Apiaí weather in September

In September, Apiaí sees average daytime highs of 23°C and overnight lows near 13°C, with 114 mm of rain across 11.7 wet days and about 11.8 hours of daylight. It is the 8th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 23°C through the month. The sky is clear or mostly clear about 25% 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 Apiaí's 6th-clearest and 3rd-windiest month. For the whole year in context, see Apiaí's year-round climate.

Daytime high
23°
8th warmest
Overnight low
13°
5th coldest
Rainfall
114 mm
11.7 wet days
Daylight
11 h 54 min
7:14 AM – 7:05 PM
Cloud cover
69%
6th clearest
Wind
7 km/h
3rd windiest
Solar energy
4.25 kWh/m²
Travel score
6.4
out of 10

Apiaí 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 23°C through the month.

A typical September day in Apiaí reaches about 23°C in the afternoon and slips back to 13°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 30°C. Set against its neighbours, September runs about 1°C warmer than August and about 1°C cooler than October.

10°20°30°151015202530
Avg high (°C)Avg low (°C)
12312
22413
32413
42413
52413
62413
72413
82413
92413
102413
112413
122413
132413
142413
152413
162314
172314
182314
192314
202314
212314
222314
232314
242314
252314
262314
272314
282314
292314
302414

Apiaí 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°25024.713.34.2
Feb28° / 19°19921.512.94.2
Mar27° / 18°15520.612.24.9
Apr25° / 16°7511.311.46.4
May22° / 13°821010.86.6
Jun21° / 12°80810.56.8
Jul21° / 11°777.510.66.9
Aug22° / 12°577.311.17.2
Sep23° / 13°11411.711.86.4
Oct25° / 15°12616.112.65.6
Nov26° / 17°13217.413.25.3
Dec27° / 18°18120.613.54.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 25% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 11% of September, with mostly cloudy or overcast conditions the remaining 64%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15050
24951
34951
44654
54555
64456
74357
84258
94060
103961
113862
123763
133763
143664
153664
163565
173466
183466
193268
203268
213169
223070
232971
242971
252773
262773
272674
282575
292575
302575

Chance of precipitation in September

Any precipitation

Apiaí gets around 114 mm of rain over 11.7 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 39% and peaks near 50% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
129
229
330
431
531
632
732
833
933
1034
1134
1235
1335
1436
1537
1638
1739
1840
1941
2042
2143
2244
2345
2446
2547
2647
2748
2849
2949
3050

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 43% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
13048211
22948221
32947231
42847241
52846251
62846261
72745261
82745272
92645272
102645282
112545282
122445292
132345292
142345302
152245303
162145313
172145313
182144323
192044324
202043334
212043334
221942345
231941355
241840366
251840376
261739377
271738387
281737398
291636399
301635409

Wind in September

Winds average 7 km/h in September.

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

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

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 7:30 AM to 6:59 AM, and sunset from 7:00 PM to 7:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.57:307:00
211.57:297:00
311.57:287:01
411.67:277:01
511.67:267:01
611.67:257:02
711.67:247:02
811.77:237:03
911.77:227:03
1011.77:217:03
1111.77:197:04
1211.87:187:04
1311.87:177:04
1411.87:167:05
1511.87:157:05
1611.97:147:05
1711.97:137:06
1811.97:127:06
1911.97:117:07
2012.07:097:07
2112.07:087:07
2212.07:077:08
2312.07:067:08
2412.17:057:08
2512.17:047:09
2612.17:037:09
2712.17:027:10
2812.27:017:10
2912.27:007:10
3012.26:597:11

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.25 kWh/m².

For context, solar energy here swings from a low near 2.95 kWh/m² to a high of 5.44 kWh/m² in December across the year — September's 4.25 kWh/m² falls in the middle.

012345151015202530
Solar energy (kWh/m²)Level
14.3Bright
24.3Bright
34.3Bright
44.3Bright
54.3Bright
64.3Bright
74.3Bright
84.3Bright
94.3Bright
104.3Bright
114.3Bright
124.3Bright
134.3Bright
144.3Bright
154.3Bright
164.3Bright
174.3Bright
184.3Bright
194.3Bright
204.3Bright
214.3Bright
224.3Bright
234.3Bright
244.3Bright
254.3Bright
264.3Bright
274.3Bright
284.3Bright
294.3Bright
304.3Bright
Planning a trip in September

Hazard calendar for Apiaí

In seasonPeak

In September, Apiaí sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Apiaí's rainy season runs September–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 Apiaí?

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

6.4
Sightseeing
5th-best month of the year
5.3
Beach & pool
2nd-best month of the year

September is a reasonable time to visit Apiaí for sightseeing.

What to pack for Apiaí in September

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

In September, Apiaí sees daytime highs around 23°C and nights near 13°C. Worth packing: light clothes and rain gear. About 12 days see rain.

light clothesrain gear

UV index in Apiaí in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Apiaí peaks around January 19 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 11 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 19UV 15Jul 11UV 5
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar12Extreme
Apr9Very high
May7High
Jun6High
Jul5High
Aug7Very high
Sep8Very high
Oct11Extreme
Nov13Extreme
Dec14Extreme

Air quality in Apiaí 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 Apiaí is worst in September — around 15 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (March, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1215 µg/m³Mar 128 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb8Good
Mar8Good
Apr9Good
May11Good
Jun11Good
Jul12Good
Aug14Moderate
Sep15Moderate
Oct11Good
Nov9Good
Dec9Good
Location & terrain

Where is Apiaí?

Apiaí sits at 24.5°S, 48.8°W, 925 m above sea level, in Brazil. The nearest listed city is Ribeirão Branco, 33 km away.

Topography around Apiaí

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

Within 3 km, the terrain around Apiaí has significant variations in elevation — a maximum elevation change of 437 m around an average of 941 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,066 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,809 m.

The land around Apiaí is covered by trees (82%) within 3 km, trees (84%) within 16 km, and trees (82%) within 80 km.

3 km
437 m
16 km
1,066 m
80 km
1,809 m
treesgrasslandcroplandartificial surfaces
September weather nearby: Ribeirão Branco 33 km · Guapiara 48 km · Cerro Azul 55 km · Itapeva 59 km · Itararé 66 km · Capão Bonito 75 km · Sengés 77 km · Cajati 77 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 Apiaí (-24.5094°, -48.8425°, elevation 925 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).