Climate averages 1991–2020
Palmas weather
in September.
A very hot, fairly dry month: the warmest and the 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a very hot month in Palmas: daytime highs average 35.4°C and nights cool to about 24.1°C. By daytime temperature it is the warmest month of the year.
Expect about 25 mm of rain on roughly 4 days, which makes September a fairly dry month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 02 min on an average September day.
The nearest other city in this atlas is Gurupi (192 km away). In September its highs average 35.3°C, about as warm as Palmas, with 18 mm of rain.
Among the 448 cities listed in Brazil, Palmas ranks 5th of 448 for the warmest September highs and joint 73rd of 448 for the driest September (rainfall, lowest first). The mean September high of those 448 cities is 27.5°C; Palmas is 7.8°C warmer than that mean.
From September to October, average highs fall by 2.0°C to 33.3°C, and monthly rainfall rises from 25 mm to 129 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
Palmas climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.8°C22.7°C | 22.7°C | 354 | 27.1 | 12.613 h |
| February | 29.9°C22.7°C | 22.7°C | 318 | 25.2 | 12.412 h |
| March | 29.9°C22.7°C | 22.7°C | 313 | 26.7 | 12.212 h |
| April | 30.4°C22.7°C | 22.7°C | 192 | 18.8 | 11.912 h |
| May | 31.6°C22.7°C | 22.7°C | 55 | 7.1 | 11.712 h |
| June | 32.4°C21.6°C | 21.6°C | 2.5 | 0.4 | 11.512 h |
| July | 32.8°C21.1°C | 21.1°C | 0.5 | 0.1 | 11.612 h |
| August | 34.4°C22.2°C | 22.2°C | 0.9 | 0.3 | 11.812 h |
| September, selected | 35.4°C24.1°C | 24.1°C | 25 | 3.5 | 12.012 h |
| October | 33.3°C24.0°C | 24.0°C | 129 | 15.5 | 12.312 h |
| November | 30.9°C23.2°C | 23.2°C | 248 | 21.6 | 12.613 h |
| December | 30.4°C23.0°C | 23.0°C | 297 | 25.0 | 12.713 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
- Gurupi in SeptemberBrazil · 192 kmHigh 35.3°C · Low 25.0°C · 18 mm rain
- Redenção in SeptemberBrazil · 303 kmHigh 34.2°C · Low 23.2°C · 38 mm rain
- Araguaína in SeptemberBrazil · 331 kmHigh 34.2°C · Low 22.6°C · 25 mm rain
- Luis Eduardo Magalhães in SeptemberBrazil · 350 kmHigh 31.5°C · Low 19.6°C · 12 mm rain
- Balsas in SeptemberBrazil · 386 kmHigh 35.1°C · Low 24.1°C · 8.6 mm rain
- Barreiras in SeptemberBrazil · 426 kmHigh 33.8°C · Low 21.6°C · 8.2 mm rain
- Parauapebas in SeptemberBrazil · 488 kmHigh 33.0°C · Low 23.6°C · 25 mm rain
- Imperatriz in SeptemberBrazil · 524 kmHigh 34.5°C · Low 24.5°C · 9.6 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 Palmas) is explained once on the Palmas year overview and on the Sources, method and limits page.