January · Brazil
Best time to visit Alter do Chão in January Weather, crowds & prices
Weather in Alter do Chão in January
Average temperature 27°C, 222 mm of rain, about 19 days with 6+ hours of sunshine and 80% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
January score
6.6/10
Ranked #8 of 12 months
- Avg temp
- 27°C
- Rainfall
- 222 mm
- Humidity
- 80%
- Days with 6h+ sun
- 19
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $$ · Moderate Cost ($$)
January in Alter do Chão scores 6.6/10 for beach and coastal travel - ranked #8 of 12. Expect around 27°C, 222 mm of rain, and roughly 19 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.
January in Alter do Chão — middling scores, decent value
Days in January average 27°C (81°F) and humidity near 80% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
Expect monsoon-level rainfall at 222 mm: only about 19 days with 6+ hours of sunshine across the month, and stretches of heavy rain are normal.
That is 6.6/10 on the same scale — 8th of 12 months, versus 9.9/10 for the best month here.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
Budget for mid-season pricing, and crowds are light for this destination.
If your dates are flexible, September is materially better in Alter do Chão — 3.3 points higher on the same scale.
Frequently asked
- What is the weather like in Alter do Chão in January?
- In January, Alter do Chão averages 27°C, 222 mm of rain, and about 19 days with 6+ hours of sunshine. Its climate-comfort score is 6.6/10.
- Is January a good time to visit Alter do Chão?
- January earns a 6.6/10 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 January?
- Expect about 222 mm of rain in January. Average humidity is 80% and there are about 19 days with 6+ hours of sunshine.
Curated in Alter do Chão
Tickets & experiences
Things to do in Alter do Chão
Alter do Chão, Brazil. Live activities and tours from GetYourGuide, matched to this destination.