São João do Soter weather in September

In September, São João do Soter sees average daytime highs of 36°C and overnight lows near 23°C, with 8 mm of rain across 1.4 wet days and about 12 hours of daylight. It is the 1st-warmest and 11th-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 67% 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 João do Soter's 2nd-clearest and 3rd-windiest month. For the whole year in context, see São João do Soter's year-round climate.

Daytime high
36°
1st warmest
Overnight low
23°
9th coldest
Rainfall
8 mm
1.4 wet days
Daylight
12 hours
5:50 AM – 5:49 PM
Cloud cover
35%
2nd clearest
Wind
8 km/h
3rd windiest
Solar energy
6.4 kWh/m²
Travel score
2.8
out of 10

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 João do Soter reaches about 36°C in the afternoon and slips back to 23°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)
13523
23523
33523
43523
53523
63523
73523
83523
93523
103523
113623
123623
133623
143623
153623
163623
173623
183624
193624
203624
213624
223624
233624
243624
253624
263624
273624
283624
293624
303624

How September really feels in São João do Soter

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
3 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 João do Soter weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 23°24025.312.32.7
Feb31° / 23°25624.412.22.7
Mar31° / 23°30828.3122.6
Apr31° / 23°24725.111.92.9
May31° / 23°11615.211.83.8
Jun32° / 23°184.111.74.4
Jul33° / 23°81.511.74.3
Aug34° / 23°30.711.83.6
Sep36° / 23°81.4122.8
Oct36° / 24°193.612.12.6
Nov35° / 24°608.712.22.8
Dec33° / 24°12115.212.32.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 67% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 21% of September, with mostly cloudy or overcast conditions the remaining 12%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18812
28911
38812
48812
58812
68812
78812
88812
98812
108812
118812
128812
138911
148911
158911
168911
178911
188911
198812
208911
218911
228911
238911
248911
258812
268812
278812
288812
298614
308614

Chance of precipitation in September

Any precipitation

São João do Soter gets around 8 mm of rain over 1.4 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 5% and peaks near 7% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
13
23
33
43
53
64
74
84
94
104
114
124
134
144
154
164
174
184
194
205
215
225
236
246
256
266
277
287
297
307

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 51% of days. Sticky, muggy-or-worse air turns up on roughly 75% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
15314419
25314519
35314519
45314519
55314519
66314519
76304519
86304519
96304619
106294619
115294719
125284719
135274820
145264920
155255021
165235121
174225222
184205323
194195324
203175525
213165526
223145627
232135728
242115829
252105929
26295930
27186031
28185932
29176032
30175933

Wind in September

Winds average 8 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
287calm
297calm
307calm

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 5:58 AM to 5:43 AM, and sunset from 5:52 PM to 5:46 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.95:585:52
211.95:575:52
311.95:575:52
411.95:565:51
511.95:565:51
611.95:555:51
711.95:555:51
811.95:545:51
911.95:545:50
1011.95:535:50
1111.95:535:50
1212.05:525:50
1312.05:525:49
1412.05:515:49
1512.05:515:49
1612.05:505:49
1712.05:505:49
1812.05:495:48
1912.05:495:48
2012.05:485:48
2112.05:485:48
2212.05:475:47
2312.05:475:47
2412.05:465:47
2512.05:465:47
2612.05:455:47
2712.05:455:46
2812.05:445:46
2912.05:445:46
3012.05:435:46

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.4 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.45 kWh/m² to a high of 6.4 kWh/m² in September across the year — September's 6.4 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.3Intense
26.3Intense
36.3Intense
46.3Intense
56.3Intense
66.3Intense
76.3Intense
86.3Intense
96.4Intense
106.4Intense
116.4Intense
126.4Intense
136.4Intense
146.4Intense
156.4Intense
166.4Intense
176.4Intense
186.4Intense
196.4Intense
206.4Intense
216.4Intense
226.4Intense
236.4Intense
246.4Intense
256.4Intense
266.4Intense
276.4Intense
286.4Intense
296.4Intense
306.4Intense
Planning a trip in September

Hazard calendar for São João do Soter

In seasonPeak

None of São João do Soter'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 João do Soter's monsoon runs January–April, 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 João do Soter?

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

2.8
Sightseeing
7th-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 João do Soter. The water and warmth also suit a beach or pool day.

What to pack for São João do Soter in September

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

In September, São João do Soter sees daytime highs around 36°C and nights near 23°C. Pack light clothes and sun protection.

light clothessun protection

UV index in São João do Soter 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 João do Soter peaks around March 12 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near August 10 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeMar 12UV 15Aug 10UV 10
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug10Very high
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec11Extreme

Air quality in São João do Soter 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 João do Soter is worst in October — around 83 µg/m³ PM2.5 (unhealthy), about 7.2× the cleanest month (May, 12 µg/m³).

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

0306090JanFebMarAprMayJunJulAugSepOctNovDecModerateModeratePoorUnhealthyModerateOct 1578 µg/m³May 1112 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb14Moderate
Mar13Moderate
Apr12Moderate
May12Good
Jun16Moderate
Jul18Moderate
Aug32Moderate
Sep53Poor
Oct83Unhealthy
Nov39Poor
Dec26Moderate
Location & terrain

Where is São João do Soter?

São João do Soter sits at 5.1°S, 43.8°W, 114 m above sea level, in Brazil. The nearest listed city is Caxias, 58 km away.

Topography around São João do Soter

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

Within 3 km, the terrain around São João do Soter has only modest variations in elevation — a maximum elevation change of 68 m around an average of 132 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 184 m; within 80 km, significant variations in elevation — a maximum elevation change of 268 m.

The land around São João do Soter is covered by trees (64%) and grassland (23%) within 3 km, trees (66%) and grassland (23%) within 16 km, and trees (66%) and grassland (25%) within 80 km.

3 km
68 m
16 km
184 m
80 km
268 m
treesshrubsgrasslandcroplandartificial surfaces
September weather nearby: Caxias 58 km · Aldeias Altas 66 km · Dom Pedro 70 km · Codó 74 km · Presidente Dutra 78 km · Fortuna 79 km · Buriti Bravo 80 km · Matões 81 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 João do Soter (-5.1139°, -43.81°, elevation 114 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).