Barra Velha weather in September

In September, Barra Velha sees average daytime highs of 21°C and overnight lows near 16°C, with 138 mm of rain across 12.5 wet days and about 11.8 hours of daylight. It is the 9th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 21°C through the month. The sky is clear or mostly clear about 20% of the time in September, and the air most often feels humid.

Daylight stretches from about 11 h 24 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Barra Velha's 11th-clearest and 5th-windiest month. For the whole year in context, see Barra Velha's year-round climate.

Daytime high
21°
9th warmest
Overnight low
16°
4th coldest
Rainfall
138 mm
12.5 wet days
Daylight
11 h 48 min
7:14 AM – 7:04 PM
Cloud cover
71%
11th clearest
Wind
11 km/h
5th windiest
Solar energy
3.6 kWh/m²
Travel score
5.9
out of 10

Barra Velha 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 21°C through the month.

A typical September day in Barra Velha reaches about 21°C in the afternoon and slips back to 16°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 23°C. Set against its neighbours, September runs about 1°C warmer than August and about 2°C cooler than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
12016
22016
32116
42116
52116
62116
72116
82116
92116
102116
112116
122116
132116
142116
152116
162116
172117
182117
192117
202117
212117
222117
232117
242117
252117
262117
272117
282117
292117
302117

Barra Velha weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 23°19321.213.54.8
Feb27° / 23°18018.312.94.9
Mar27° / 22°14019.312.25.3
Apr25° / 20°9811.911.46.5
May22° / 17°10811.510.76.5
Jun20° / 15°1059.710.46.4
Jul19° / 14°919.510.56.3
Aug20° / 15°929.211.16.4
Sep21° / 16°13812.511.85.9
Oct22° / 18°13014.212.65.8
Nov24° / 20°13015.213.35.9
Dec26° / 22°13717.213.65.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 20% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 65%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14555
24555
34357
44258
54060
64060
73961
83763
93664
103664
113565
123565
133466
143565
153466
163367
173367
183367
193367
203367
213268
223268
233268
243169
253169
263070
272971
282971
292971
302872

Chance of precipitation in September

Any precipitation

Barra Velha gets around 138 mm of rain over 12.5 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 41% and peaks near 48% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
132
233
334
434
535
636
737
837
938
1038
1139
1239
1340
1440
1541
1641
1741
1842
1943
2043
2144
2245
2345
2446
2547
2647
2747
2848
2948
3048

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 44% of days. Sticky, muggy-or-worse air turns up on roughly 14% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
122264480
222254490
322254490
4212544100
5212444100
6212444110
7212344110
8212344120
9212344120
10212244130
11202245130
12202245140
13192245140
14192244140
15192244150
16192244150
17192344150
18192343150
19192343150
20192443150
21182443150
22182543150
23172543150
24172543150
25162543160
26162543160
27162443170
28152443170
29152443180
30142443191

Wind in September

Winds average 11 km/h in September.

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
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
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 24 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 48 minutes over September. Sunrise moves from 7:31 AM to 6:57 AM, and sunset from 6:58 PM to 7:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.47:316:58
211.57:306:58
311.57:296:59
411.57:286:59
511.67:277:00
611.67:257:00
711.67:247:01
811.67:237:01
911.77:227:01
1011.77:217:02
1111.77:207:02
1211.77:187:03
1311.87:177:03
1411.87:167:04
1511.87:157:04
1611.87:147:04
1711.97:137:05
1811.97:117:05
1911.97:107:06
2012.07:097:06
2112.07:087:07
2212.07:077:07
2312.07:057:07
2412.17:047:08
2512.17:037:08
2612.17:027:09
2712.17:017:09
2812.27:007:10
2912.26:597:10
3012.26:577:11

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.6 kWh/m².

For context, solar energy here swings from a low near 2.54 kWh/m² to a high of 5.45 kWh/m² in December across the year — September's 3.6 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.6Moderate
23.6Moderate
33.6Moderate
43.6Moderate
53.6Moderate
63.6Moderate
73.6Moderate
83.6Moderate
93.6Moderate
103.6Moderate
113.6Moderate
123.6Moderate
133.6Moderate
143.6Moderate
153.6Moderate
163.6Moderate
173.6Moderate
183.6Moderate
193.6Moderate
203.6Moderate
213.6Moderate
223.6Moderate
233.6Moderate
243.6Moderate
253.6Moderate
263.6Moderate
273.7Moderate
283.7Moderate
293.7Moderate
303.7Moderate
Planning a trip in September

Is September a good time to visit Barra Velha?

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

5.9
Sightseeing
6th-best month of the year
3.5
Beach & pool
10th-best month of the year

September is a reasonable time to visit Barra Velha for sightseeing.

What to pack for Barra Velha in September

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

In September, Barra Velha sees daytime highs around 21°C and nights near 16°C. Worth packing: rain gear. About 13 days see rain.

rain gear

Sea temperature near Barra Velha in September

The nearest coast averages about 19°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in February at about 27°C and coldest in August near 18°C.

It's comfortable for a long swim from Sep 28 to Jun 18 — about 8.7 months when the water holds above 20°C.

20°25°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swimcomfortable to swim
Sea temperature (°C)Comfort
Jan26Warm
Feb27Warm
Mar26Warm
Apr25Warm
May22Refreshing
Jun20Refreshing
Jul19Cool
Aug18Cool
Sep19Cool
Oct21Refreshing
Nov23Refreshing
Dec25Warm

UV index in Barra Velha 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 Barra Velha peaks around January 18 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 at about 5 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighModerateHighVery highExtremeJan 18UV 13Jul 12UV 5
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar11Extreme
Apr8Very high
May5High
Jun5Moderate
Jul5Moderate
Aug6High
Sep8Very high
Oct10Very high
Nov12Extreme
Dec13Extreme
Location & terrain

Where is Barra Velha?

Barra Velha sits at 26.6°S, 48.7°W, 14 m above sea level, in Brazil. The nearest listed city is Balneário Piçarras, 15 km away.

Topography around Barra Velha

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

Within 3 km, the terrain around Barra Velha has only modest variations in elevation — a maximum elevation change of 55 m around an average of 6 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 378 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,522 m.

The land around Barra Velha is covered by water (43%) and artificial surfaces (21%) within 3 km, water (44%) and trees (37%) within 16 km, and trees (54%) and water (33%) within 80 km.

3 km
55 m
16 km
378 m
80 km
1,522 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetlandmangroves
September weather nearby: Balneário Piçarras 15 km · Penha 16 km · Araquari 29 km · Navegantes 30 km · Itajaí 31 km · Massaranduba 32 km · Ilhota 33 km · Guaramirim 36 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 Barra Velha (-26.6322°, -48.6847°, elevation 14 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).