Climate averages 1991–2020
Santarém weather
in August.
A hot, moderately wet month: the 4th warmest and the 2nd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a hot month in Santarém: daytime highs average 30.2°C and nights cool to about 25.7°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 74 mm of rain on roughly 13 days, which makes August a moderately wet month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 02 min on an average August day.
The nearest other city in this atlas is Oriximiná (149 km away). In August its highs average 31.0°C, 0.8°C warmer than Santarém, with 70 mm of rain.
Among the 448 cities listed in Brazil, Santarém ranks joint 81st of 448 for the warmest August highs and 359th of 448 for the driest August (rainfall, lowest first). The mean August high of those 448 cities is 26.2°C; Santarém is 4.0°C warmer than that mean.
From August to September, average highs rise by 1.0°C to 31.2°C, and monthly rainfall falls from 74 mm to 68 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
Santarém climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.6°C24.7°C | 24.7°C | 409 | 28.2 | 12.212 h |
| February | 28.3°C24.5°C | 24.5°C | 391 | 26.1 | 12.212 h |
| March | 28.3°C24.5°C | 24.5°C | 488 | 29.3 | 12.112 h |
| April | 28.2°C24.5°C | 24.5°C | 450 | 29.2 | 12.112 h |
| May | 28.3°C24.6°C | 24.6°C | 365 | 29.6 | 12.012 h |
| June | 28.5°C24.8°C | 24.8°C | 187 | 24.8 | 12.012 h |
| July | 28.9°C25.0°C | 25.0°C | 114 | 19.2 | 12.012 h |
| August, selected | 30.2°C25.7°C | 25.7°C | 74 | 13.0 | 12.012 h |
| September | 31.2°C26.2°C | 26.2°C | 68 | 10.5 | 12.112 h |
| October | 31.4°C26.5°C | 26.5°C | 107 | 11.9 | 12.212 h |
| November | 30.7°C26.2°C | 26.2°C | 149 | 16.6 | 12.212 h |
| December | 29.9°C25.7°C | 25.7°C | 233 | 21.7 | 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
- Oriximiná in AugustBrazil · 149 kmHigh 31.0°C · Low 24.8°C · 70 mm rain
- Parintins in AugustBrazil · 226 kmHigh 30.9°C · Low 24.6°C · 84 mm rain
- Itaituba in AugustBrazil · 248 kmHigh 32.5°C · Low 23.5°C · 52 mm rain
- Altamira in AugustBrazil · 290 kmHigh 32.1°C · Low 23.5°C · 31 mm rain
- Itacoatiara in AugustBrazil · 422 kmHigh 30.6°C · Low 24.9°C · 89 mm rain
- Santana in AugustBrazil · 475 kmHigh 30.4°C · Low 24.3°C · 59 mm rain
- Breves in AugustBrazil · 477 kmHigh 31.9°C · Low 24.1°C · 39 mm rain
- Macapá in AugustBrazil · 490 kmHigh 30.1°C · Low 24.4°C · 73 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 Santarém) is explained once on the Santarém year overview and on the Sources, method and limits page.