Barra de Santo Antônio weather in September

In September, Barra de Santo Antônio sees average daytime highs of 25°C and overnight lows near 24°C, with 65 mm of rain across 18.3 wet days and about 11.9 hours of daylight. It is the 10th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 25°C through the month. The sky is clear or mostly clear about 70% of the time in September, and the air most often feels muggy.

Daylight stretches from about 11 h 48 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Barra de Santo Antônio's 1st-clearest and 4th-windiest month. For the whole year in context, see Barra de Santo Antônio's year-round climate.

Daytime high
25°
10th warmest
Overnight low
24°
3rd coldest
Rainfall
65 mm
18.3 wet days
Daylight
11 h 54 min
5:18 AM – 5:15 PM
Cloud cover
35%
1st clearest
Wind
20 km/h
4th windiest
Solar energy
5.71 kWh/m²
Travel score
5.9
out of 10

Barra de Santo Antônio 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 25°C through the month.

A typical September day in Barra de Santo Antônio reaches about 25°C in the afternoon and slips back to 24°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 26°C. Set against its neighbours, September runs on par with August and on par with October.

20°23°25°28°30°151015202530
Avg high (°C)Avg low (°C)
12524
22524
32524
42524
52524
62524
72524
82524
92524
102524
112524
122524
132524
142524
152524
162524
172524
182524
192524
202524
212524
222524
232624
242624
252624
262624
272624
282624
292624
302624

Barra de Santo Antônio weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 25°6517.212.55.7
Feb27° / 26°6816.212.35.5
Mar27° / 26°9019.712.15.3
Apr27° / 26°12821.411.84.9
May27° / 25°17724.111.64.7
Jun26° / 24°18624.411.54.7
Jul25° / 24°1702511.54.8
Aug25° / 24°10222.411.75.3
Sep25° / 24°6518.311.95.9
Oct26° / 25°5116.512.26.2
Nov26° / 25°371312.46.4
Dec27° / 25°3512.612.56.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 70% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 20% of September, with mostly cloudy or overcast conditions the remaining 10%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18713
28713
38713
48713
58713
68713
78713
88713
98713
108812
118911
128911
138911
149010
159010
169010
17919
18928
19928
20937
21937
22937
23937
24937
25937
26937
27937
28937
29937
30928

Chance of precipitation in September

Any precipitation

Barra de Santo Antônio gets around 65 mm of rain over 18.3 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 61% and peaks near 68% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
168
267
367
467
567
666
766
866
966
1065
1165
1264
1364
1463
1563
1662
1761
1860
1959
2058
2157
2256
2356
2455
2554
2653
2753
2852
2952
3052

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 67% of days. Sticky, muggy-or-worse air turns up on roughly 97% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)
157322
257223
357223
457124
557124
657025
757025
856926
956926
1056926
1146927
1246927
1346927
1446927
1536928
1636928
1736928
1836829
1936730
2026830
2126731
2226632
2326533
2426434
2526335
2626236
2726137
2826038
2925840
3025741

Wind in September

Winds average 20 km/h in September.

Across September, daily wind ranges from about 19 km/h on the calmest days to 20 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
120light breeze
220light breeze
320light breeze
420light breeze
520light breeze
620light breeze
720light breeze
820light breeze
920light breeze
1020light breeze
1120light breeze
1220light breeze
1320light breeze
1420light breeze
1520light breeze
1620light breeze
1720light breeze
1820light breeze
1919light breeze
2019light breeze
2119light breeze
2219light breeze
2319light breeze
2419light breeze
2519light breeze
2619light breeze
2719light breeze
2819light breeze
2919light breeze
3019light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 48 min at the start of September to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 18 minutes over September. Sunrise moves from 5:27 AM to 5:09 AM, and sunset from 5:16 PM to 5:14 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.85:275:16
211.85:275:16
311.85:265:16
411.85:255:16
511.95:255:16
611.95:245:16
711.95:245:16
811.95:235:16
911.95:225:16
1011.95:225:15
1111.95:215:15
1211.95:205:15
1311.95:205:15
1411.95:195:15
1511.95:195:15
1611.95:185:15
1712.05:175:15
1812.05:175:15
1912.05:165:15
2012.05:155:14
2112.05:155:14
2212.05:145:14
2312.05:135:14
2412.05:135:14
2512.05:125:14
2612.05:125:14
2712.05:115:14
2812.15:105:14
2912.15:105:14
3012.15:095:14

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.71 kWh/m².

