Cachoeira Paulista weather in September

In September, Cachoeira Paulista sees average daytime highs of 26°C and overnight lows near 15°C, with 66 mm of rain across 9.3 wet days and about 11.9 hours of daylight. It is the 8th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 26°C through the month. The sky is clear or mostly clear about 39% of the time in September, and the air most often feels comfortable.

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 Cachoeira Paulista's 5th-clearest and 1st-windiest month. For the whole year in context, see Cachoeira Paulista's year-round climate.

Daytime high
26°
8th warmest
Overnight low
15°
5th coldest
Rainfall
66 mm
9.3 wet days
Daylight
11 h 54 min
6:58 AM – 6:50 PM
Cloud cover
55%
5th clearest
Wind
6 km/h
1st windiest
Solar energy
4.86 kWh/m²
Travel score
6.9
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 26°C through the month.

A typical September day in Cachoeira Paulista reaches about 26°C in the afternoon and slips back to 15°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 31°C. Set against its neighbours, September runs about 1°C warmer than August and about 1°C cooler than October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12514
22514
32514
42514
52514
62614
72614
82614
92614
102615
112615
122615
132615
142615
152615
162615
172615
182615
192615
202615
212615
222615
232615
242615
252615
262615
272615
282616
292616
302616

Cachoeira Paulista weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 19°21821.713.24.5
Feb28° / 19°14417.412.84.6
Mar27° / 18°13517.812.25.3
Apr26° / 17°549.111.56.8
May24° / 14°427.110.97.4
Jun23° / 13°255.110.67.8
Jul23° / 12°294.810.87.9
Aug24° / 13°28511.28.1
Sep26° / 15°669.311.96.9
Oct26° / 17°991412.55.9
Nov26° / 18°14317.413.15.3
Dec27° / 19°18520.113.44.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 39% 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 48%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16535
26535
36436
46337
56238
66139
76040
85941
95842
105644
115545
125545
135446
145446
155347
165248
175149
185050
194852
204852
214753
224654
234555
244456
254357
264357
274258
284159
294060
304060

Chance of precipitation in September

Any precipitation

Cachoeira Paulista gets around 66 mm of rain over 9.3 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 31% and peaks near 41% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
123
223
324
424
524
625
725
825
926
1026
1126
1227
1327
1428
1528
1629
1730
1831
1932
2033
2134
2235
2336
2437
2538
2639
2740
2840
2941
3041

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the comfortable band about 45% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1484390
24743100
34644110
44544110
54345120
64245130
74145140
84046150
93846160
103746170
113547180
123447190
133247210
143148220
152948230
162848240
172748250
182648260
192547270
202447291
212346301
222245311
232245321
242144332
252043342
262043353
271942363
281841373
291840384
301839394

Wind in September

Winds average 6 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 6 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

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 7:14 AM to 6:44 AM, and sunset from 6:46 PM to 6:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.57:146:46
211.67:136:46
311.67:126:47
411.67:116:47
511.67:106:47
611.67:096:47
711.77:086:48
811.77:076:48
911.77:056:48
1011.77:046:49
1111.87:036:49
1211.87:026:49
1311.87:016:50
1411.87:006:50
1511.86:596:50
1611.96:586:50
1711.96:576:51
1811.96:566:51
1911.96:556:51
2012.06:546:52
2112.06:536:52
2212.06:526:52
2312.06:516:53
2412.16:506:53
2512.16:496:53
2612.16:486:54
2712.16:476:54
2812.16:466:54
2912.26:456:55
3012.26:446:55

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.86 kWh/m².

For context, solar energy here swings from a low near 3.54 kWh/m² to a high of 5.61 kWh/m² in February across the year — September's 4.86 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
34.9Bright
44.9Bright
54.9Bright
64.9Bright
74.9Bright
84.9Bright
94.9Bright
104.9Bright
114.9Bright
124.9Bright
134.9Bright
144.9Bright
154.9Bright
164.9Bright
174.9Bright
184.9Bright
194.9Bright
204.9Bright
214.9Bright
224.9Bright
234.9Bright
244.9Bright
254.9Bright
264.9Bright
274.9Bright
284.9Bright
294.9Bright
304.9Bright
Planning a trip in September

Hazard calendar for Cachoeira Paulista

In seasonPeak

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

Cachoeira Paulista's rainy season runs October–March, when most of the year's rain falls.

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

Is September a good time to visit Cachoeira Paulista?

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

6.9
Sightseeing
5th-best month of the year
6.5
Beach & pool
3rd-best month of the year

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

What to pack for Cachoeira Paulista in September

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

In September, Cachoeira Paulista sees daytime highs around 26°C and nights near 15°C. Worth packing: light clothes, rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

Sea temperature near Cachoeira Paulista in September

The nearest coast averages about 22°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 65 km away) is warmest in February at about 27°C and coldest in August near 21°C.

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

20°22°24°26°28°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb27Warm
Mar27Warm
Apr26Warm
May24Warm
Jun23Refreshing
Jul22Refreshing
Aug21Refreshing
Sep22Refreshing
Oct23Refreshing
Nov23Refreshing
Dec25Warm

UV index in Cachoeira Paulista in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Cachoeira Paulista peaks around January 24 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 24UV 15Jul 11UV 6
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr10Very high
May7High
Jun6High
Jul6High
Aug8Very high
Sep7Very high
Oct12Extreme
Nov14Extreme
Dec15Extreme

Air quality in Cachoeira Paulista 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 Cachoeira Paulista is worst in September — around 19 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (December, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1518 µg/m³Dec 209 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb10Good
Mar10Good
Apr11Good
May13Moderate
Jun13Moderate
Jul13Moderate
Aug14Moderate
Sep19Moderate
Oct13Moderate
Nov10Good
Dec9Good
Location & terrain

Where is Cachoeira Paulista?

Cachoeira Paulista sits at 22.7°S, 45.0°W, 526 m above sea level, in Brazil. The nearest listed city is Cruzeiro, 11 km away.

Topography around Cachoeira Paulista

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

Within 3 km, the terrain around Cachoeira Paulista has only modest variations in elevation — a maximum elevation change of 149 m around an average of 549 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 699 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,761 m.

The land around Cachoeira Paulista is covered by grassland (50%) and trees (24%) within 3 km, grassland (56%) and trees (34%) within 16 km, and trees (52%) and grassland (40%) within 80 km.

3 km
149 m
16 km
699 m
80 km
2,761 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Cruzeiro 11 km · Lorena 14 km · Guaratinguetá 25 km · Aparecida 30 km · Passa Quatro 31 km · Potim 32 km · Itanhandu 42 km · Cunha 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 Cachoeira Paulista (-22.665°, -45.0094°, elevation 526 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. 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).