São Pedro weather in September

In September, São Pedro sees average daytime highs of 28°C and overnight lows near 16°C, with 69 mm of rain across 8.5 wet days and about 11.9 hours of daylight. It is the 7th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 48% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 30 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is São Pedro's 4th-clearest and 1st-windiest month. For the whole year in context, see São Pedro's year-round climate.

Daytime high
28°
7th warmest
Overnight low
16°
5th coldest
Rainfall
69 mm
8.5 wet days
Daylight
11 h 54 min
7:10 AM – 7:02 PM
Cloud cover
46%
4th clearest
Wind
10 km/h
1st windiest
Solar energy
5.42 kWh/m²
Travel score
6.3
out of 10

São Pedro 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 28°C through the month.

A typical September day in São Pedro reaches about 28°C in the afternoon and slips back to 16°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 34°C. Set against its neighbours, September runs about 2°C warmer than August and on par with October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12814
22815
32815
42815
52815
62815
72815
82815
92815
102815
112815
122815
132816
142816
152816
162816
172816
182816
192816
202816
212816
222816
232816
242816
252816
262816
272816
282816
292816
302816

São Pedro weather by month

How September compares with the rest of the year at a glance. September is the 7th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 20°28823.713.23.7
Feb29° / 20°22820.512.83.8
Mar29° / 20°18319.412.24.5
Apr28° / 18°69911.56.4
May25° / 15°566.510.97.5
Jun25° / 13°404.810.68.0
Jul25° / 13°323.910.88.2
Aug27° / 13°324.111.27.9
Sep28° / 16°698.511.96.3
Oct29° / 18°12713.612.55.0
Nov29° / 19°17616.413.14.7
Dec29° / 20°21621.813.44.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 48% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 38%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17525
27327
37228
47228
57129
67030
76931
86931
96832
106733
116535
126535
136436
146337
156337
166238
176139
186139
196040
205842
215743
225743
235545
245446
255347
265248
275050
284951
294951
304852

Chance of precipitation in September

Any precipitation

São Pedro gets around 69 mm of rain over 8.5 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 28% and peaks near 39% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
118
219
319
420
521
621
722
822
923
1024
1124
1225
1325
1426
1526
1627
1728
1829
1930
2031
2132
2233
2334
2435
2536
2637
2737
2838
2938
3039

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 38% of days. Sticky, muggy-or-worse air turns up on roughly 6% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
15729131
25629141
35629141
45529151
55329162
65229172
75229172
85030182
94830192
104731202
114532213
124333213
134133223
143934233
153835244
163635244
173536254
183336265
193236275
203036276
212936287
222835298
232735309
2426343010
2525333111
2624333212
2723323213
2822313314
2921303315
3021303416

Wind in September

Winds average 10 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 30 min at the start of September to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 42 minutes over September. Sunrise moves from 7:25 AM to 6:55 AM, and sunset from 6:58 PM to 7:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.57:256:58
211.67:246:58
311.67:236:58
411.67:226:59
511.67:216:59
611.77:206:59
711.77:196:59
811.77:187:00
911.77:177:00
1011.77:167:00
1111.87:157:01
1211.87:147:01
1311.87:137:01
1411.87:127:02
1511.87:117:02
1611.97:107:02
1711.97:097:02
1811.97:087:03
1911.97:077:03
2012.07:067:03
2112.07:057:04
2212.07:047:04
2312.07:037:04
2412.17:027:05
2512.17:017:05
2612.16:597:05
2712.16:587:05
2812.16:577:06
2912.26:567:06
3012.26:557:06

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.42 kWh/m².

For context, solar energy here swings from a low near 3.65 kWh/m² to a high of 6 kWh/m² in November across the year — September's 5.42 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.2Bright
25.3Bright
35.3Bright
45.3Bright
55.3Bright
65.3Bright
75.3Bright
85.3Bright
95.4Bright
105.4Bright
115.4Bright
125.4Bright
135.4Bright
145.4Bright
155.4Bright
165.4Bright
175.5Bright
185.5Bright
195.5Bright
205.5Bright
215.5Bright
225.5Bright
235.5Bright
245.5Bright
255.5Bright
265.5Bright
275.5Bright
285.5Bright
295.5Bright
305.6Bright
Planning a trip in September

Hazard calendar for São Pedro

In seasonPeak

None of São Pedro'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 Pedro's monsoon runs November–March, 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 Pedro?

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

6.3
Sightseeing
6th-best month of the year
7.3
Beach & pool
2nd-best month of the year

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

What to pack for São Pedro in September

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

In September, São Pedro sees daytime highs around 28°C and nights near 16°C. Pack light clothes. Worth having: rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

UV index in São Pedro in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 9 (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 Pedro peaks around January 20 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 11 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 20UV 15Jul 11UV 6
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar12Extreme
Apr10Very high
May7High
Jun6High
Jul6High
Aug8Very high
Sep9Very high
Oct11Extreme
Nov13Extreme
Dec14Extreme

Air quality in São Pedro 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 Pedro is worst in September — around 25 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (December, 11 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1125 µg/m³Dec 1211 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb12Good
Mar12Moderate
Apr14Moderate
May16Moderate
Jun17Moderate
Jul18Moderate
Aug24Moderate
Sep25Moderate
Oct18Moderate
Nov11Good
Dec11Good
Location & terrain

Where is São Pedro?

São Pedro sits at 22.5°S, 47.9°W, 566 m above sea level, in Brazil. The nearest listed city is Charqueada, 15 km away.

Topography around São Pedro

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

Within 3 km, the terrain around São Pedro has significant variations in elevation — a maximum elevation change of 357 m around an average of 579 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 636 m; within 80 km, large variations in elevation — a maximum elevation change of 659 m.

The land around São Pedro is covered by trees (35%), grassland (34%) and artificial surfaces (24%) within 3 km, trees (37%), grassland (32%) and cropland (29%) within 16 km, and cropland (45%) and trees (30%) within 80 km.

3 km
357 m
16 km
636 m
80 km
659 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Charqueada 15 km · Piracicaba 34 km · Itirapina 34 km · Brotas 37 km · Rio Claro 39 km · Santa Gertrudes 41 km · Iracemápolis 41 km · Rio das Pedras 46 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 Pedro (-22.5486°, -47.9139°, elevation 566 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).