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
Alto do Velame marks the arrival of September with an average high-temperature of a very hot 35°C (95°F), hardly different from August's 34.4°C (93.9°F). A considerable shift from the daytime highs is observed in Alto do Velame during September nights, with an average low of 22.5°C (72.5°F).Heat index
The heat index for September is computed to be a blisteringly hot 44°C (111.2°F). Mindful: Heat cramps and heat exhaustion are to be expected. Extended physical effort might result in heatstroke.For clarity, heat index numbers account for light winds and areas under shade. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', evaluates the perceived heat by adding the effect of moisture in the air. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are of high significance for children. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.
Humidity
September is the least humid month, with an average relative humidity of 58%.Rainfall
September through November are months with the least rain in Alto do Velame when the rain falls for 1.5 days and typically aggregates up to 1mm (0.04") of rain.Daylight
The average length of the day in September is 12h and 5min.On the first day of September, sunrise is at 05:31 and sunset at 17:32. On the last day of the month, sunrise is at 05:17 and sunset at 17:26 -03.
Sunshine
September has the most sunshine of the year, with an average of 9.6h of sunshine.UV index
The months with the highest UV index in Alto do Velame are January through December, with an average maximum UV index of 7. January through December, with an average maximum UV index of 7, are months with the lowest UV index in Alto do Velame. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: A daily maximum UV index of 7 in September translates into the following instructions:
Use protective steps and abide by sun safety guidelines. Safeguarding against skin and eye harm is necessary. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in Alto do Velame in September?
What is the least humid month in Alto do Velame?
What is the average humidity in September in Alto do Velame?
What is the driest month in Alto do Velame?
How many days does it rain in September in Alto do Velame?
What is the average length of the day in September in Alto do Velame?
When is the sunrise / sunset in September in Alto do Velame?
What month has the most sunshine in Alto do Velame?
How many hours of sunshine does Alto do Velame have in September?
When is the highest UV index in Alto do Velame?
What is the month with the lowest UV index in Alto do Velame?
How high is the UV index in September in Alto do Velame?
Average temperature in September
Alto do Velame, Brazil
- Average high temperature in September: 35°C
The warmest month (with the highest average high temperature) is October (35.3°C).
The month with the lowest average high temperature is July (31.8°C).
- Average low temperature in September: 22.5°C
The month with the highest average low temperature is December (24.5°C).
The coldest month (with the lowest average low temperature) is July (21.6°C).
Average pressure in September
Alto do Velame, Brazil
- Average pressure in September: 1013.2mbar
The month with the highest atmospheric pressure is July (1014.2mbar).
The month with the lowest atmospheric pressure is November (1010.4mbar).
Average wind speed in September
Alto do Velame, Brazil
- Average wind speed in September: 18.4km/h
The windiest month (with the highest average wind speed) is October (18.8km/h).
The calmest month (with the lowest average wind speed) is April (11.7km/h).
Average humidity in September
Alto do Velame, Brazil
- Average humidity in September: 58%
The month with the highest relative humidity is April (77%).
The month with the lowest relative humidity is September (58%).
Average rainfall in September
Alto do Velame, Brazil
- Average rainfall in September: 1mm
The wettest month (with the highest rainfall) is March (81mm).
The driest months (with the least rainfall) are September, October and November (1mm).
Average rainfall days in September
Alto do Velame, Brazil
- Average rainfall days in September: 1.5 days
The month with the highest number of rainy days is March (18.6 days).
The month with the least rainy days is September (1.5 days).
Average daylight in September /
Average sunshine in September
Alto do Velame, 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: 7h and 30min).
Average sunshine days in September
Alto do Velame, Brazil
- Average sunshine days in September: 28.4 days
The month with the most sunshine days is September (28.4 days).
The month with the least sunshine days is April (10.1 days).
Average UV index in September
Alto do Velame, 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
Alto do Velame, Brazil
- Average cloud cover in September: 17
The month with the most cloud cover is March (Cloud cover 43).
The month with the least cloud cover is September (Cloud cover 17).
Average visibility in September
Alto do Velame, Brazil
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are April and May (9km).
