São João da Barra weather in August

In August, São João da Barra sees average daytime highs of 24°C and overnight lows near 20°C, with 26 mm of rain across 6 wet days and about 11.3 hours of daylight. It is the 11th-warmest and 11th-wettest month of the year here.

Day-to-day highs hold fairly steady near 24°C through the month. The sky is clear or mostly clear about 53% of the time in August, and the air most often feels muggy.

Daylight stretches from about 11 hours at the start of August to 11 h 30 min by month's end. Set against the rest of the year, August is São João da Barra's 2nd-clearest and 4th-windiest month. For the whole year in context, see São João da Barra's year-round climate.

Daytime high
24°
11th warmest
Overnight low
20°
2nd coldest
Rainfall
26 mm
6 wet days
Daylight
11 h 18 min
7:11 AM – 6:26 PM
Cloud cover
39%
2nd clearest
Wind
20 km/h
4th windiest
Solar energy
4.45 kWh/m²
Travel score
8.0
out of 10

São João da Barra is settlement in Brazil.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 24°C through the month.

A typical August day in São João da Barra reaches about 24°C in the afternoon and slips back to 20°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 26°C. Set against its neighbours, August runs on par with July and on par with September.

15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12420
22420
32420
42420
52420
62420
72420
82420
92420
102420
112420
122420
132420
142420
152420
162420
172420
182420
192420
202420
212420
222420
232420
242420
252420
262420
272421
282421
292421
302421
312421

São João da Barra weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 24°11410.413.26.3
Feb28° / 24°547.612.76.5
Mar28° / 24°11212.712.26.0
Apr27° / 23°7511.411.56.5
May25° / 22°519.6117.1
Jun25° / 21°256.310.77.8
Jul24° / 20°296.510.88.0
Aug24° / 20°26611.38.0
Sep25° / 21°488.111.97.5
Oct25° / 22°788.812.57.0
Nov26° / 23°13913.8135.9
Dec27° / 24°15114.313.35.8

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 53% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 20% of August, with mostly cloudy or overcast conditions the remaining 27%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17228
27228
37228
47327
57327
67327
77228
87228
97228
107327
117327
127327
137327
147426
157426
167426
177426
187426
197525
207426
217426
227426
237426
247327
257327
267327
277228
287228
297228
307228
317228

Chance of precipitation in August

Any precipitation

São João da Barra gets around 26 mm of rain over 6 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 20% and peaks near 22% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
119
219
319
418
518
618
718
819
919
1019
1120
1220
1321
1421
1522
1622
1722
1822
1922
2022
2122
2221
2321
2421
2520
2620
2720
2820
2920
3020
3120

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the muggy band about 52% of days. Sticky, muggy-or-worse air turns up on roughly 52% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
131631500
231631500
331631500
431631500
531631500
631630501
731630501
831630501
931630501
1031630491
1131630491
1231631491
1331631491
1431632481
1531632481
1631632481
1731632481
1821632481
1921632491
2021632500
2121532510
2221432520
2321431530
2421330550
2521329560
2621329560
2721228571
2821227581
2921226591
3031226581
3131225591

Wind in August

Winds average 20 km/h in August.

Across August, daily wind ranges from about 18 km/h on the calmest days to 21 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202531
Wind speed (km/h)Feels
118light breeze
219light breeze
319light breeze
419light breeze
519light breeze
619light breeze
719light breeze
819light breeze
919light breeze
1019light breeze
1119light breeze
1219light breeze
1320light breeze
1420light breeze
1520light breeze
1620light breeze
1720light breeze
1820breezy
1920breezy
2020breezy
2120breezy
2220breezy
2320breezy
2421breezy
2521breezy
2621breezy
2721breezy
2821breezy
2921breezy
3021breezy
3121breezy

Sunrise & sunset in August

DaylightNight

Daylight runs from about 11 hours at the start of August to 11 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 30 minutes over August. Sunrise moves from 7:20 AM to 6:58 AM, and sunset from 6:20 PM to 6:31 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.07:206:20
211.07:206:21
311.07:196:21
411.07:196:21
511.17:186:22
611.17:186:22
711.17:176:23
811.17:166:23
911.17:166:23
1011.17:156:24
1111.27:146:24
1211.27:146:24
1311.27:136:25
1411.27:126:25
1511.27:126:25
1611.37:116:26
1711.37:106:26
1811.37:096:27
1911.37:086:27
2011.37:086:27
2111.37:076:27
2211.47:066:28
2311.47:056:28
2411.47:046:28
2511.47:036:29
2611.47:036:29
2711.57:026:29
2811.57:016:30
2911.57:006:30
3011.56:596:30
3111.56:586:31

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.45 kWh/m².

For context, solar energy here swings from a low near 3.64 kWh/m² to a high of 6.72 kWh/m² in February across the year — August's 4.45 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.0Bright
24.1Bright
34.1Bright
44.1Bright
54.2Bright
64.2Bright
74.2Bright
84.2Bright
94.3Bright
104.3Bright
114.3Bright
124.3Bright
134.3Bright
144.4Bright
154.4Bright
164.4Bright
174.5Bright
184.5Bright
194.5Bright
204.5Bright
214.6Bright
224.6Bright
234.6Bright
244.7Bright
254.7Bright
264.7Bright
274.8Bright
284.8Bright
294.8Bright
304.9Bright
314.9Bright
Planning a trip in August

Hazard calendar for São João da Barra

In seasonPeak

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

São João da Barra's rainy season runs October–January, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is August a good time to visit São João da Barra?

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

8.0
Sightseeing
1st-best month of the year
6.8
Beach & pool
4th-best month of the year

August is one of the better times to visit São João da Barra for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for São João da Barra in August

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

In August, São João da Barra sees daytime highs around 24°C and nights near 20°C. Worth packing: light clothes. About 6 days see rain.

light clothes

Sea temperature near São João da Barra in August

The nearest coast averages about 22°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 18 km away) is warmest in March at about 25°C and coldest in August near 22°C.

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

20°22°24°26°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmcomfortable to swim
Sea temperature (°C)Comfort
Jan24Warm
Feb25Warm
Mar25Warm
Apr25Warm
May24Warm
Jun23Refreshing
Jul23Refreshing
Aug22Refreshing
Sep22Refreshing
Oct23Refreshing
Nov24Refreshing
Dec24Warm

UV index in São João da Barra in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August 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 São João da Barra peaks around February 9 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 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 highExtremeFeb 9UV 14Jun 23UV 6
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar12Extreme
Apr9Very high
May7High
Jun6High
Jul6High
Aug8Very high
Sep9Very high
Oct12Extreme
Nov13Extreme
Dec13Extreme
Location & terrain

Where is São João da Barra?

São João da Barra sits at 21.6°S, 41.1°W, 7 m above sea level, in Brazil. The nearest listed city is Campos dos Goytacazes, 31 km away.

Topography around São João da Barra

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

Within 3 km, the terrain around São João da Barra has only modest variations in elevation — a maximum elevation change of 11 m around an average of 2 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 19 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,525 m.

The land around São João da Barra is covered by grassland (59%) within 3 km, water (47%) and grassland (37%) within 16 km, and grassland (44%) and water (38%) within 80 km.

3 km
11 m
16 km
19 m
80 km
1,525 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetlandmangroves
August weather nearby: Campos dos Goytacazes 31 km · São Francisco de Itabapoana 39 km · Quissamã 68 km · Marataizes 70 km · Mimoso do Sul 72 km · São Fidélis 72 km · Itapemirim 73 km · Bom Jesus do Itabapoana 86 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 São João da Barra (-21.6403°, -41.0511°, elevation 7 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).