São Sebastião weather in October

In October, São Sebastião sees average daytime highs of 30°C and overnight lows near 19°C, with 104 mm of rain across 13.3 wet days and about 12.4 hours of daylight. It is the 2nd-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 31% of the time in October, and the air most often feels humid.

Daylight stretches from about 12 h 06 min at the start of October to 12 h 36 min by month's end. Set against the rest of the year, October is São Sebastião's 7th-clearest and 5th-windiest month. For the whole year in context, see São Sebastião's year-round climate.

Daytime high
30°
2nd warmest
Overnight low
19°
11th coldest
Rainfall
104 mm
13.3 wet days
Daylight
12 h 24 min
6:45 AM – 7:07 PM
Cloud cover
59%
7th clearest
Wind
8 km/h
5th windiest
Solar energy
6.14 kWh/m²
Travel score
4.6
out of 10

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical October day in São Sebastião reaches about 30°C in the afternoon and slips back to 19°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 34°C. Set against its neighbours, October runs on par with September and about 2°C warmer than November.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13119
23119
33119
43119
53119
63119
73119
83119
93119
103119
113119
123119
133119
143019
153019
163019
173019
183019
193019
203019
213019
223019
233019
243019
253019
263019
272919
282919
292919
302919
312919

São Sebastião weather by month

How October compares with the rest of the year at a glance. October is the 2nd-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 19°2032112.84.6
Feb28° / 19°16018.212.54.8
Mar28° / 19°18120.112.14.8
Apr28° / 18°7111.311.76.1
May27° / 16°173.211.37.7
Jun27° / 14°40.611.18.4
Jul27° / 14°0011.18.6
Aug29° / 15°51.211.57.5
Sep30° / 18°284.811.95.6
Oct30° / 19°10413.312.44.6
Nov28° / 19°20121.212.74.3
Dec28° / 19°22523.212.94.3

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 18% of October, with mostly cloudy or overcast conditions the remaining 52%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15941
25842
35842
45842
55743
65743
75842
85743
95743
105644
115743
125644
135545
145545
155446
165347
175248
185050
194852
204654
214555
224357
234159
243961
253664
263664
273367
283268
293070
303070
312872

Chance of precipitation in October

Any precipitation

São Sebastião gets around 104 mm of rain over 13.3 wet days in October. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 43% and peaks near 59% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
132
233
333
433
534
634
734
835
935
1035
1136
1236
1337
1438
1539
1640
1741
1842
1943
2044
2146
2248
2349
2451
2553
2654
2755
2856
2957
3058
3159

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, October lands in the humid band about 36% of days. Sticky, muggy-or-worse air turns up on roughly 21% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
13026368
22925379
32925379
429243810
529243810
629233711
729233711
829233612
930223613
1030223513
1130213414
1230213415
1330213416
1429203417
1528203418
1627203419
1726203420
1825203421
1923203423
2022203424
2120193526
2219193527
2317193629
2415183631
2513183732
2612183734
2710183835
289173836
298173837
307173838
316173839

Wind in October

Winds average 8 km/h in October.

Across October, daily wind ranges from about 7 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
297calm
307calm
317calm

Sunrise & sunset in October

DaylightNight

Daylight runs from about 12 h 06 min at the start of October to 12 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 30 minutes over October. Sunrise moves from 6:56 AM to 6:38 AM, and sunset from 7:04 PM to 7:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.16:567:04
212.26:557:04
312.26:547:05
412.26:547:05
512.26:537:05
612.26:527:05
712.26:517:05
812.26:517:05
912.36:507:06
1012.36:497:06
1112.36:487:06
1212.36:487:06
1312.36:477:06
1412.36:467:07
1512.46:467:07
1612.46:457:07
1712.46:457:07
1812.46:447:08
1912.46:437:08
2012.46:437:08
2112.46:427:08
2212.46:427:09
2312.56:417:09
2412.56:417:09
2512.56:407:10
2612.56:407:10
2712.56:397:10
2812.56:397:11
2912.56:387:11
3012.66:387:11
3112.66:387:12

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 6.14 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.62 kWh/m² to a high of 6.14 kWh/m² in October across the year — October's 6.14 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.1Intense
26.2Intense
36.2Intense
46.2Intense
56.2Intense
66.2Intense
76.2Intense
86.3Intense
96.3Intense
106.3Intense
116.3Intense
126.3Intense
136.3Intense
146.2Intense
156.2Intense
166.2Intense
176.2Intense
186.2Intense
196.1Intense
206.1Intense
216.1Intense
226.0Intense
236.0Intense
246.0Bright
256.0Bright
265.9Bright
275.9Bright
285.9Bright
295.8Bright
305.8Bright
315.8Bright
Planning a trip in October

Hazard calendar for São Sebastião

In seasonPeak

In October, São Sebastião sits inside 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 October a good time to visit São Sebastião?

Our two travel scores rate October for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

4.6
Sightseeing
9th-best month of the year
6.3
Beach & pool
7th-best month of the year

October 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 October

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

In October, São Sebastião sees daytime highs around 30°C and nights near 19°C. Pack light clothes and sun protection. Worth having: rain gear. About 13 days see rain.

light clothessun protectionrain gear

UV index in São Sebastião in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October peaks 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 15UV 16Jun 23UV 8
UV index (midday)Level
Jan15Extreme
Feb16Extreme
Mar15Extreme
Apr12Extreme
May10Very high
Jun8Very high
Jul8Very high
Aug10Very high
Sep13Extreme
Oct13Extreme
Nov15Extreme
Dec13Extreme

Air quality in São Sebastião in October

GoodModeratePoorUnhealthyVery unhealthy

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateSep 1830 µg/m³Jan 1511 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb13Moderate
Mar15Moderate
Apr14Moderate
May15Moderate
Jun13Moderate
Jul13Moderate
Aug15Moderate
Sep32Moderate
Oct21Moderate
Nov13Moderate
Dec12Moderate
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
16 km
343 m
80 km
779 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
October 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
Roman Catholic 57%Evangelical 27%none 9%other 4%

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. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).