São Sebastião in Winter
In winter (June, July and August), São Sebastião sees average daytime highs around 27°C and overnight lows near 14°C, with 9 mm of rain over about 2 wet days across the season. It is the coldest season of the year and the driest season of the year.
Over the season highs climb from about 27°C in early June to 30°C by late August. The sky is clear or mostly clear about 66% of the time across winter, and the air most often feels dry.
Winter is São Sebastião's best season of the year to visit on our travel score. For the whole year in context, see São Sebastião's year-round climate.
- Avg daytime high
- 27°C
- coldest season of the year
- Avg overnight low
- 14°C
- Rainfall
- 9 mm
- 2 wet days
- Avg wind
- 9 km/h
- Travel score
- 8.2
- best season of the year
- Months
- Jun · Jul · Aug
Temperature in São Sebastião in Winter
Over the season highs climb from about 27°C in early June to 30°C by late August.
A typical winter day in São Sebastião reaches about 27°C and drops to 14°C overnight. The warmest of the three months is August, the coolest July.
São Sebastião weather by month
How the three winter months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 28° / 19° | 203 | 21 | 12.8 | 4.6 |
| Feb | 28° / 19° | 160 | 18.2 | 12.5 | 4.8 |
| Mar | 28° / 19° | 181 | 20.1 | 12.1 | 4.8 |
| Apr | 28° / 18° | 71 | 11.3 | 11.7 | 6.1 |
| May | 27° / 16° | 17 | 3.2 | 11.3 | 7.7 |
| Jun | 27° / 14° | 4 | 0.6 | 11.1 | 8.4 |
| Jul | 27° / 14° | 0 | 0 | 11.1 | 8.6 |
| Aug | 29° / 15° | 5 | 1.2 | 11.5 | 7.5 |
| Sep | 30° / 18° | 28 | 4.8 | 11.9 | 5.6 |
| Oct | 30° / 19° | 104 | 13.3 | 12.4 | 4.6 |
| Nov | 28° / 19° | 201 | 21.2 | 12.7 | 4.3 |
| Dec | 28° / 19° | 225 | 23.2 | 12.9 | 4.3 |
Cloud cover in Winter
The sky is clear or mostly clear about 66% of the time across winter.
Chance of precipitation in Winter
São Sebastião gets around 9 mm of rain over 2 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 9 km/h across winter.
Sunrise & sunset in Winter
Daylight runs from about 11 h 06 min in early June to 11 h 42 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Winter
Average shortwave solar energy reaching the ground each day across winter, about 5.0 kWh/m².
Hazard calendar for São Sebastião
None of São Sebastião's seasonal hazards peak in winter. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do.
São Sebastião's monsoon runs October–March, when most of the year's rain falls.
Is winter a good time to visit São Sebastião?
Our two travel scores rate winter for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
winter is one of the better times to visit São Sebastião for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for São Sebastião in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, São Sebastião sees daytime highs around 27°C and nights near 14°C. Pack light clothes. Worth having: sun protection.
UV index in São Sebastião in Winter
Clear-sky midday UV across winter averages around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in São Sebastião peaks around February 15 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 8 (very high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 15 | 16 | 15 | 12 | 10 | 8 | 8 | 10 | 13 | 13 | 15 | 13 |
| Level | Extreme | Extreme | Extreme | Extreme | Very high | Very high | Very high | Very high | Extreme | Extreme | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 15 | Extreme |
| Feb | 16 | Extreme |
| Mar | 15 | Extreme |
| Apr | 12 | Extreme |
| May | 10 | Very high |
| Jun | 8 | Very high |
| Jul | 8 | Very high |
| Aug | 10 | Very high |
| Sep | 13 | Extreme |
| Oct | 13 | Extreme |
| Nov | 15 | Extreme |
| Dec | 13 | Extreme |
Air quality in São Sebastião in Winter
Average fine-particle pollution (PM2.5) through the year — so you can see where winter falls, not just the annual average.
Air quality in São Sebastião is worst in September — around 32 µg/m³ PM2.5 (moderate), about 2.8× the cleanest month (January, 11 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 11 | 13 | 15 | 14 | 15 | 13 | 13 | 15 | 32 | 21 | 13 | 12 |
| Level | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 11 | Good |
| Feb | 13 | Moderate |
| Mar | 15 | Moderate |
| Apr | 14 | Moderate |
| May | 15 | Moderate |
| Jun | 13 | Moderate |
| Jul | 13 | Moderate |
| Aug | 15 | Moderate |
| Sep | 32 | Moderate |
| Oct | 21 | Moderate |
| Nov | 13 | Moderate |
| Dec | 12 | Moderate |
Where is São Sebastião?
São Sebastião sits at 15.9°S, 47.8°W, 1,048 m above sea level, in Brazil. The nearest listed city is Jardim Botânico, 6.0 km away.
Topography around São Sebastião
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of São Sebastião.
Within 3 km, the terrain around São Sebastião has only modest variations in elevation — a maximum elevation change of 233 m around an average of 968 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 343 m; within 80 km, large variations in elevation — a maximum elevation change of 779 m.
The land around São Sebastião is covered by grassland (34%), artificial surfaces (31%) and trees (23%) within 3 km, grassland (39%), trees (24%) and shrubs (21%) within 16 km, and grassland (34%), trees (25%) and cropland (22%) within 80 km.
Brazil travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type C / N
- 127 / 220 V · 60 Hz
- Prices
- ≈ 46% of US
- price level, 2025
- GDP per capita
- $10,713
- 2025
- Happiness
- 6.6 / 10
- World Happiness, 2025
- Safe drinking water
- 89%
- of population, 2024
- Homicide rate
- 19.3
- per 100k, 2023
- Road deaths
- 16
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Low
- EF EPI 482
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for São Sebastião (-15.9029°, -47.7761°, elevation 1,048 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.