Brotas weather in September

In September, Brotas sees average daytime highs of 28°C and overnight lows near 16°C, with 63 mm of rain across 7.8 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 52% 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 Brotas's 4th-clearest and 1st-windiest month. For the whole year in context, see Brotas's year-round climate.

Daytime high
28°
7th warmest
Overnight low
16°
5th coldest
Rainfall
63 mm
7.8 wet days
Daylight
11 h 54 min
7:11 AM – 7:03 PM
Cloud cover
44%
4th clearest
Wind
11 km/h
1st windiest
Solar energy
5.52 kWh/m²
Travel score
6.2
out of 10

Brotas 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 Brotas reaches about 28°C in the afternoon and slips back to 16°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 23°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)
12815
22815
32816
42816
52816
62916
72916
82916
92916
102916
112916
122916
132916
142916
152916
162916
172917
182917
192917
202817
212817
222817
232817
242817
252817
262817
272817
282817
292817
302917

Brotas 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°2562313.23.8
Feb29° / 20°19219.712.83.9
Mar29° / 20°1521912.24.5
Apr28° / 18°608.611.56.5
May25° / 15°556.310.97.6
Jun25° / 14°374.110.78.2
Jul25° / 13°273.610.88.3
Aug27° / 14°293.711.27.9
Sep28° / 16°637.811.96.2
Oct29° / 18°11213.212.55.0
Nov29° / 19°16016.413.14.6
Dec29° / 20°20221.413.34.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 52% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 12% of September, with mostly cloudy or overcast conditions the remaining 36%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17723
27624
37525
47525
57327
67228
77129
87030
96931
106931
116733
126733
136634
146535
156535
166436
176337
186238
196238
206139
215941
225842
235743
245644
255545
265347
275347
285248
295248
305149

Chance of precipitation in September

Any precipitation

Brotas gets around 63 mm of rain over 7.8 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 26% and peaks near 37% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
116
217
317
418
518
619
719
820
920
1021
1122
1222
1323
1424
1524
1625
1726
1827
1928
2029
2130
2232
2333
2433
2534
2635
2736
2836
2937
3037

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 40% of days. Sticky, muggy-or-worse air turns up on roughly 5% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
16027121
25927131
35827141
45728141
55628151
65329162
75329162
85130172
94931182
104831192
114632203
124433203
134233213
144134223
153935224
163835234
173636244
183536245
193436255
203336266
213135276
223035287
232934298
242834299
2527333010
2626333111
2725323212
2824323212
2923313313
3022303414

Wind in September

Winds average 11 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 10 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
110calm
210calm
310calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

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 7:26 AM to 6:56 AM, and sunset from 6:59 PM to 7:07 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.57:266:59
211.67:256:59
311.67:246:59
411.67:237:00
511.67:227:00
611.77:217:00
711.77:207:00
811.77:197:01
911.77:187:01
1011.77:177:01
1111.87:167:02
1211.87:157:02
1311.87:147:02
1411.87:137:02
1511.97:127:03
1611.97:117:03
1711.97:107:03
1811.97:097:04
1911.97:087:04
2012.07:077:04
2112.07:057:04
2212.07:047:05
2312.07:037:05
2412.07:027:05
2512.17:017:06
2612.17:007:06
2712.16:597:06
2812.16:587:07
2912.26:577:07
3012.26:567:07

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.52 kWh/m².

For context, solar energy here swings from a low near 3.72 kWh/m² to a high of 5.99 kWh/m² in November across the year — September's 5.52 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.4Bright
55.4Bright
65.4Bright
75.4Bright
85.4Bright
95.4Bright
105.5Bright
115.5Bright
125.5Bright
135.5Bright
145.5Bright
155.5Bright
165.5Bright
175.5Bright
185.6Bright
195.6Bright
205.6Bright
215.6Bright
225.6Bright
235.6Bright
245.6Bright
255.6Bright
265.6Bright
275.6Bright
285.7Bright
295.7Bright
305.7Bright
Planning a trip in September

Hazard calendar for Brotas

In seasonPeak

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

Brotas'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 Brotas?

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

6.2
Sightseeing
6th-best month of the year
7.5
Beach & pool
2nd-best month of the year

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

What to pack for Brotas in September

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

In September, Brotas sees daytime highs around 28°C and nights near 16°C. Pack light clothes. Worth having: sun protection. About 8 days see rain.

light clothessun protection

UV index in Brotas 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 Brotas 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 Brotas 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 Brotas 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 Brotas?

Brotas sits at 22.3°S, 48.1°W, 651 m above sea level, in Brazil. The nearest listed city is Dois Córregos, 28 km away.

Topography around Brotas

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

Within 3 km, the terrain around Brotas has only modest variations in elevation — a maximum elevation change of 153 m around an average of 653 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 426 m; within 80 km, large variations in elevation — a maximum elevation change of 679 m.

The land around Brotas is covered by cropland (37%) and trees (26%) within 3 km, cropland (45%) and trees (41%) within 16 km, and cropland (50%) and trees (30%) within 80 km.

3 km
153 m
16 km
426 m
80 km
679 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Dois Córregos 28 km · Itirapina 31 km · São Pedro 37 km · São Carlos 38 km · Ibaté 39 km · Charqueada 44 km · Jaú 44 km · Barra Bonita 50 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 Brotas (-22.2842°, -48.1267°, elevation 651 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).