Climate averages 1991–2020
Goiânia 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 Goiânia: daytime highs average 31.9°C and nights cool to about 20.3°C. By daytime temperature it is the warmest month of the year.
Expect about 30 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 11 h 59 min on an average September day.
The nearest other city in this atlas is Aparecida de Goiânia (16 km away). In September its highs average 31.4°C, about as warm as Goiânia, with 30 mm of rain.
Among the 448 cities listed in Brazil, Goiânia ranks joint 72nd of 448 for the warmest September highs and joint 95th of 448 for the driest September (rainfall, lowest first). The mean September high of those 448 cities is 27.5°C; Goiânia is 4.3°C warmer than that mean.
From September to October, average highs fall by 0.8°C to 31.1°C, and monthly rainfall rises from 30 mm to 102 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
Goiânia climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 27.7°C20.0°C | 20.0°C | 224 | 22.7 | 13.013 h |
| February | 28.0°C19.8°C | 19.8°C | 175 | 20.3 | 12.613 h |
| March | 27.8°C19.7°C | 19.7°C | 178 | 21.0 | 12.212 h |
| April | 28.0°C18.9°C | 18.9°C | 76 | 12.0 | 11.712 h |
| May | 27.7°C17.2°C | 17.2°C | 14 | 2.8 | 11.311 h |
| June | 27.5°C16.4°C | 16.4°C | 4.7 | 0.9 | 11.211 h |
| July | 27.8°C16.2°C | 16.2°C | 0.9 | 0.3 | 11.211 h |
| August | 30.0°C17.9°C | 17.9°C | 6.0 | 1.0 | 11.612 h |
| September, selected | 31.9°C20.3°C | 20.3°C | 30 | 5.0 | 12.012 h |
| October | 31.1°C20.8°C | 20.8°C | 102 | 14.8 | 12.512 h |
| November | 28.4°C20.0°C | 20.0°C | 196 | 22.3 | 12.913 h |
| December | 27.8°C20.0°C | 20.0°C | 218 | 24.1 | 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
- Aparecida de Goiânia in SeptemberBrazil · 16 kmHigh 31.4°C · Low 19.9°C · 30 mm rain
- Senador Canedo in SeptemberBrazil · 17 kmHigh 31.3°C · Low 20.2°C · 29 mm rain
- Trindade in SeptemberBrazil · 25 kmHigh 31.7°C · Low 20.5°C · 30 mm rain
- Anápolis in SeptemberBrazil · 51 kmHigh 30.2°C · Low 19.3°C · 34 mm rain
- Santo Antônio do Descoberto in SeptemberBrazil · 135 kmHigh 30.7°C · Low 19.4°C · 32 mm rain
- Caldas Novas in SeptemberBrazil · 136 kmHigh 31.6°C · Low 19.8°C · 34 mm rain
- Águas Lindas de Goiás in SeptemberBrazil · 145 kmHigh 29.8°C · Low 18.4°C · 30 mm rain
- Gama in SeptemberBrazil · 146 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 Goiânia) is explained once on the Goiânia year overview and on the Sources, method and limits page.
Aparecida de Goiânia lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.