Climate averages 1991–2020
Formosa, 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 Formosa, Brazil: daytime highs average 30.3°C and nights cool to about 19.2°C. By daytime temperature it is the warmest month of the year.
Expect about 23 mm of rain on roughly 4 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 Planaltina (Goias), Brazil (31 km away). In September its highs average 29.5°C, 0.8°C cooler than Formosa, Brazil, with 29 mm of rain.
Among the 448 cities listed in Brazil, Formosa, Brazil ranks joint 119th of 448 for the warmest September highs and 69th of 448 for the driest September (rainfall, lowest first). The mean September high of those 448 cities is 27.5°C; Formosa, Brazil is 2.8°C warmer than that mean.
From September to October, average highs fall by 0.2°C to 30.1°C, and monthly rainfall rises from 23 mm to 103 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
Formosa, Brazil climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 27.3°C19.5°C | 19.5°C | 202 | 18.7 | 12.913 h |
| February | 27.5°C19.3°C | 19.3°C | 161 | 16.8 | 12.613 h |
| March | 27.2°C19.2°C | 19.2°C | 173 | 18.3 | 12.212 h |
| April | 27.1°C18.8°C | 18.8°C | 69 | 9.9 | 11.812 h |
| May | 26.7°C17.4°C | 17.4°C | 14 | 3.0 | 11.411 h |
| June | 26.1°C16.1°C | 16.1°C | 3.6 | 0.6 | 11.211 h |
| July | 26.3°C15.7°C | 15.7°C | 0.3 | 0.0 | 11.311 h |
| August | 28.1°C16.9°C | 16.9°C | 4.3 | 1.1 | 11.612 h |
| September, selected | 30.3°C19.2°C | 19.2°C | 23 | 3.8 | 12.012 h |
| October | 30.1°C20.2°C | 20.2°C | 103 | 11.5 | 12.412 h |
| November | 27.4°C19.4°C | 19.4°C | 218 | 20.6 | 12.813 h |
| December | 27.2°C19.5°C | 19.5°C | 245 | 20.5 | 13.013 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
- Planaltina (Goias), Brazil in SeptemberBrazil · 31 kmHigh 29.5°C · Low 18.5°C · 29 mm rain
- Planaltina (Federal District), Brazil in SeptemberBrazil · 35 kmHigh 29.8°C · Low 19.0°C · 25 mm rain
- Sobradinho II in SeptemberBrazil · 55 kmHigh 29.4°C · Low 18.2°C · 28 mm rain
- São Sebastião (Federal District), Brazil in SeptemberBrazil · 62 kmHigh 29.2°C · Low 17.6°C · 28 mm rain
- Brasília in SeptemberBrazil · 69 kmHigh 29.0°C · Low 17.9°C · 34 mm rain
- Águas Claras in SeptemberBrazil · 81 kmHigh 28.8°C · Low 18.0°C · 34 mm rain
- Riacho Fundo II in SeptemberBrazil · 86 kmHigh 28.6°C · Low 17.4°C · 35 mm rain
- Cidade Ocidental in SeptemberBrazil · 90 kmHigh 30.2°C · Low 18.5°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 Formosa) is explained once on the Formosa, Brazil year overview and on the Sources, method and limits page.