São Sebastião da Boa Vista weather in August

In August, São Sebastião da Boa Vista sees average daytime highs of 32°C and overnight lows near 25°C, with 34 mm of rain across 8.3 wet days and about 11.9 hours of daylight. It is the 4th-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 65% of the time in August, and the air most often feels miserable.

Daylight stretches from about 11 h 54 min at the start of August to 12 hours by month's end. Set against the rest of the year, August is São Sebastião da Boa Vista's 1st-clearest and 5th-windiest month. For the whole year in context, see São Sebastião da Boa Vista's year-round climate.

Daytime high
32°
4th warmest
Overnight low
25°
8th coldest
Rainfall
34 mm
8.3 wet days
Daylight
11 h 54 min
6:24 AM – 6:21 PM
Cloud cover
37%
1st clearest
Wind
9 km/h
5th windiest
Solar energy
6.07 kWh/m²
Travel score
4.3
out of 10

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 32°C through the month.

A typical August day in São Sebastião da Boa Vista reaches about 32°C in the afternoon and slips back to 25°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 31°C and 33°C. Set against its neighbours, August runs on par with July and on par with September.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13225
23225
33225
43225
53225
63225
73225
83225
93225
103225
113225
123225
133225
143225
153225
163225
173225
183225
193225
203225
213225
223225
233225
243225
253225
263225
273225
283225
293225
303225
313225

How August really feels in São Sebastião da Boa Vista

Once humidity and wind are folded in, August averages 31 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
31
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

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

São Sebastião da Boa Vista weather by month

How August compares with the rest of the year at a glance. August is the 4th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 24°26127.712.12.8
Feb30° / 24°34926.812.12.7
Mar30° / 24°44330.4122.6
Apr30° / 24°41729.4122.6
May31° / 25°29827.811.92.8
Jun31° / 24°13220.411.93.4
Jul31° / 24°7615.311.94.0
Aug32° / 25°348.311.94.3
Sep32° / 25°184.5124.4
Oct33° / 25°204.9124.2
Nov32° / 25°437.312.14.0
Dec32° / 25°1141712.13.4

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 65% of the time in August, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 21% of August, with mostly cloudy or overcast conditions the remaining 13%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18515
28515
38614
48614
58614
68614
78614
88614
98614
108614
118614
128515
138515
148515
158614
168614
178614
188614
198614
208713
218713
228713
238713
248812
258812
268812
278911
288911
298911
308911
318911

Chance of precipitation in August

Any precipitation

São Sebastião da Boa Vista gets around 34 mm of rain over 8.3 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 26% and peaks near 32% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
132
231
331
431
530
630
730
830
930
1029
1129
1229
1328
1428
1527
1627
1726
1826
1925
2025
2124
2224
2324
2423
2523
2622
2722
2822
2921
3021
3121

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the miserable band about 61% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
13367
23367
33367
43367
53367
63367
73466
83466
93466
103565
113565
123664
133664
143763
153763
163862
173862
183862
193961
203961
214060
224060
234159
244258
254357
264456
274555
284753
294852
305050
315149

Wind in August

Winds average 9 km/h in August.

Across August, daily wind ranges from about 8 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in August

DaylightNight

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

Days grow by about 6 minutes over August. Sunrise moves from 6:26 AM to 6:19 AM, and sunset from 6:22 PM to 6:17 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:266:22
211.96:266:22
311.96:266:22
411.96:266:22
511.96:266:22
611.96:266:22
711.96:266:22
811.96:266:22
911.96:256:21
1011.96:256:21
1111.96:256:21
1211.96:256:21
1311.96:256:21
1411.96:246:21
1511.96:246:21
1611.96:246:21
1711.96:246:20
1811.96:236:20
1911.96:236:20
2011.96:236:20
2112.06:236:20
2212.06:226:19
2312.06:226:19
2412.06:226:19
2512.06:216:19
2612.06:216:18
2712.06:216:18
2812.06:206:18
2912.06:206:18
3012.06:206:17
3112.06:196:17

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 6.07 kWh/m².

For context, solar energy here swings from a low near 4.51 kWh/m² to a high of 6.65 kWh/m² in October across the year — August's 6.07 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.8Bright
45.9Bright
55.9Bright
65.9Bright
75.9Bright
85.9Bright
95.9Bright
106.0Bright
116.0Bright
126.0Bright
136.0Intense
146.0Intense
156.0Intense
166.1Intense
176.1Intense
186.1Intense
196.1Intense
206.1Intense
216.2Intense
226.2Intense
236.2Intense
246.2Intense
256.2Intense
266.2Intense
276.3Intense
286.3Intense
296.3Intense
306.3Intense
316.3Intense
Planning a trip in August

Hazard calendar for São Sebastião da Boa Vista

In seasonPeak

None of São Sebastião da Boa Vista'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 Sebastião da Boa Vista's monsoon runs January–May, when most of the year's rain falls.

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

Is August a good time to visit São Sebastião da Boa Vista?

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

4.3
Sightseeing
2nd-best month of the year
7.0
Beach & pool
3rd-best month of the year

August is a reasonable time to visit São Sebastião da Boa Vista for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for São Sebastião da Boa Vista in August

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

In August, São Sebastião da Boa Vista sees daytime highs around 32°C and nights near 25°C. Pack light clothes and sun protection. Worth having: rain gear. About 8 days see rain.

light clothessun protectionrain gear

UV index in São Sebastião da Boa Vista in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 10 (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 Sebastião da Boa Vista peaks around March 14 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 24 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 14UV 15Jul 24UV 10
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar15Extreme
Apr14Extreme
May12Extreme
Jun10Extreme
Jul10Extreme
Aug10Extreme
Sep12Extreme
Oct12Extreme
Nov10Extreme
Dec10Extreme

Air quality in São Sebastião da Boa Vista in August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.

Air quality in São Sebastião da Boa Vista is worst in February — around 19 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (June, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateFeb 2019 µg/m³Jun 239 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb19Moderate
Mar19Moderate
Apr16Moderate
May11Good
Jun9Good
Jul9Good
Aug11Good
Sep13Moderate
Oct16Moderate
Nov16Moderate
Dec15Moderate
Location & terrain

Where is São Sebastião da Boa Vista?

São Sebastião da Boa Vista sits at 1.7°S, 49.5°W, 5 m above sea level, in Brazil. The nearest listed city is Limoeiro do Ajuru, 26 km away.

Topography around São Sebastião da Boa Vista

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

Within 3 km, the terrain around São Sebastião da Boa Vista has only modest variations in elevation — a maximum elevation change of 25 m around an average of 8 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 29 m; within 80 km, only modest variations in elevation — a maximum elevation change of 40 m.

The land around São Sebastião da Boa Vista is covered by trees (60%) and water (37%) within 3 km, trees (64%) and water (33%) within 16 km, and trees (71%) within 80 km.

3 km
25 m
16 km
29 m
80 km
40 m
treesgrasslandartificial surfaceswaterwetland
August weather nearby: Limoeiro do Ajuru 26 km · Curralinho 31 km · Muaná 41 km · Oeiras do Pará 48 km · Cametá 59 km · Igarapé Miri 70 km · Abaetetuba 72 km · Bagre 78 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 Sebastião da Boa Vista (-1.7146°, -49.5315°, elevation 5 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).