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
In Brasília, temperatures reach their average annual highs in September, measuring 30.4°C (86.7°F) and a minimum average of 18.4°C (65.1°F).Heat index
The heat index value during September is estimated at a tropical 31°C (87.8°F). One might feel worn out with persistent exposure and activity, resulting in heat cramps.Realize that the values for the heat index are set for shaded places and light 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 'apparent temperature' or 'real feel', determines the feeling of heat when you account for the relative humidity. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young ones regularly neglect the requirement for rest and fluid replenishment. Thirst is a late stage of dehydration - so, it is necessary to keep hydrated, particularly during extended periods of physical exertion.
Humidity
September is the least humid month in Brasília, with an average relative humidity of 45%.Rainfall
In Brasília, during September, the rain falls for 7.8 days and regularly aggregates up to 19mm (0.75") of precipitation. Throughout the year, in Brasília, Brazil, there are 191.9 rainfall days, and 1159mm (45.63") of precipitation is accumulated.Daylight
In September, the average length of the day in Brasília is 12h and 1min.On the first day of September in Brasília, Brazil, sunrise is at 06:16 and sunset at 18:05. On the last day of the month, sunrise is at 05:54 and sunset at 18:08 -03.
Sunshine
In Brasília, Brazil, the average sunshine in September is 9.7h.UV index
January, March, August through November, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 6 during September translates into the following directions:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. Stay sun-safe with clothing that is both closely woven and worn loosely.
Frequently asked questions
What month is the hottest in Brasília?
How hot is it in Brasília in September?
What is the least humid month in Brasília?
What is the average humidity in September in Brasília?
How much does it rain in Brasília in September?
How many hours of daylight does Brasília have in September?
When is the sunrise / sunset in September in Brasília?
How long on average sun shines in September in Brasília?
What is the month with the highest UV index in Brasília?
What is the UV index reading in September in Brasília?
Average temperature in September
Brasília, Brazil
- Average high temperature in September: 30.4°C
The warmest month (with the highest average high temperature) is September (30.4°C).
The month with the lowest average high temperature is June (24.6°C).
- Average low temperature in September: 18.4°C
The month with the highest average low temperature is October (19.5°C).
The coldest month (with the lowest average low temperature) is July (14.6°C).
Average pressure in September
Brasília, Brazil
- Average pressure in September: 1014.7mbar
The month with the highest atmospheric pressure is July (1018.3mbar).
The month with the lowest atmospheric pressure is November (1011.6mbar).
Average wind speed in September
Brasília, Brazil
- Average wind speed in September: 9.8km/h
The windiest month (with the highest average wind speed) is August (10.3km/h).
The calmest month (with the lowest average wind speed) is March (7km/h).
Average humidity in September
Brasília, Brazil
- Average humidity in September: 45%
The month with the highest relative humidity is March (87%).
The month with the lowest relative humidity is September (45%).
Average rainfall in September
Brasília, Brazil
- Average rainfall in September: 19mm
The wettest month (with the highest rainfall) is November (254mm).
The driest month (with the least rainfall) is July (1mm).
Average rainfall days in September
Brasília, Brazil
- Average rainfall days in September: 7.8 days
The month with the highest number of rainy days is December (27.5 days).
The month with the least rainy days is July (1.8 days).
Average daylight in September /
Average sunshine in September
Brasília, Brazil
- Average daylight in September: 12h and 0min
The month with the longest days is December (Average daylight: 13h and 6min).
The month with the shortest days is June (Average daylight: 11h and 12min).
- Average sunshine in September: 9h and 4min
The month with the most sunshine is August (Average sunshine: 9h and 54min).
The months with the least sunshine are November and December (Average sunshine: 7h and 30min).
Average sunshine days in September
Brasília, Brazil
- Average sunshine days in September: 21.2 days
The month with the most sunshine days is July (29.2 days).
The month with the least sunshine days is November (2 days).
Average UV index in September
Brasília, Brazil
- Average UV index in September: 6
The months with the highest UV index are January, March, August, September, October and November (UV index 6).
The months with the lowest UV index are February, April, May, June, July and December (UV index 5).
Average cloud cover in September
Brasília, Brazil
- Average cloud cover in September: 15
The month with the most cloud cover is March (Cloud cover 55).
The month with the least cloud cover is August (Cloud cover 12).
Average visibility in September
Brasília, Brazil
- Average visibility in September: 10km
The months with the highest visibility are July, August and September (10km).
The months with the lowest visibility are January, February, March and April (7km).
Brasília, Brazil
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