SeasonMapAlter do Chão weather by month
Brazil
The best time to visit Alter do Chão is July to September — 88/100 in August, 32°C and 9 rainy days. The best season is the dry season, June to November (83/100 on average).
The worst month is March at 57/100 — sweltering, soaked, clean air. See March →
Updated September 2026 · climate normals from ERA5 reanalysis
Planning the wider trip? Best time to visit Brazil →
Alter do Chão, month by month
Comfort score out of 100 for the kind of trip Alter do Chão is best for, the average high, rainy days and hours of sun a day from the climate normals, and how busy it tends to be.
| Month | Score | Tier | High | Rain | Sun | Crowds | On |
|---|---|---|---|---|---|---|---|
| JanJanuary | 61 | C | 30°C | 27 d | 9 h | Peak | 1 |
| FebFebruary | 59 | D | 30°C | 25 d | 9 h | Busy | 1 |
| MarMarch | 57 | D | 30°C | 28 d | 8 h | Quiet | 1 |
| AprApril | 58 | D | 30°C | 29 d | 8 h | Quiet | 1 |
| MayMay | 65 | C | 30°C | 29 d | 9 h | Shoulder | 1 |
| JunJune | 80 | A | 30°C | 23 d | 10 h | Shoulder | 1 |
| JulJuly | 85 | A | 31°C | 14 d | 11 h | Busy | 1 |
| AugAugust | 88 | A | 32°C | 9 d | 11 h | Busy | 1 |
| SepSeptember | 87 | A | 33°C | 7 d | 11 h | Peak | 2 |
| OctOctober | 82 | A | 33°C | 11 d | 11 h | Busy | 1 |
| NovNovember | 77 | B | 32°C | 16 d | 10 h | Busy | 1 |
| DecDecember | 63 | C | 31°C | 25 d | 9 h | Peak | 1 |
What's on in Alter do Chão through the year
Festivals, natural spectacles, holidays and the seasons to watch out for — curated and sourced. The month pages carry the detail.
Crowds in Alter do Chão in August
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.
BusyRiver beaches emerge(estimated)
Peak crowdsBusyShoulder seasonQuiet