SeasonMapAlter do Chão weather in July
Brazil
July in Alter do Chão: hot, rainy, with clean air — an excellent time to visit.
#3 of 12 months in Alter do Chão · #521 of 1383 destinations to visit in July · comfort 84/100 (tier A)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Alter do Chão in July
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Alter do Chão climate normals — July
| Daytime high | 30°C / 85°F | 🥵 hot |
|---|---|---|
| Nighttime low | 27°C / 80°F | |
| Rainfall | 113 mm / 4.4 in | 🌧 rainy |
| Rainy days | 14 days | |
| Humidity | 77% | 💦 very humid |
| Dew point | 24°C / 75°F | |
| Sunshine | 10.5 h/day | |
| Daylight | 12 h | |
| Wind | 13 km/h / 8 mph | |
| Air quality (US AQI) | 31 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Alter do Chão in July
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.
BusyJuly winter break in Brazil, school holidays in 3 of the markets that fill it(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 July
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
High water on the Tapajós
1 Feb – 31 Jul · usuallyFrom February the river swallows the sand and the shoreline becomes flooded forest reached by canoe. The village is at its emptiest and cheapest, and the beach everyone comes for is not there.
Where is Alter do Chão?
Alter do Chão in July — FAQ
- Is July a good time to visit Alter do Chão?
- July in Alter do Chão: hot, rainy, with clean air — an excellent time to visit. It ranks #3 of 12 months for Alter do Chão on SeasonMap's comfort score (84/100).
- What is the weather like in Alter do Chão in July?
- In July, Alter do Chão averages a daily high of 29.5°C and a low of 26.7°C, with about 112.7 mm of rain over roughly 14 rainy days.
- What is the air quality in Alter do Chão in July?
- Alter do Chão has a mean US Air Quality Index of about 31 in July.