São Bernardo weather in September

In September, São Bernardo sees average daytime highs of 36°C and overnight lows near 24°C, with 2 mm of rain across 0.5 wet days and about 12 hours of daylight. It is the 3rd-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 36°C through the month. The sky is clear or mostly clear about 73% of the time in September, and the air most often feels muggy.

Daylight stretches from about 11 h 54 min at the start of September to 12 hours by month's end. Set against the rest of the year, September is São Bernardo's 1st-clearest and 3rd-windiest month. For the whole year in context, see São Bernardo's year-round climate.

Daytime high
36°
3rd warmest
Overnight low
24°
8th coldest
Rainfall
2 mm
0.5 wet days
Daylight
12 hours
5:45 AM – 5:43 PM
Cloud cover
33%
1st clearest
Wind
14 km/h
3rd windiest
Solar energy
6.56 kWh/m²
Travel score
2.8
out of 10

São Bernardo 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

Day-to-day highs hold fairly steady near 36°C through the month.

A typical September day in São Bernardo reaches about 36°C in the afternoon and slips back to 24°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 34°C and 37°C. Set against its neighbours, September runs about 1°C warmer than August and on par with October.

20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13524
23524
33524
43524
53524
63524
73524
83524
93624
103624
113624
123624
133624
143624
153624
163624
173624
183624
193624
203624
213624
223624
233624
243624
253624
263624
273624
283624
293624
303624

How September really feels in São Bernardo

Once humidity and wind are folded in, September averages 30 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
30
4 feel dangerously hot (≥ 39°C)
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

São Bernardo weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 24°16619.512.22.8
Feb31° / 24°21722.312.12.8
Mar31° / 24°28127.2122.7
Apr31° / 23°29425.711.92.8
May31° / 24°18018.511.83.5
Jun32° / 23°44911.84.3
Jul33° / 23°233.811.84.4
Aug34° / 23°40.811.93.6
Sep36° / 24°20.5122.8
Oct36° / 24°81.312.12.5
Nov36° / 24°132.712.22.5
Dec35° / 24°497.312.22.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 73% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 20% of September, with mostly cloudy or overcast conditions the remaining 7%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1937
2946
3946
4946
5946
6946
7946
8955
9955
10955
11955
12955
13955
14946
15937
16937
17937
18937
19928
20928
21928
22928
23928
24928
25928
26919
27919
28919
29919
30919

Chance of precipitation in September

Any precipitation

São Bernardo gets around 2 mm of rain over 0.5 wet days in September, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 2% and peaks near 3% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
12
22
31
41
51
61
71
81
91
101
112
122
132
142
152
162
172
182
192
202
212
222
232
242
252
262
272
282
292
303

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 81% of days. Sticky, muggy-or-worse air turns up on roughly 97% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)
137918
238017
338116
438116
548115
648214
748214
848313
948313
1048313
1148313
1248214
1348214
1438314
1538215
1638215
1738116
1838017
1938017
2037918
2137918
2237918
2337918
2437819
2537819
2627919
2727919
2827919
2927919
3027919

Wind in September

Winds average 14 km/h in September.

Across September, daily wind ranges from about 13 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2715light breeze
2815light breeze
2915light breeze
3015light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 54 min at the start of September to 12 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over September. Sunrise moves from 5:51 AM to 5:38 AM, and sunset from 5:47 PM to 5:40 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.95:515:47
211.95:515:47
311.95:505:47
411.95:505:47
511.95:505:46
612.05:495:46
712.05:495:46
812.05:485:46
912.05:485:45
1012.05:475:45
1112.05:475:45
1212.05:465:45
1312.05:465:44
1412.05:455:44
1512.05:455:44
1612.05:455:43
1712.05:445:43
1812.05:445:43
1912.05:435:43
2012.05:435:42
2112.05:425:42
2212.05:425:42
2312.05:415:42
2412.05:415:41
2512.05:405:41
2612.05:405:41
2712.05:395:40
2812.05:395:40
2912.05:395:40
3012.05:385:40

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.56 kWh/m².

For context, solar energy here swings from a low near 4.64 kWh/m² to a high of 6.67 kWh/m² in October across the year — September's 6.56 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.3Intense
26.4Intense
36.4Intense
46.4Intense
56.4Intense
66.4Intense
76.5Intense
86.5Intense
96.5Intense
106.5Intense
116.5Intense
126.5Intense
136.5Intense
146.5Intense
156.6Intense
166.6Intense
176.6Intense
186.6Intense
196.6Intense
206.6Intense
216.6Intense
226.6Intense
236.6Intense
246.6Intense
256.7Intense
266.7Intense
276.7Intense
286.7Intense
296.7Intense
306.7Intense
Planning a trip in September

Hazard calendar for São Bernardo

In seasonPeak

None of São Bernardo's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

São Bernardo's monsoon runs January–May, when most of the year's rain falls.

Monsoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit São Bernardo?

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

2.8
Sightseeing
5th-best month of the year
6.4
Beach & pool
4th-best month of the year

September is a weaker month for outdoor sightseeing in São Bernardo. The water and warmth also suit a beach or pool day.

What to pack for São Bernardo in September

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

In September, São Bernardo sees daytime highs around 36°C and nights near 24°C. Pack light clothes and sun protection.

light clothessun protection

UV index in São Bernardo in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 12 (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 Bernardo peaks around March 16 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 14 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeExtremeMar 16UV 15Jul 14UV 10
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar15Extreme
Apr14Extreme
May11Extreme
Jun10Extreme
Jul10Very high
Aug10Extreme
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec11Extreme

Air quality in São Bernardo in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in São Bernardo is worst in July — around 20 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (May, 8 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateGoodModerateJul 1719 µg/m³May 219 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb15Moderate
Mar14Moderate
Apr11Good
May8Good
Jun9Good
Jul20Moderate
Aug12Good
Sep9Good
Oct11Good
Nov14Moderate
Dec14Moderate
Location & terrain

Where is São Bernardo?

São Bernardo sits at 3.4°S, 42.4°W, 29 m above sea level, in Brazil. The nearest listed city is Luzilândia, 12 km away.

Topography around São Bernardo

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

Within 3 km, the terrain around São Bernardo has only modest variations in elevation — a maximum elevation change of 69 m around an average of 43 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 110 m; within 80 km, only modest variations in elevation — a maximum elevation change of 246 m.

The land around São Bernardo is covered by trees (63%) and grassland (28%) within 3 km, trees (60%) and grassland (24%) within 16 km, and trees (59%) within 80 km.

3 km
69 m
16 km
110 m
80 km
246 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetlandmangroves
September weather nearby: Luzilândia 12 km · Santa Quitéria do Maranhão 22 km · Brejo 51 km · Esperantina 63 km · Buriti dos Lopes 65 km · Tutóia 69 km · Paulino Neves 73 km · Araioses 78 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 Bernardo (-3.3614°, -42.4178°, elevation 29 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).