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The weather in Brasilia in September is hot. The average temperatures are between 19°C and 31°C. Usually the days in September are hot while the nights are a bit cooler.
You can expect a few rainy days in Brasilia during September, but usually the weather is comfortable in September.
Our weather forecast can give you a great sense of what weather to expect in Brasilia in September 2025.
If you’re planning to visit Brasilia in the near future, we highly recommend that you review the 14 day weather forecast for Brasilia before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 26° / 18° | 17 | 14 | 0 | 360 mm | Good | Brasilia in January |
| February | 26° / 18° | 16 | 12 | 0 | 289 mm | Good | Brasilia in February |
| March | 26° / 18° | 17 | 14 | 0 | 285 mm | Good | Brasilia in March |
| April | 26° / 18° | 11 | 19 | 0 | 185 mm | Good | Brasilia in April |
| May | 25° / 16° | 3 | 28 | 0 | 64 mm | Perfect | Brasilia in May |
| June | 25° / 16° | 0 | 30 | 0 | 18 mm | Perfect | Brasilia in June |
| July | 26° / 15° | 0 | 31 | 0 | 4 mm | Perfect | Brasilia in July |
| August | 29° / 17° | 0 | 31 | 0 | 6 mm | Good | Brasilia in August |
| September | 31° / 19° | 2 | 28 | 0 | 49 mm | Good | Brasilia in September |
| October | 30° / 20° | 11 | 20 | 0 | 329 mm | Ok | Brasilia in October |
| November | 26° / 19° | 19 | 11 | 0 | 506 mm | Good | Brasilia in November |
| December | 26° / 19° | 20 | 11 | 0 | 401 mm | Good | Brasilia in December |