Brasília weather in September
In September, Brasília has an average high of 31 °C88 °F and an average low of 16 °C62 °F, with about 32 mm1.2 in of precipitation. It is the 2nd warmest month of the year and ranks 8th for precipitation.
How September compares with other months
Compared with August, September is 2.6 °C4.6 °F warmer on average and wetter by 20 mm0.8 in. Compared with October, September is about the same temperature and drier by 82 mm3.2 in. Daylight lasts about 12.0 hours around the middle of the month. Average relative humidity is 43% and the average cloud amount 37%.
Is September a good time to visit Brasília?
September is not among the most comfortable months by our comfort score: it is hot (average high 31 °C88 °F). The most comfortable months in Brasília are May–August.
What to wear in September
For Brasília in September, pack very light, breathable clothing, a sun hat and plenty of water and an extra layer for the cooler mornings and evenings.
September in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Brasília | 3188 | 1662 | 321.2 |
| Ceilândia | 3188 | 1661 | 321.2 |
| Gama | 3289 | 1762 | 321.2 |
| Valparaíso de Goiás | 3289 | 1762 | 321.2 |
| Planaltina | 3188 | 1661 | 251.0 |
| Luziânia | 3391 | 1864 | 331.3 |
| Anápolis | 3289 | 1763 | 431.7 |
| Goiânia | 3493 | 1967 | 431.7 |
| Aparecida de Goiânia | 3492 | 1865 | 451.8 |
Nearby places that are more than 1 °C1.8 °F warmer in September: Luziânia, Goiânia and Aparecida de Goiânia.
Other months in Brasília
- January26 °C78 °F / 17 °C63 °F
- February26 °C78 °F / 17 °C63 °F
- March25 °C78 °F / 17 °C62 °F
- April25 °C77 °F / 16 °C60 °F
- May25 °C77 °F / 13 °C56 °F
- June26 °C78 °F / 12 °C53 °F
- July27 °C80 °F / 12 °C53 °F
- August29 °C84 °F / 14 °C56 °F
- September31 °C88 °F / 16 °C62 °F
- October30 °C87 °F / 18 °C64 °F
- November27 °C81 °F / 17 °C63 °F
- December26 °C79 °F / 17 °C63 °F
Frequently asked questions
How warm is Brasília in September?
In September the average high in Brasília is 31 °C (88 °F) and the average low is 16 °C (62 °F).
Does it rain a lot in Brasília in September?
On average about 32 mm (1.2 in) of precipitation falls in September; it ranks 8th of the 12 months.
Is September the warmest month in Brasília?
Yes. September is the warmest month in Brasília. The coldest month is July, with an average low of 12 °C (53 °F).
How long is the day in Brasília in September?
In the middle of September the day in Brasília lasts about 12.0 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Brasília in September?
The average relative humidity in September is about 43%. This is a long-term average for the whole day.
How cloudy is Brasília in September?
On average about 37% of the sky is covered by cloud in September. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 985 m, while Brasília lies at about 1,136 m. Temperatures on this page were therefore adjusted by −1 °C1.8 °F using the standard lapse rate of 6.5 °C per 1,000 m.