Climate averages 1991–2020
Açailândia weather
in September.
A hot, very dry month: the warmest and the 3rd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Açailândia: daytime highs average 33.6°C and nights cool to about 22.9°C. By daytime temperature it is the warmest month of the year.
Expect about 14 mm of rain on roughly 3 days, which makes September a very dry month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 05 min on an average September day.
The nearest other city in this atlas is Imperatriz (64 km away). In September its highs average 34.5°C, 1.0°C warmer than Açailândia, with 9.6 mm of rain.
Among the 448 cities listed in Brazil, Açailândia ranks joint 35th of 448 for the warmest September highs and joint 56th of 448 for the driest September (rainfall, lowest first). The mean September high of those 448 cities is 27.5°C; Açailândia is 6.0°C warmer than that mean.
From September to October, average highs fall by 0.5°C to 33.0°C, and monthly rainfall rises from 14 mm to 41 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
Açailândia climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.5°C22.0°C | 22.0°C | 255 | 27.4 | 12.412 h |
| February | 28.3°C21.9°C | 21.9°C | 262 | 25.4 | 12.312 h |
| March | 28.2°C22.0°C | 22.0°C | 300 | 28.8 | 12.112 h |
| April | 28.4°C22.0°C | 22.0°C | 210 | 24.6 | 12.012 h |
| May | 29.1°C21.9°C | 21.9°C | 102 | 14.9 | 11.912 h |
| June | 30.6°C21.6°C | 21.6°C | 15 | 3.3 | 11.812 h |
| July | 31.9°C21.6°C | 21.6°C | 8.6 | 1.7 | 11.912 h |
| August | 33.2°C22.1°C | 22.1°C | 3.5 | 0.7 | 12.012 h |
| September, selected | 33.6°C22.9°C | 22.9°C | 14 | 2.8 | 12.112 h |
| October | 33.0°C23.4°C | 23.4°C | 41 | 7.1 | 12.212 h |
| November | 31.5°C23.1°C | 23.1°C | 101 | 14.5 | 12.312 h |
| December | 30.0°C22.6°C | 22.6°C | 165 | 21.4 | 12.412 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
- Imperatriz in SeptemberBrazil · 64 kmHigh 34.5°C · Low 24.5°C · 9.6 mm rain
- Grajaú in SeptemberBrazil · 180 kmHigh 34.4°C · Low 23.5°C · 8.9 mm rain
- Marabá in SeptemberBrazil · 187 kmHigh 33.7°C · Low 24.2°C · 21 mm rain
- Paragominas in SeptemberBrazil · 218 kmHigh 34.1°C · Low 23.4°C · 13 mm rain
- Barra do Corda in SeptemberBrazil · 258 kmHigh 34.9°C · Low 23.9°C · 10 mm rain
- Araguaína in SeptemberBrazil · 261 kmHigh 34.2°C · Low 22.6°C · 25 mm rain
- Tailândia in SeptemberBrazil · 274 kmHigh 34.4°C · Low 24.0°C · 22 mm rain
- Tucuruí in SeptemberBrazil · 275 kmHigh 33.3°C · Low 25.2°C · 27 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 Açailândia) is explained once on the Açailândia year overview and on the Sources, method and limits page.