For context, solar energy here swings from a low near 4.26 kWh/m² to a high of 6.5 kWh/m² in November across the year — September's 5.71 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.3Bright
25.4Bright
35.4Bright
45.4Bright
55.4Bright
65.5Bright
75.5Bright
85.5Bright
95.5Bright
105.5Bright
115.6Bright
125.6Bright
135.6Bright
145.7Bright
155.7Bright
165.7Bright
175.8Bright
185.8Bright
195.8Bright
205.8Bright
215.9Bright
225.9Bright
235.9Bright
246.0Bright
256.0Bright
266.0Intense
276.0Intense
286.1Intense
296.1Intense
306.1Intense
Planning a trip in September

Hazard calendar for Barra de Santo Antônio

In seasonPeak

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

Barra de Santo Antônio's rainy season runs March–August, 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 Barra de Santo Antônio?

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

5.9
Sightseeing
4th-best month of the year
5.4
Beach & pool
7th-best month of the year

September is a reasonable time to visit Barra de Santo Antônio for sightseeing.

What to pack for Barra de Santo Antônio in September

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

In September, Barra de Santo Antônio sees daytime highs around 25°C and nights near 24°C. Pack rain gear. Worth having: light clothes and sun protection. About 18 days see rain.

rain gearlight clothessun protection

Sea temperature near Barra de Santo Antônio in September

The nearest coast averages about 26°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 15 km away) is warmest in April at about 29°C and coldest in August near 26°C.

The water stays above 20°C all year — warm enough for a swim any month.

24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan28Warm
Feb28Tropical
Mar29Tropical
Apr29Tropical
May28Tropical
Jun27Warm
Jul26Warm
Aug26Warm
Sep26Warm
Oct27Warm
Nov27Warm
Dec27Warm

UV index in Barra de Santo Antônio 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 Barra de Santo Antônio peaks around March 11 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeMar 11UV 14Jun 22UV 9
UV index (midday)Level
Jan13Extreme
Feb14Extreme
Mar15Extreme
Apr13Extreme
May11Extreme
Jun9Very high
Jul9Very high
Aug9Very high
Sep12Extreme
Oct12Extreme
Nov12Extreme
Dec12Extreme
Location & terrain

Where is Barra de Santo Antônio?

Barra de Santo Antônio sits at 9.4°S, 35.5°W, 29 m above sea level, in Brazil. The nearest listed city is São Luís do Quitunde, 11 km away.

Topography around Barra de Santo Antônio

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

Within 3 km, the terrain around Barra de Santo Antônio has only modest variations in elevation — a maximum elevation change of 60 m around an average of 15 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 117 m; within 80 km, large variations in elevation — a maximum elevation change of 748 m.

The land around Barra de Santo Antônio is covered by water (36%) and grassland (20%) within 3 km, water (47%) and trees (24%) within 16 km, and grassland (40%) and water (36%) within 80 km.

3 km
60 m
16 km
117 m
80 km
748 m
treesgrasslandcroplandartificial surfaceswaterwetlandmangroves
September weather nearby: São Luís do Quitunde 11 km · Matriz de Camaragibe 28 km · Messias 37 km · Maceió 38 km · Rio Largo 39 km · Satuba 39 km · Joaquim Gomes 40 km · Porto Calvo 42 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 de Santo Antônio (-9.4047°, -35.5072°, elevation 29 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).