SeasonMapAlter do Chão weather in August
Brazil
August in Alter do Chão: hot, a little rain, with clean air — one of the best months to visit.
#2 of 12 months in Alter do Chão · #335 of 1383 destinations to visit in August · comfort 87/100 (tier A)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Alter do Chão in August
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Alter do Chão climate normals — August
| Daytime high | 31°C / 87°F | 🥵 hot |
|---|---|---|
| Nighttime low | 27°C / 81°F | |
| Rainfall | 68 mm / 2.7 in | 🌦 some rain |
| Rainy days | 9 days | |
| Humidity | 72% | 💧 humid |
| Dew point | 24°C / 74°F | |
| Sunshine | 10.8 h/day | |
| Daylight | 12 h | |
| Wind | 14 km/h / 9 mph | |
| Air quality (US AQI) | 37 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Alter do Chão in August
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
BusyRiver beaches emerge(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Alter do Chão's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Best weatherAlter do Chão's weather peaks July–September.
Best weatherFair weatherToughest weather
What's on in Alter do Chão in August
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
River beaches emerge
1 Aug – 31 Jan · usuallyHigh waterCrowdedThe Tapajós drops from August and the white sandbanks in front of the village come back out of the water. By September you can wade to the Ilha do Amor, and in a hard year walk to it.
Where is Alter do Chão?
Alter do Chão in August — FAQ
- Is August a good time to visit Alter do Chão?
- August in Alter do Chão: hot, a little rain, with clean air — one of the best months to visit. It ranks #2 of 12 months for Alter do Chão on SeasonMap's comfort score (87/100).
- What is the weather like in Alter do Chão in August?
- In August, Alter do Chão averages a daily high of 30.7°C and a low of 27.3°C, with about 68.1 mm of rain over roughly 9.2 rainy days.
- What is the air quality in Alter do Chão in August?
- Alter do Chão has a mean US Air Quality Index of about 37 in August.