August · Brazil
Best time to visit Alter do Chão in August Weather, crowds & prices
Weather in Alter do Chão in August
Average temperature 30°C, 34 mm of rain, about 27 days with 6+ hours of sunshine and 71% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
August score
9.7/10
Ranked #2 of 12 months
- Avg temp
- 30°C
- Rainfall
- 34 mm
- Humidity
- 71%
- Days with 6h+ sun
- 27
- Crowd Density
- Peak Tourist Rush
- Average Expenses
- $$$ · Peak Season Rates ($$$)
August in Alter do Chão scores 9.7/10 for beach and coastal travel - one of the top 12-month picks (#2). Expect around 30°C, 34 mm of rain, and roughly 27 days with 6+ hours of sunshine this month.
The 'Caribbean of the Amazon'—white-sand river islands and clear Tapajós water—peaks in the low-water months from August through December.
August in Alter do Chão — one of the year's strongest windows (2nd)
August averages 30°C (85°F) and humidity near 71%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Expect 34 mm of rain — occasional showers rather than washed-out days — alongside about 27 days with 6+ hours of sunshine and 11.9 daylight hours.
A 9.7/10 puts this among the year's best months in Alter do Chão (2nd of 12); only September scores higher, at 9.9/10.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.
Plan for peak pricing, with this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Frequently asked
- What is the weather like in Alter do Chão in August?
- In August, Alter do Chão averages 30°C, 34 mm of rain, and about 27 days with 6+ hours of sunshine. Its climate-comfort score is 9.7/10.
- Is August a good time to visit Alter do Chão?
- August earns a 9.7/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Alter do Chão in August?
- Expect about 34 mm of rain in August. Average humidity is 71% and there are about 27 days with 6+ hours of sunshine.
Curated in Alter do Chão
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Things to do in Alter do Chão
Alter do Chão, Brazil. Live activities and tours from GetYourGuide, matched to this destination.