Brasília
Brazil
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Brasília, Brazil

A road network in Brasília, Brazil, with an extension of the entire city layout
A road network in Brasília, Brazil, with an extension of the entire city layout
September, the first month of the spring, in Brasília, is also a moderately hot month, with temperature in the range of an average low of 16°C (60.8°F) and an average high of 28.3°C (82.9°F).

Temperature

September is the warmest month, with an average high-temperature of 28.3°C (82.9°F) and an average low-temperature of 16°C (60.8°F).

Heat index

In September, the average heat index is calculated to 29.1°C (84.4°F). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'real feel', 'apparent temperature', or 'feels like', is a measure that combines both air temperature and relative humidity into a single value that indicates how hot the weather feels.

Humidity

In September, the average relative humidity is 53%.

Rainfall

In Brasília, it is raining for 5 days, with typically 55.2mm (2.2") of accumulated precipitation. In Brasília, during the entire year, the rain falls for 111 days and collects up to 1540.5mm (60.6") of precipitation.

Daylight

The average length of the day is 12h.

Sunshine

The average sunshine is 6.8h.

UV index

Months with the highest UV index are January through March, September through December, with an average maximum UV index of 12. A UV Index estimate of 11, and higher, represents an excessive health risk from the exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 12 in September interpret into the following advice:
Take all necessary precautions, as unprotected skin can burn in minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Prolonged stay under the direct sun should be avoided as much as possible, especially if a person burns easily. Sunscreen with a minimum 30 sun protection factor should always be used.

What is the warmest month in Brasília?

With an average high-temperature of 28.3°C (82.9°F) and an average low-temperature of 16°C (60.8°F), September is the warmest month in Brasília, Brazil.

What is the temperature in September in Brasília?

In September, in Brasília, Brazil, the average high-temperature is 28.3°C (82.9°F), and the average low-temperature is 16°C (60.8°F).

What is the average humidity in September in Brasília?

The average relative humidity in September in Brasília, Brazil, is 53%.

How many days does it rain in September in Brasília?

In Brasília, in September, it is raining for 5 days, with typically 55.2mm (2.2") of accumulated precipitation.

How many hours of daylight does Brasília have in September?

In September, the average length of the day is 12h.

How long on average sun shines in September in Brasília?

In September, the average sunshine is 6.8h.

When is the highest UV index in Brasília?

Months with the highest UV index in Brasília are January through March, September through December, with an average maximum UV index of 12.

How high is the UV index in September in Brasília?

In September, the average daily maximum UV index in Brasília is 12. A UV Index of 11, and more, symbolizes an excessive health risk from unsafe exposure to the Sun's UV rays.
Average temperature in September - Brasília, Brazil
  • Average high temperature in September: 28.3°C

The warmest month (with the highest average high temperature) is September (28.3°C).
The month with the lowest average high temperature is July (25.1°C).

  • Average low temperature in September: 16°C

Months with the highest average low temperature are March, November and December (17.5°C).
The coldest month (with the lowest average low temperature) is July (12.9°C).

Average humidity in September - Brasília, Brazil
  • Average humidity in September: 53%

The month with the highest relative humidity is December (79%).
The month with the lowest relative humidity is August (49%).

Average rainfall in September - Brasília, Brazil
  • Average rainfall in September: 55.2mm

The wettest month (with the highest rainfall) is January (247.4mm).
The driest month (with the lowest rainfall) is June (8.7mm).

Average rainfall days in September - Brasília, Brazil
  • Average rainfall days in September: 5 days

The month with the highest number of rainy days is December (18 days).
Months with the lowest number of rainy days are June, July and August (1 days).

Average daylight in September / Average sunshine in September - Brasília, Brazil
  • Average daylight in September: 12h

The month with the longest days is December (Average daylight: 13.1h).
The month with shortest days is June (Average daylight: 11.2h).

  • Average sunshine in September: 6.8h

The month with most sunshine is July (Average sunshine: 8.6h).
The month with least sunshine is December (Average sunshine: 4.5h).

Average UV index in September - Brasília, Brazil
  • Average UV index in September: 12

Months with the highest UV index are January, February, March, September, October, November and December (UV index 12).
Months with the lowest UV index are June and July (UV index 8).