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
Fernão Velho's weather in September displays an average high-temperature of a still warm 27.1°C (80.8°F), showing minor disparity from August's 26.3°C (79.3°F). During the month of September, the temperature generally drops to a low average of 21.1°C (70°F).Heat index
The heat index value for September is calculated to be a tropical 30°C (86°F). Prolonged exposure and physical activity might induce exhaustion, potentially causing heat cramps.Know that the heat index computations account for shaded terrains and slight winds. 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 'felt air temperature' or 'real feel', marries air temperature and humidity to produce a value illustrating perceived warmth. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
Humidity
The average relative humidity in September in Fernão Velho, Brazil, is 81%.Rainfall
In September, in Fernão Velho, the rain falls for 21.8 days. Throughout September, 37mm (1.46") of precipitation is accumulated. Throughout the year, there are 256.6 rainfall days, and 686mm (27.01") of precipitation is accumulated.Daylight
In September, the average length of the day is 12h and 4min.On the first day of September, sunrise is at 05:24 and sunset at 17:21. On the last day of the month, sunrise is at 05:07 and sunset at 17:18 -03.
Sunshine
In Fernão Velho, the average sunshine in September is 7.3h.UV index
The months with the lowest UV index in Fernão Velho are April through September, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum UV index of 6 during September leads to these instructions:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Frequently asked questions
What is the temperature in September in Fernão Velho?
What is the average humidity in September in Fernão Velho?
How much does it rain in Fernão Velho in September?
How many hours of daylight does Fernão Velho have in September?
When is the sunrise / sunset in September in Fernão Velho?
How long on average sun shines in September in Fernão Velho?
What are the months with the lowest UV index in Fernão Velho?
What is the UV index intensity in September in Fernão Velho?
Average temperature in September
Fernão Velho, Brazil
- Average high temperature in September: 27.1°C
The warmest month (with the highest average high temperature) is March (31.3°C).
The months with the lowest average high temperature are July and August (26.3°C).
- Average low temperature in September: 21.1°C
The month with the highest average low temperature is March (24°C).
The coldest month (with the lowest average low temperature) is August (20.8°C).
Average pressure in September
Fernão Velho, Brazil
- Average pressure in September: 1016.4mbar
The month with the highest atmospheric pressure is August (1017.2mbar).
The month with the lowest atmospheric pressure is March (1012.2mbar).
Average wind speed in September
Fernão Velho, Brazil
- Average wind speed in September: 12.1km/h
The windiest month (with the highest average wind speed) is November (13.4km/h).
The calmest month (with the lowest average wind speed) is May (8.9km/h).
Average humidity in September
Fernão Velho, Brazil
- Average humidity in September: 81%
The months with the highest relative humidity are June and July (84%).
The months with the lowest relative humidity are March and December (74%).
Average rainfall in September
Fernão Velho, Brazil
- Average rainfall in September: 37mm
The wettest month (with the highest rainfall) is July (105mm).
The driest month (with the least rainfall) is November (21mm).
Average rainfall days in September
Fernão Velho, Brazil
- Average rainfall days in September: 21.8 days
The month with the highest number of rainy days is July (26.5 days).
The month with the least rainy days is November (15.3 days).
Average daylight in September /
Average sunshine in September
Fernão Velho, Brazil
- Average daylight in September: 12h and 1min
The month with the longest days is December (Average daylight: 12h and 42min).
The month with the shortest days is June (Average daylight: 11h and 36min).
- Average sunshine in September: 7h and 2min
The month with the most sunshine is March (Average sunshine: 8h and 6min).
The month with the least sunshine is July (Average sunshine: 6h and 54min).
Average sunshine days in September
Fernão Velho, Brazil
- Average sunshine days in September: 5.1 days
The month with the most sunshine days is December (7 days).
The month with the least sunshine days is June (2.3 days).
Average UV index in September
Fernão Velho, Brazil
- Average UV index in September: 6
The months with the highest UV index are January, February, March, October, November and December (UV index 7).
The months with the lowest UV index are April, May, June, July, August and September (UV index 6).
Average cloud cover in September
Fernão Velho, Brazil
- Average cloud cover in September: 47
The month with the most cloud cover is July (Cloud cover 52).
The month with the least cloud cover is March (Cloud cover 39).
Average visibility in September
Fernão Velho, Brazil
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, June, August, September, October, November and December (10km).
The months with the lowest visibility are May and July (9km).
Fernão Velho, Brazil
Weather forecast for your location
2. Allow the app to use your location
