May · Brazil
Best time to visit Alter do Chão in May Weather, crowds & prices
Weather in Alter do Chão in May
Average temperature 27°C, 208 mm of rain, about 17 days with 6+ hours of sunshine and 89% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
May score
6.3/10
Ranked #11 of 12 months
- Avg temp
- 27°C
- Rainfall
- 208 mm
- Humidity
- 89%
- Days with 6h+ sun
- 17
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
May in Alter do Chão scores 6.3/10 for beach and coastal travel - ranked #11 of 12. Expect around 27°C, 208 mm of rain, and roughly 17 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.
May in Alter do Chão — middling scores, decent value
May averages 27°C (80°F) and humidity near 89%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
208 mm of rain puts this in monsoon territory — about 17 days with 6+ hours of sunshine across the whole month, and multi-day washouts are normal.
It scores 6.3/10 here, 11th of 12 months, against 9.9/10 in the destination's best month.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
Figure on low-season pricing, with crowds are light for this destination.
Flexible dates? September scores 3.6 points higher here — enough to change the trip.
Frequently asked
- What is the weather like in Alter do Chão in May?
- In May, Alter do Chão averages 27°C, 208 mm of rain, and about 17 days with 6+ hours of sunshine. Its climate-comfort score is 6.3/10.
- Is May a good time to visit Alter do Chão?
- May earns a 6.3/10 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 May?
- Expect about 208 mm of rain in May. Average humidity is 89% and there are about 17 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.