Climate averages 1991–2020
Altamira weather
in August.
A hot, fairly dry month: the 3rd warmest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a hot month in Altamira: daytime highs average 32.1°C and nights cool to about 23.5°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 31 mm of rain on roughly 7 days, which makes August a fairly dry month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 01 min on an average August day.
The nearest other city in this atlas is Breves (256 km away). In August its highs average 31.9°C, about as warm as Altamira, with 39 mm of rain.
Among the 448 cities listed in Brazil, Altamira ranks joint 48th of 448 for the warmest August highs and joint 199th of 448 for the driest August (rainfall, lowest first). The mean August high of those 448 cities is 26.2°C; Altamira is 5.9°C warmer than that mean.
From August to September, average highs rise by 1.0°C to 33.1°C, and monthly rainfall rises from 31 mm to 34 mm.
The annual picture
August 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
Altamira climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.9°C23.0°C | 23.0°C | 248 | 28.1 | 12.312 h |
| February | 28.5°C22.9°C | 22.9°C | 276 | 26.8 | 12.212 h |
| March | 28.5°C22.9°C | 22.9°C | 328 | 29.1 | 12.112 h |
| April | 28.5°C23.0°C | 23.0°C | 280 | 28.2 | 12.012 h |
| May | 28.8°C23.1°C | 23.1°C | 190 | 26.1 | 12.012 h |
| June | 29.2°C22.9°C | 22.9°C | 71 | 16.5 | 11.912 h |
| July | 30.0°C22.8°C | 22.8°C | 46 | 10.1 | 12.012 h |
| August, selected | 32.1°C23.5°C | 23.5°C | 31 | 7.1 | 12.012 h |
| September | 33.1°C24.2°C | 24.2°C | 34 | 7.0 | 12.112 h |
| October | 33.0°C24.5°C | 24.5°C | 60 | 11.1 | 12.212 h |
| November | 31.9°C24.3°C | 24.3°C | 100 | 14.9 | 12.312 h |
| December | 30.4°C23.8°C | 23.8°C | 152 | 21.9 | 12.312 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
August in nearby cities
- Breves in AugustBrazil · 256 kmHigh 31.9°C · Low 24.1°C · 39 mm rain
- Tucuruí in AugustBrazil · 287 kmHigh 32.6°C · Low 24.5°C · 21 mm rain
- Santarém in AugustBrazil · 290 kmHigh 30.2°C · Low 25.7°C · 74 mm rain
- Cametá in AugustBrazil · 319 kmHigh 32.3°C · Low 24.4°C · 40 mm rain
- Tailândia in AugustBrazil · 362 kmHigh 33.4°C · Low 23.4°C · 19 mm rain
- Santana in AugustBrazil · 370 kmHigh 30.4°C · Low 24.3°C · 59 mm rain
- Macapá in AugustBrazil · 382 kmHigh 30.1°C · Low 24.4°C · 73 mm rain
- São Félix do Xingu in AugustBrazil · 383 kmHigh 33.9°C · Low 22.7°C · 8.9 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 Altamira) is explained once on the Altamira year overview and on the Sources, method and limits page.