 20.5°C
The months with the highest average low temperature are November and December (22.8°C).
The coldest month (with the lowest average low temperature) is July (18.3°C).
Average pressure in September
Cachoeira dos Índios, Brazil
- Average pressure in September: 1013.9mbar
The month with the highest atmospheric pressure is July (1015.4mbar).
The month with the lowest atmospheric pressure is November (1010.5mbar).
Average wind speed in September
Cachoeira dos Índios, Brazil
- Average wind speed in September: 15.4km/h
The windiest month (with the highest average wind speed) is September (15.4km/h).
The calmest months (with the lowest average wind speed) are March and April (9.3km/h).
Average humidity in September
Cachoeira dos Índios, Brazil
- Average humidity in September: 50%
The month with the highest relative humidity is April (76%).
The months with the lowest relative humidity are October and November (49%).
Average rainfall in September
Cachoeira dos Índios, Brazil
- Average rainfall in September: 2mm
The wettest month (with the highest rainfall) is March (170mm).
The driest month (with the least rainfall) is September (2mm).
Average rainfall days in September
Cachoeira dos Índios, Brazil
- Average rainfall days in September: 2.9 days
The month with the highest number of rainy days is March (24.2 days).
The month with the least rainy days is September (2.9 days).
Average daylight in September /
Average sunshine in September
Cachoeira dos Índios, Brazil
- Average daylight in September: 12h and 1min
The month with the longest days is December (Average daylight: 12h and 30min).
The month with the shortest days is June (Average daylight: 11h and 42min).
- Average sunshine in September: 9h and 5min
The month with the most sunshine is September (Average sunshine: 9h and 48min).
The month with the least sunshine is March (Average sunshine: 7h and 30min).
Average sunshine days in September
Cachoeira dos Índios, Brazil
- Average sunshine days in September: 26 days
The month with the most sunshine days is September (26 days).
The month with the least sunshine days is March (5.2 days).
Average UV index in September
Cachoeira dos Índios, Brazil
- Average UV index in September: 7
The months with the highest UV index are March, August, September, October, November and December (UV index 7).
The months with the lowest UV index are January, February, April, May, June and July (UV index 6).
Average cloud cover in September
Cachoeira dos Índios, Brazil
- Average cloud cover in September: 19
The month with the most cloud cover is April (Cloud cover 49).
The month with the least cloud cover is September (Cloud cover 19).
Average visibility in September
Cachoeira dos Índios, Brazil
- Average visibility in September: 10km
The months with the highest visibility are June, July, August, September, October, November and December (10km).
The month with the lowest visibility is April (8km).
