São João dos Patos weather in September

In September, São João dos Patos sees average daytime highs of 35°C and overnight lows near 24°C, with 10 mm of rain across 0.8 wet days and about 12 hours of daylight. It is the 1st-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 35°C through the month. The sky is clear or mostly clear about 74% of the time in September, and the air most often feels humid.

Daylight stretches from about 11 h 54 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 João dos Patos's 2nd-clearest and 4th-windiest month. For the whole year in context, see São João dos Patos's year-round climate.

Daytime high
35°
1st warmest
Overnight low
24°
11th coldest
Rainfall
10 mm
0.8 wet days
Daylight
12 hours
5:50 AM – 5:48 PM
Cloud cover
29%
2nd clearest
Wind
10 km/h
4th windiest
Solar energy
6.65 kWh/m²
Travel score
3.2
out of 10

São João dos Patos is 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 35°C through the month.

A typical September day in São João dos Patos reaches about 35°C in the afternoon and slips back to 24°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 33°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
93524
103524
113524
123524
133524
143524
153524
163524
173524
183524
193524
203524
213524
223524
233524
243524
253524
263525
273525
283525
293525
303525

How September really feels in São João dos Patos

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
heat index over the day's high
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 dos Patos weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 23°22725.212.33.1
Feb30° / 22°21522.912.23.1
Mar30° / 22°23126123.0
Apr31° / 23°14219.111.93.6
May31° / 23°508.311.74.5
Jun32° / 23°61.211.65.0
Jul32° / 23°40.511.74.9
Aug34° / 23°1011.84.1
Sep35° / 24°100.8123.2
Oct35° / 25°334.712.13.0
Nov33° / 24°9611.312.33.4
Dec31° / 23°14717.312.43.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 74% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 12%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1919
2919
3919
49010
59010
69010
78911
88911
98911
108911
118911
128911
138911
148911
158812
168812
178812
188812
198812
208812
218812
228812
238812
248614
258614
268614
278614
288515
298416
308416

Chance of precipitation in September

Any precipitation

São João dos Patos gets around 10 mm of rain over 0.8 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 3% and peaks near 6% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
11
21
31
41
51
61
72
82
92
102
112
122
132
142
152
162
173
183
193
203
214
224
234
244
255
265
275
286
296
306

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the humid band about 43% of days. Sticky, muggy-or-worse air turns up on roughly 21% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
124442101
234442101
334442111
434341112
534341112
634341122
734341122
834241122
934241122
1034241122
1134142132
1234142132
1324042132
1423943142
1523843152
1623743152
1723643162
1823443183
1913344193
2013244203
2113044213
2212945224
2312745234
2412645244
2512445255
2612344266
2712144276
2812044287
2911944288
3011844298

Wind in September

Winds average 10 km/h in September.

Across September, daily wind ranges from about 9 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
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 54 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 12 minutes over September. Sunrise moves from 5:58 AM to 5:43 AM, and sunset from 5:51 PM to 5:46 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.95:585:51
211.95:585:51
311.95:575:50
411.95:575:50
511.95:565:50
611.95:565:50
711.95:555:50
811.95:555:50
911.95:545:49
1011.95:545:49
1111.95:535:49
1211.95:525:49
1311.95:525:49
1412.05:515:48
1512.05:515:48
1612.05:505:48
1712.05:505:48
1812.05:495:48
1912.05:495:48
2012.05:485:47
2112.05:475:47
2212.05:475:47
2312.05:465:47
2412.05:465:47
2512.05:455:46
2612.05:455:46
2712.05:445:46
2812.05:445:46
2912.05:435:46
3012.15:435:46

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.65 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.59 kWh/m² to a high of 6.65 kWh/m² in September across the year — September's 6.65 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.5Intense
26.6Intense
36.6Intense
46.6Intense
56.6Intense
66.6Intense
76.6Intense
86.6Intense
96.6Intense
106.7Intense
116.7Intense
126.7Intense
136.7Intense
146.7Intense
156.7Intense
166.7Intense
176.7Intense
186.7Intense
196.7Intense
206.7Intense
216.7Intense
226.7Intense
236.7Intense
246.7Intense
256.7Intense
266.7Intense
276.6Intense
286.6Intense
296.6Intense
306.6Intense
Planning a trip in September

Hazard calendar for São João dos Patos

In seasonPeak

None of São João dos Patos'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 dos Patos's monsoon runs December–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 dos Patos?

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

3.2
Sightseeing
8th-best month of the year
6.9
Beach & pool
4th-best month of the year

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

What to pack for São João dos Patos in September

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

In September, São João dos Patos sees daytime highs around 35°C and nights near 24°C. Pack light clothes and sun protection.

light clothessun protection

UV index in São João dos Patos 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 dos Patos peaks around March 11 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 24 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 11UV 15Jul 24UV 10
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug10Very high
Sep12Extreme
Oct12Extreme
Nov12Extreme
Dec11Extreme

Air quality in São João dos Patos 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 dos Patos is worst in October — around 26 µg/m³ PM2.5 (moderate), about 6.3× the cleanest month (June, 4 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateOct 1525 µg/m³Jun 184 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb11Good
Mar11Good
Apr10Good
May7Good
Jun4Good
Jul5Good
Aug10Good
Sep17Moderate
Oct26Moderate
Nov14Moderate
Dec13Moderate
Location & terrain

Where is São João dos Patos?

São João dos Patos sits at 6.5°S, 43.7°W, 346 m above sea level, in Brazil. The nearest listed city is Paraibano, 32 km away.

Topography around São João dos Patos

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

Within 3 km, the terrain around São João dos Patos has only modest variations in elevation — a maximum elevation change of 172 m around an average of 347 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 336 m; within 80 km, significant variations in elevation — a maximum elevation change of 407 m.

The land around São João dos Patos is covered by trees (66%) within 3 km, trees (78%) within 16 km, and trees (72%) within 80 km.

3 km
172 m
16 km
336 m
80 km
407 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: Paraibano 32 km · Passagem Franca 36 km · Pastos Bons 43 km · Mirador 74 km · Buriti Bravo 75 km · Colinas 80 km · Barão de Grajaú 80 km · Floriano 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 dos Patos (-6.495°, -43.7022°, elevation 346 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).