São Sebastião in Spring

In spring (September, October and November), São Sebastião sees average daytime highs around 30°C and overnight lows near 19°C, with 334 mm of rain over about 39 wet days across the season. It is the warmest season of the year and the 2nd-wettest season.

Over the season highs ease from about 30°C in early September to 27°C by late November. The sky is clear or mostly clear about 31% of the time across spring, and the air most often feels humid.

Spring is São Sebastião's 3rd-best season to visit on our travel score. For the whole year in context, see São Sebastião's year-round climate.

Avg daytime high: 30°C; warmest season of the year
Avg overnight low: 19°C
Rainfall: 334 mm; 39 wet days
Avg wind: 8 km/h
Travel score: 4.8; 3rd-best season
Months: Sep · Oct · Nov

← Winter São Sebastião year-round climate Summer →

Spring Summer Fall Winter

Temperature in São Sebastião in Spring

Average highAverage lowShaded bands: 10–90% of days

Over the season highs ease from about 30°C in early September to 27°C by late November.

A typical spring day in São Sebastião reaches about 30°C and drops to 19°C overnight. The warmest of the three months is September, the coolest September.

São Sebastião weather by month

How the three spring months (September, October and November) 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 Spring

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time across spring.

Chance of precipitation in Spring

Any precipitation

São Sebastião gets around 334 mm of rain over 39 wet days across spring. The line is the day-by-day chance of measurable precipitation.

Humidity in Spring

DryComfortableHumidMuggyOppressiveMiserable

Most of spring feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.

Wind in Spring

Winds average 8 km/h across spring.

Sunrise & sunset in Spring

DaylightNight

Daylight runs from about 11 h 42 min in early September to 12 h 54 min by late November. The lit band spans sunrise to sunset each day.

Solar energy in Spring

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day across spring, about 5.9 kWh/m².

Planning a trip in spring

Hazard calendar for São Sebastião

In seasonPeak

In spring, São Sebastião overlaps its monsoon season. The full year is below, with each hazard's peak months called out.

São Sebastião's monsoon runs October–March, when most of the year's rain falls.

Monsoon

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is spring a good time to visit São Sebastião?

Our two travel scores rate spring for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.

4.8

Sightseeing

3rd-best month of the year

6.3

Beach & pool

3rd-best month of the year

spring is a reasonable time to visit São Sebastião for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for São Sebastião in Spring

From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In spring, São Sebastião sees daytime highs around 30°C and nights near 19°C. Pack light clothes, rain gear and sun protection. About 39 days see rain.

light clothesrain gearsun protection

UV index in São Sebastião in Spring

LowModerateHighVery highExtreme

Clear-sky midday UV across spring averages around 13 (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 Spring

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where spring 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

Location & terrain

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.

3 km

233 m

grassland 34%

16 km

343 m

grassland 39%

80 km

779 m

grassland 34%

treesshrubsgrasslandcroplandartificial surfacesbare terrainwater

← Winter São Sebastião year-round climate Summer →

Spring weather nearby: Jardim Botânico 6.0 km · Lago Sul 13 km · Paranoá 14 km · Plano Piloto 17 km · Itapoã 17 km · Park Way 18 km · Sudoeste/Octagonal 20 km · Lago Norte 20 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.