Água Branca weather in September

In September, Água Branca sees average daytime highs of 35°C and overnight lows near 25°C, with 4 mm of rain across 0.9 wet days and about 12 hours of daylight. It is the 2nd-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 35°C through the month. The sky is clear or mostly clear about 72% of the time in September, and the air most often feels humid.

Daylight stretches from about 11 h 54 min at the start of September to 12 hours by month's end. Set against the rest of the year, September is Água Branca's 2nd-clearest and 4th-windiest month. For the whole year in context, see Água Branca's year-round climate.

Daytime high
35°
2nd warmest
Overnight low
25°
11th coldest
Rainfall
4 mm
0.9 wet days
Daylight
12 hours
5:46 AM – 5:44 PM
Cloud cover
31%
2nd clearest
Wind
10 km/h
4th windiest
Solar energy
6.63 kWh/m²
Travel score
3.0
out of 10

Água Branca 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 35°C through the month.

A typical September day in Água Branca reaches about 35°C in the afternoon and slips back to 25°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 34°C and 37°C. Set against its neighbours, September runs about 1°C warmer than August and on par with October.

20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13524
23524
33524
43525
53525
63525
73525
83525
93525
103525
113525
123525
133525
143525
153525
163625
173625
183625
193625
203625
213625
223625
233625
243625
253625
263625
273625
283625
293625
303625

How September really feels in Água Branca

Once humidity and wind are folded in, September averages 30 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
30
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Água Branca weather by month

How September compares with the rest of the year at a glance. September is the 2nd-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 23°24324.112.32.9
Feb31° / 23°24022.512.23.0
Mar31° / 23°27526.5122.8
Apr31° / 23°18421.111.93.3
May32° / 23°759.811.74.2
Jun32° / 23°8211.74.7
Jul33° / 23°60.911.74.6
Aug34° / 24°10.211.83.9
Sep35° / 25°40.9123.0
Oct36° / 25°25312.12.6
Nov34° / 25°728.612.32.9
Dec33° / 24°10614.212.33.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 72% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 10%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
19010
28911
38911
48911
58911
68911
78911
88911
99010
109010
119010
129010
139010
14919
15919
16919
17919
18919
19919
20919
21928
22919
23919
249010
259010
269010
278911
288911
298812
308713

Chance of precipitation in September

Any precipitation

Água Branca gets around 4 mm of rain over 0.9 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 3% and peaks near 6% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
11
21
31
41
52
62
72
82
92
102
112
122
132
142
152
162
172
183
193
203
213
224
234
244
254
265
275
285
296
306

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the humid band about 46% of days. Sticky, muggy-or-worse air turns up on roughly 20% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
133746131
233746131
333746131
433746131
533746121
633747121
733747121
833747121
933747121
1023747121
1123747121
1223747131
1323647131
1423647141
1513547151
1613547161
1713447172
1813346182
1913246192
2013146202
2113046222
2212846233
2312746243
2412546253
2512446263
2612346274
2712245284
2812145294
2912045304
3011944315

Wind in September

Winds average 10 km/h in September.

Across September, daily wind ranges from about 9 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
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 54 min at the start of September to 12 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over September. Sunrise moves from 5:54 AM to 5:38 AM, and sunset from 5:47 PM to 5:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.95:545:47
211.95:535:47
311.95:535:46
411.95:525:46
511.95:525:46
611.95:515:46
711.95:515:46
811.95:505:46
911.95:505:45
1011.95:495:45
1111.95:495:45
1211.95:485:45
1312.05:475:45
1412.05:475:44
1512.05:465:44
1612.05:465:44
1712.05:455:44
1812.05:455:43
1912.05:445:43
2012.05:445:43
2112.05:435:43
2212.05:435:43
2312.05:425:42
2412.05:425:42
2512.05:415:42
2612.05:415:42
2712.05:405:42
2812.05:395:42
2912.05:395:41
3012.05:385:41

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.63 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.79 kWh/m² to a high of 6.63 kWh/m² in September across the year — September's 6.63 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.5Intense
26.5Intense
36.5Intense
46.5Intense
56.5Intense
66.5Intense
76.6Intense
86.6Intense
96.6Intense
106.6Intense
116.6Intense
126.6Intense
136.6Intense
146.6Intense
156.7Intense
166.7Intense
176.7Intense
186.7Intense
196.7Intense
206.7Intense
216.7Intense
226.7Intense
236.7Intense
246.7Intense
256.7Intense
266.7Intense
276.7Intense
286.7Intense
296.7Intense
306.7Intense
Planning a trip in September

Hazard calendar for Água Branca

In seasonPeak

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

Água Branca's monsoon runs January–April, 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 Água Branca?

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

3.0
Sightseeing
7th-best month of the year
6.6
Beach & pool
4th-best month of the year

September is a weaker month for outdoor sightseeing in Água Branca. The water and warmth also suit a beach or pool day.

What to pack for Água Branca in September

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

In September, Água Branca sees daytime highs around 35°C and nights near 25°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Água Branca in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Água Branca peaks around March 13 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 24 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeMar 13UV 15Jul 24UV 10
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug10Very high
Sep12Extreme
Oct12Extreme
Nov12Extreme
Dec11Extreme

Air quality in Água Branca 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 Água Branca is worst in October — around 42 µg/m³ PM2.5 (poor), about 9.7× the cleanest month (July, 4 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateModerateOct 1639 µg/m³Jul 104 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb13Moderate
Mar12Moderate
Apr11Good
May9Good
Jun5Good
Jul4Good
Aug11Good
Sep22Moderate
Oct42Poor
Nov18Moderate
Dec14Moderate
Location & terrain

Where is Água Branca?

Água Branca sits at 5.9°S, 42.6°W, 247 m above sea level, in Brazil. The nearest listed city is Regeneração, 38 km away.

Topography around Água Branca

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

Within 3 km, the terrain around Água Branca has only modest variations in elevation — a maximum elevation change of 61 m around an average of 237 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 280 m; within 80 km, significant variations in elevation — a maximum elevation change of 391 m.

The land around Água Branca is covered by grassland (40%), trees (24%) and shrubs (21%) within 3 km, trees (47%) and grassland (32%) within 16 km, and trees (59%) and shrubs (26%) within 80 km.

3 km
61 m
16 km
280 m
80 km
391 m
treesshrubsgrasslandcroplandartificial surfaces
September weather nearby: Regeneração 38 km · Amarante 45 km · Parnarama 56 km · Demerval Lobão 60 km · Matões 75 km · Teresina 91 km · Timon 91 km · Altos 97 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 Água Branca (-5.8922°, -42.6361°, elevation 247 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).