Climate averages 1991–2020
São Sebastião (Federal District), Brazil weather
in September.
A hot, fairly dry month: the warmest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in São Sebastião (Federal District), Brazil: daytime highs average 29.2°C and nights cool to about 17.6°C. By daytime temperature it is the warmest month of the year.
Expect about 28 mm of rain on roughly 5 days, which makes September a fairly dry month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 00 min on an average September day.
The nearest other city in this atlas is Brasília (21 km away). In September its highs average 29.0°C, about as warm as São Sebastião (Federal District), Brazil, with 34 mm of rain.
Among the 448 cities listed in Brazil, São Sebastião (Federal District), Brazil ranks joint 147th of 448 for the warmest September highs and joint 83rd of 448 for the driest September (rainfall, lowest first). The mean September high of those 448 cities is 27.5°C; São Sebastião (Federal District), Brazil is 1.6°C warmer than that mean.
From September to October, average highs fall by 0.2°C to 28.9°C, and monthly rainfall rises from 28 mm to 104 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
São Sebastião (Federal District), Brazil climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 26.3°C18.5°C | 18.5°C | 203 | 21.0 | 13.013 h |
| February | 26.5°C18.5°C | 18.5°C | 162 | 18.4 | 12.613 h |
| March | 26.3°C18.4°C | 18.4°C | 180 | 20.0 | 12.212 h |
| April | 26.0°C17.6°C | 17.6°C | 71 | 11.3 | 11.712 h |
| May | 25.5°C15.8°C | 15.8°C | 17 | 3.2 | 11.411 h |
| June | 24.9°C14.3°C | 14.3°C | 4.2 | 0.6 | 11.211 h |
| July | 25.1°C13.8°C | 13.8°C | 0.3 | 0.0 | 11.311 h |
| August | 27.0°C15.1°C | 15.1°C | 4.9 | 1.2 | 11.612 h |
| September, selected | 29.2°C17.6°C | 17.6°C | 28 | 4.8 | 12.012 h |
| October | 28.9°C18.7°C | 18.7°C | 104 | 13.2 | 12.412 h |
| November | 26.5°C18.4°C | 18.4°C | 201 | 21.1 | 12.813 h |
| December | 26.3°C18.5°C | 18.5°C | 225 | 23.1 | 13.113 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Brasília in SeptemberBrazil · 21 kmHigh 29.0°C · Low 17.9°C · 34 mm rain
- Águas Claras in SeptemberBrazil · 28 kmHigh 28.8°C · Low 18.0°C · 34 mm rain
- Valparaíso de Goiás in SeptemberBrazil · 28 kmHigh 29.4°C · Low 17.9°C · 35 mm rain
- Cidade Ocidental in SeptemberBrazil · 28 kmHigh 30.2°C · Low 18.5°C · 35 mm rain
- Riacho Fundo II in SeptemberBrazil · 29 kmHigh 28.6°C · Low 17.4°C · 35 mm rain
- Santa Maria, Brazil in SeptemberBrazil · 31 kmHigh 28.7°C · Low 17.7°C · 35 mm rain
- Sobradinho II in SeptemberBrazil · 31 kmHigh 29.4°C · Low 18.2°C · 28 mm rain
- Gama in SeptemberBrazil · 34 kmHigh 29.5°C · Low 18.1°C · 35 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for São Sebastião) is explained once on the São Sebastião (Federal District), Brazil year overview and on the Sources, method and limits page.