Aguaí weather in September

In September, Aguaí sees average daytime highs of 29°C and overnight lows near 17°C, with 65 mm of rain across 7.6 wet days and about 11.9 hours of daylight. It is the 5th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 53% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 36 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Aguaí's 4th-clearest and 1st-windiest month. For the whole year in context, see Aguaí's year-round climate.

Daytime high
29°
5th warmest
Overnight low
17°
5th coldest
Rainfall
65 mm
7.6 wet days
Daylight
11 h 54 min
7:06 AM – 6:58 PM
Cloud cover
44%
4th clearest
Wind
9 km/h
1st windiest
Solar energy
5.59 kWh/m²
Travel score
6.0
out of 10

Aguaí is settlement in São Paulo federated state, 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 29°C through the month.

A typical September day in Aguaí reaches about 29°C in the afternoon and slips back to 17°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 24°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)
12916
22916
32916
42916
52916
62916
72916
82916
92916
102916
112917
122917
132917
142917
152917
162917
172917
182917
192917
202917
212917
222917
232917
242917
252917
262917
272917
282917
292917
302918

Aguaí weather by month

How September compares with the rest of the year at a glance. September is the 5th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 20°23421.913.23.8
Feb29° / 20°16718.212.84.0
Mar29° / 19°14517.812.24.5
Apr28° / 17°648.711.56.3
May26° / 15°506117.6
Jun25° / 13°293.610.78.2
Jul25° / 13°25310.88.3
Aug27° / 14°223.411.27.8
Sep29° / 17°657.611.96.0
Oct30° / 19°10413.112.54.8
Nov29° / 19°15816.913.14.5
Dec29° / 20°19521.113.34.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 53% 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 34%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17822
27822
37723
47624
57624
67525
77426
87327
97327
107228
117030
126931
136931
146832
156634
166535
176535
186436
196337
206238
216139
226139
236040
245941
255842
265743
275743
285644
295545
305545

Chance of precipitation in September

Any precipitation

Aguaí gets around 65 mm of rain over 7.6 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 25% and peaks near 34% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
117
218
318
419
519
620
720
821
921
1022
1122
1222
1323
1423
1524
1624
1725
1826
1927
2028
2129
2229
2330
2431
2532
2632
2733
2833
2934
3034

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 44% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
16425110
26325120
36126130
46126130
55927140
65827150
75628151
85429161
95230171
105230171
115031181
124832191
134733191
144533202
154434202
164334212
174234222
184035223
193935233
203834243
213734264
223534274
233433285
243333295
253232306
263131317
273031328
282930338
292730349
3026293510

Wind in September

Winds average 9 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
298calm
308calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 36 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 36 minutes over September. Sunrise moves from 7:21 AM to 6:52 AM, and sunset from 6:54 PM to 7:03 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.67:216:54
211.67:206:55
311.67:196:55
411.67:186:55
511.67:176:55
611.77:166:56
711.77:156:56
811.77:146:56
911.77:136:57
1011.77:126:57
1111.87:116:57
1211.87:106:57
1311.87:096:58
1411.87:086:58
1511.97:076:58
1611.97:066:58
1711.97:056:59
1811.97:046:59
1911.97:036:59
2012.07:027:00
2112.07:017:00
2212.07:007:00
2312.06:597:00
2412.06:587:01
2512.16:577:01
2612.16:567:01
2712.16:557:02
2812.16:547:02
2912.26:537:02
3012.26:527:03

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.59 kWh/m².

For context, solar energy here swings from a low near 3.85 kWh/m² to a high of 5.97 kWh/m² in November across the year — September's 5.59 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.4Bright
25.4Bright
35.5Bright
45.5Bright
55.5Bright
65.5Bright
75.5Bright
85.5Bright
95.5Bright
105.5Bright
115.5Bright
125.6Bright
135.6Bright
145.6Bright
155.6Bright
165.6Bright
175.6Bright
185.6Bright
195.6Bright
205.6Bright
215.6Bright
225.7Bright
235.7Bright
245.7Bright
255.7Bright
265.7Bright
275.7Bright
285.7Bright
295.7Bright
305.7Bright
Planning a trip in September

Hazard calendar for Aguaí

In seasonPeak

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

Aguaí's rainy season runs November–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 Aguaí?

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

6.0
Sightseeing
6th-best month of the year
7.6
Beach & pool
3rd-best month of the year

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

What to pack for Aguaí in September

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

In September, Aguaí sees daytime highs around 29°C and nights near 17°C. Pack light clothes. Worth having: sun protection. About 8 days see rain.

light clothessun protection

UV index in Aguaí in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Aguaí peaks around January 21 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 10 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 21UV 15Jul 10UV 6
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr10Very high
May7Very high
Jun6High
Jul6High
Aug8Very high
Sep8Very high
Oct12Extreme
Nov14Extreme
Dec14Extreme

Air quality in Aguaí 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 Aguaí is worst in September — around 32 µg/m³ PM2.5 (moderate), about 3.2× the cleanest month (November, 10 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1430 µg/m³Nov 2310 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb12Good
Mar12Good
Apr13Moderate
May15Moderate
Jun15Moderate
Jul16Moderate
Aug23Moderate
Sep32Moderate
Oct16Moderate
Nov10Good
Dec10Good
Location & terrain

Where is Aguaí?

Aguaí sits at 22.1°S, 47.0°W, 665 m above sea level, in Brazil. The nearest listed city is São João da Boa Vista, 21 km away.

Topography around Aguaí

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

Within 3 km, the terrain around Aguaí has only modest variations in elevation — a maximum elevation change of 94 m around an average of 667 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 339 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,292 m.

The land around Aguaí is covered by cropland (36%), trees (28%) and artificial surfaces (21%) within 3 km, cropland (47%) and trees (41%) within 16 km, and trees (36%), cropland (33%) and grassland (27%) within 80 km.

3 km
94 m
16 km
339 m
80 km
1,292 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: São João da Boa Vista 21 km · Vargem Grande do Sul 27 km · Espírito Santo do Pinhal 28 km · Casa Branca 34 km · Mogi Guaçu 34 km · Conchal 36 km · Santa Cruz das Palmeiras 38 km · Mogi Mirim 41 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 Aguaí (-22.0594°, -46.9786°, elevation 665 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).