SeasonMapBarreirinhas (Lençóis Maranhenses) weather in January
Brazil
January in Barreirinhas: hot, rainy, with clean air — fine if you can take 26 rainy days.
#5 of 12 months in Barreirinhas · #806 of 1383 destinations to visit in January · comfort 65/100 (tier C)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Barreirinhas in January
No notes yet. Open Barreirinhas on the map to add the first one.
Barreirinhas climate normals — January
| Daytime high | 29°C / 85°F | 🥵 hot |
|---|---|---|
| Nighttime low | 25°C / 76°F | |
| Sea temperature | 29°C / 84°F | ♨️ bath-warm |
| Rainfall | 150 mm / 5.9 in | 🌧 rainy |
| Rainy days | 26 days | |
| Humidity | 83% | 💦 very humid |
| Dew point | 23°C / 74°F | |
| Sunshine | 10 h/day | |
| Daylight | 12.3 h | |
| Wind | 18 km/h / 11 mph | |
| Air quality (US AQI) | 30 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Barreirinhas in January
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.
BusySummer holidays in Brazil, school holidays in 3 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Barreirinhas's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherBarreirinhas's weather peaks June–August.
Best weatherFair weatherToughest weather
What's on in Barreirinhas in January
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Dunes without water
15 Nov – 28 Feb · usuallyOff-season shutdownBetween the last lagoons drying out and the new rains filling them the dunes are bare sand — a stranger, emptier place, and the months the agencies push the river and delta trips instead.
Where is Barreirinhas?
Barreirinhas in January — FAQ
- Is January a good time to visit Barreirinhas?
- January in Barreirinhas: hot, rainy, with clean air — fine if you can take 26 rainy days. It ranks #5 of 12 months for Barreirinhas on SeasonMap's comfort score (65/100).
- What is the weather like in Barreirinhas in January?
- In January, Barreirinhas averages a daily high of 29.4°C and a low of 24.7°C, with about 149.8 mm of rain over roughly 26.2 rainy days.
- What is the air quality in Barreirinhas in January?
- Barreirinhas has a mean US Air Quality Index of about 30 in January.