October · Brazil
Best time to visit Alter do Chão in October Weather, crowds & prices
Weather in Alter do Chão in October
Average temperature 32°C, 39 mm of rain, about 26 days with 6+ hours of sunshine and 58% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
October score
9.7/10
Ranked #3 of 12 months
- Avg temp
- 32°C
- Rainfall
- 39 mm
- Humidity
- 58%
- Days with 6h+ sun
- 26
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$$ · Peak Season Rates ($$$)
October in Alter do Chão scores 9.7/10 for beach and coastal travel - one of the top 12-month picks (#3). Expect around 32°C, 39 mm of rain, and roughly 26 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.
October in Alter do Chão — one of the year's strongest windows (3rd)
At 32°C (90°F), October is at its most extreme: early starts are not optional, and afternoons belong indoors.
With around 39 mm of rain, any showers tend to pass through rather than settle in; about 26 days with 6+ hours of sunshine and 12.1 hours of daylight fill the rest.
On our climate-comfort scale this is one of the strongest months of the year for Alter do Chão at 9.7/10 (3rd of 12), just behind September at 9.9/10.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary.
Expect peak pricing, and crowds are moderate. 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 October?
- In October, Alter do Chão averages 32°C, 39 mm of rain, and about 26 days with 6+ hours of sunshine. Its climate-comfort score is 9.7/10.
- Is October a good time to visit Alter do Chão?
- October 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 October?
- Expect about 39 mm of rain in October. Average humidity is 58% and there are about 26 days with 6+ hours of sunshine.
Curated in Alter do Chão
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Alter do Chão, Brazil. Live activities and tours from GetYourGuide, matched to this destination.