Brasília weather in September
September in Brasília: hot, dry, with clean air — an excellent time to visit.
#5 of 12 months in Brasília · #109 of 604 destinations to visit in September · comfort 88/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Brasília climate normals — September
| Daytime high | 30°C / 87°F | 🥵 hot |
|---|---|---|
| Nighttime low | 19°C / 65°F | |
| Feels like (high) | 30°C / 86°F | |
| Rainfall | 11 mm / 0.4 in | ☀️ dry |
| Rainy days | 3 days | |
| Humidity | 48% | 🍃 comfortable |
| Dew point | 11°C / 52°F | |
| Sunshine | 10.9 h/day | |
| Daylight | 12 h | |
| Wind | 15 km/h / 9 mph | |
| Air quality (US AQI) | 43 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Brasília in September — FAQ
- Is September a good time to visit Brasília?
- September in Brasília: hot, dry, with clean air — an excellent time to visit. It ranks #5 of 12 months for Brasília on SeasonMap's comfort score (88/100).
- What is the weather like in Brasília in September?
- In September, Brasília averages a daily high of 30.3°C and a low of 18.6°C, with about 11.3 mm of rain over roughly 3 rainy days.
- What is the air quality in Brasília in September?
- Brasília has a mean US Air Quality Index of about 43 in September.