São Sebastião do Passé weather in September

In September, São Sebastião do Passé sees average daytime highs of 28°C and overnight lows near 20°C, with 51 mm of rain across 14.1 wet days and about 11.9 hours of daylight. It is the 8th-warmest and 10th-wettest month of the year here.

Highs climb over the month, from about 27°C in the first days to 29°C by the end. The sky is clear or mostly clear about 21% of the time in September, and the air most often feels muggy.

Daylight stretches from about 11 h 48 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is São Sebastião do Passé's 2nd-clearest and 3rd-windiest month. For the whole year in context, see São Sebastião do Passé's year-round climate.

Daytime high
28°
8th warmest
Overnight low
20°
3rd coldest
Rainfall
51 mm
14.1 wet days
Daylight
11 h 54 min
5:30 AM – 5:26 PM
Cloud cover
56%
2nd clearest
Wind
11 km/h
3rd windiest
Solar energy
5.29 kWh/m²
Travel score
5.4
out of 10

São Sebastião do Passé is human settlement in Brazil.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 27°C in the first days to 29°C by the end.

A typical September day in São Sebastião do Passé reaches about 28°C in the afternoon and slips back to 20°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 31°C. Set against its neighbours, September runs about 2°C warmer than August and about 2°C cooler than October.

15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12720
22720
32720
42720
52720
62820
72820
82820
92820
102820
112820
122820
132820
142820
152820
162820
172820
182820
192821
202921
212921
222921
232921
242921
252921
262921
272921
282921
292921
302921

How September really feels in São Sebastião do Passé

Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

São Sebastião do Passé weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 23°6212.812.73.7
Feb32° / 23°6213.612.43.5
Mar32° / 23°8117.312.13.5
Apr30° / 23°10421.111.73.7
May28° / 22°12921.911.44.5
Jun27° / 21°10422.111.34.7
Jul26° / 20°8220.711.35.1
Aug27° / 20°6118.711.65.3
Sep28° / 20°5114.111.95.4
Oct30° / 22°4810.212.35.0
Nov31° / 23°6010.412.64.3
Dec32° / 23°509.512.74.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 21% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 41% of September, with mostly cloudy or overcast conditions the remaining 38%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16040
25941
35941
45842
55842
65842
75842
85842
95842
105941
115941
126040
136040
146040
156238
166238
176238
186337
196436
206436
216535
226535
236634
246535
256634
266634
276535
286634
296634
306535

Chance of precipitation in September

Any precipitation

São Sebastião do Passé gets around 51 mm of rain over 14.1 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 46% and peaks near 56% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
155
255
355
455
556
656
756
855
955
1054
1153
1252
1351
1450
1548
1647
1746
1844
1943
2041
2140
2239
2338
2437
2536
2635
2735
2834
2934
3034

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 80% of days. Sticky, muggy-or-worse air turns up on roughly 94% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)
198110
298110
398110
498110
598110
698110
798110
888111
988111
1088111
1178211
1278211
1368212
1468212
1558312
1658213
1758213
1848313
1948214
2048115
2148115
2238116
2337918
2437819
2537720
2637621
2737423
2837324
2937225
3037126

Wind in September

Winds average 11 km/h in September.

Across September, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 48 min at the start of September to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 18 minutes over September. Sunrise moves from 5:41 AM to 5:20 AM, and sunset from 5:26 PM to 5:26 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.85:415:26
211.85:405:26
311.85:405:26
411.85:395:26
511.85:385:26
611.85:385:26
711.85:375:26
811.85:365:26
911.85:355:26
1011.95:355:26
1111.95:345:26
1211.95:335:26
1311.95:335:26
1411.95:325:26
1511.95:315:26
1611.95:305:26
1711.95:305:26
1812.05:295:26
1912.05:285:26
2012.05:275:26
2112.05:275:26
2212.05:265:26
2312.05:255:26
2412.05:255:26
2512.05:245:26
2612.15:235:26
2712.15:225:26
2812.15:225:26
2912.15:215:26
3012.15:205:26

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.29 kWh/m².

For context, solar energy here swings from a low near 3.76 kWh/m² to a high of 6.27 kWh/m² in December across the year — September's 5.29 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.9Bright
25.0Bright
35.0Bright
45.0Bright
55.0Bright
65.0Bright
75.0Bright
85.1Bright
95.1Bright
105.1Bright
115.2Bright
125.2Bright
135.2Bright
145.3Bright
155.3Bright
165.3Bright
175.3Bright
185.4Bright
195.4Bright
205.4Bright
215.5Bright
225.5Bright
235.5Bright
245.5Bright
255.6Bright
265.6Bright
275.6Bright
285.6Bright
295.7Bright
305.7Bright
Planning a trip in September

Is September a good time to visit São Sebastião do Passé?

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

5.4
Sightseeing
1st-best month of the year
6.3
Beach & pool
4th-best month of the year

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

What to pack for São Sebastião do Passé in September

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

In September, São Sebastião do Passé sees daytime highs around 28°C and nights near 20°C. Pack light clothes and rain gear. Worth having: sun protection. About 14 days see rain.

light clothesrain gearsun protection

Sea temperature near São Sebastião do Passé in September

The nearest coast averages about 26°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 57 km away) is warmest in March at about 28°C and coldest in August near 25°C.

The water stays above 20°C all year — warm enough for a swim any month.

24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan28Warm
Feb28Tropical
Mar28Tropical
Apr28Tropical
May28Warm
Jun27Warm
Jul26Warm
Aug25Warm
Sep26Warm
Oct26Warm
Nov27Warm
Dec27Warm

UV index in São Sebastião do Passé in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 11 (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 do Passé peaks around February 17 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 9 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 17UV 15Jun 23UV 9
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar14Extreme
Apr12Extreme
May9Very high
Jun9Very high
Jul9Very high
Aug10Very high
Sep11Extreme
Oct12Extreme
Nov13Extreme
Dec13Extreme
Location & terrain

Where is São Sebastião do Passé?

São Sebastião do Passé sits at 12.5°S, 38.5°W, 51 m above sea level, in Brazil. The nearest listed city is Candeias, 18 km away.

Topography around São Sebastião do Passé

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of São Sebastião do Passé.

Within 3 km, the terrain around São Sebastião do Passé has only modest variations in elevation — a maximum elevation change of 117 m around an average of 61 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 207 m; within 80 km, large variations in elevation — a maximum elevation change of 602 m.

The land around São Sebastião do Passé is covered by grassland (70%) and trees (21%) within 3 km, grassland (61%) and trees (38%) within 16 km, and grassland (34%), trees (33%) and water (26%) within 80 km.

3 km
117 m
16 km
207 m
80 km
602 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwatermangroves
September weather nearby: Candeias 18 km · Pojuca 20 km · Mata de São João 21 km · Catu 22 km · São Francisco do Conde 24 km · Santo Amaro 24 km · Dias d'Ávila 24 km · Camaçari 28 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 do Passé (-12.5125°, -38.4953°, elevation 51 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).