Boa Vista weather in August

In August, Boa Vista sees average daytime highs of 31°C and overnight lows near 23°C, with 156 mm of rain across 22.3 wet days and about 12.1 hours of daylight. It is the 9th-warmest and 5th-wettest month of the year here.

Highs climb over the month, from about 30°C in the first days to 31°C by the end. The sky is clear or mostly clear about 26% of the time in August, and the air most often feels oppressive.

Daylight stretches from about 12 h 06 min at the start of August to 12 h 06 min by month's end. Set against the rest of the year, August is Boa Vista's 3rd-clearest and 11th-windiest month. For the whole year in context, see Boa Vista's year-round climate.

Daytime high: 31°; 9th warmest
Overnight low: 23°; 3rd coldest
Rainfall: 156 mm; 22.3 wet days
Daylight: 12 h 06 min; 6:04 AM – 6:10 PM
Cloud cover: 60%; 3rd clearest
Wind: 5 km/h; 11th windiest
Solar energy: 4.86 kWh/m²
Travel score: 3.4; out of 10

Boa Vista is human settlement in Brazil, Roraima.

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

← July Boa Vista year-round climate September →Best places to visit in August

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

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 30°C in the first days to 31°C by the end.

A typical August day in Boa Vista reaches about 31°C in the afternoon and slips back to 23°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 32°C. Set against its neighbours, August runs about 1°C warmer than July and about 2°C cooler than September.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Avg high (°C)	30	30	30	30	30	30	30	30	30	30	30	30	30	30	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	31	32
Avg low (°C)	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23	23

	Avg high (°C)	Avg low (°C)
1	30	23
2	30	23
3	30	23
4	30	23
5	30	23
6	30	23
7	30	23
8	30	23
9	30	23
10	30	23
11	30	23
12	30	23
13	30	23
14	30	23
15	31	23
16	31	23
17	31	23
18	31	23
19	31	23
20	31	23
21	31	23
22	31	23
23	31	23
24	31	23
25	31	23
26	31	23
27	31	23
28	31	23
29	31	23
30	31	23
31	32	23

How August really feels in 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

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

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

Boa Vista weather by month

How August compares with the rest of the year at a glance. August is the 9th-warmest and 5th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	33° / 24°	34	6.7	11.9	3.8
Feb	33° / 25°	31	5.7	11.9	3.6
Mar	33° / 25°	59	9.2	12	3.2
Apr	32° / 24°	200	17.4	12.1	3.1
May	30° / 24°	344	26.4	12.1	3.0
Jun	29° / 23°	310	27.3	12.2	3.1
Jul	29° / 23°	249	26.7	12.1	3.3
Aug	31° / 23°	156	22.3	12.1	3.4
Sep	32° / 24°	94	15.4	12	3.5
Oct	33° / 24°	71	12.8	11.9	3.3
Nov	33° / 24°	90	13.6	11.9	3.2
Dec	32° / 24°	58	10.2	11.8	3.7

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 26% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 21% of August, with mostly cloudy or overcast conditions the remaining 53%. Skies tend to open up as the month goes on.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Clearer (%)	38	38	38	39	39	39	40	40	40	42	42	43	43	43	45	45	46	47	49	49	50	51	52	54	54	55	55	56	57	58	59
Cloudier (%)	62	62	62	61	61	61	60	60	60	58	58	57	57	57	55	55	54	53	51	51	50	49	48	46	46	45	45	44	43	42	41

	Clearer (%)	Cloudier (%)
1	38	62
2	38	62
3	38	62
4	39	61
5	39	61
6	39	61
7	40	60
8	40	60
9	40	60
10	42	58
11	42	58
12	43	57
13	43	57
14	43	57
15	45	55
16	45	55
17	46	54
18	47	53
19	49	51
20	49	51
21	50	50
22	51	49
23	52	48
24	54	46
25	54	46
26	55	45
27	55	45
28	56	44
29	57	43
30	58	42
31	59	41

Chance of precipitation in August

Any precipitation

Boa Vista gets around 156 mm of rain over 22.3 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 73% and peaks near 81% on the wettest days. The odds ease toward the end of the month.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Rain chance (%)	81	81	80	80	80	80	79	79	78	78	77	77	76	75	75	74	73	73	72	71	69	68	67	66	65	64	64	63	62	61	61

	Rain chance (%)
1	81
2	81
3	80
4	80
5	80
6	80
7	79
8	79
9	78
10	78
11	77
12	77
13	76
14	75
15	75
16	74
17	73
18	73
19	72
20	71
21	69
22	68
23	67
24	66
25	65
26	64
27	64
28	63
29	62
30	61
31	61

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the oppressive band about 68% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Oppressive (%)	82	81	80	79	78	76	75	74	73	73	72	71	70	69	68	67	67	66	65	64	64	63	62	62	61	60	59	58	58	58	58
Miserable (%)	18	19	20	21	22	24	25	26	27	27	28	29	30	31	32	33	33	34	35	36	36	37	38	38	39	40	41	42	42	42	42

	Oppressive (%)	Miserable (%)
1	82	18
2	81	19
3	80	20
4	79	21
5	78	22
6	76	24
7	75	25
8	74	26
9	73	27
10	73	27
11	72	28
12	71	29
13	70	30
14	69	31
15	68	32
16	67	33
17	67	33
18	66	34
19	65	35
20	64	36
21	64	36
22	63	37
23	62	38
24	62	38
25	61	39
26	60	40
27	59	41
28	58	42
29	58	42
30	58	42
31	58	42

Wind in August

Winds average 5 km/h in August.

Across August, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Wind speed (km/h)	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5	5
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	5	calm
2	5	calm
3	5	calm
4	5	calm
5	5	calm
6	5	calm
7	5	calm
8	5	calm
9	5	calm
10	5	calm
11	5	calm
12	5	calm
13	5	calm
14	5	calm
15	5	calm
16	5	calm
17	5	calm
18	5	calm
19	5	calm
20	5	calm
21	5	calm
22	5	calm
23	5	calm
24	5	calm
25	5	calm
26	5	calm
27	5	calm
28	5	calm
29	5	calm
30	5	calm
31	5	calm

Sunrise & sunset in August

DaylightNight

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

Days grow by about 0 minutes over August. Sunrise moves from 6:05 AM to 6:01 AM, and sunset from 6:12 PM to 6:04 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Daylight (h)	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1
Sunrise (AM)	6:05	6:05	6:05	6:05	6:05	6:05	6:05	6:05	6:05	6:05	6:05	6:04	6:04	6:04	6:04	6:04	6:04	6:04	6:04	6:03	6:03	6:03	6:03	6:03	6:02	6:02	6:02	6:02	6:02	6:01	6:01
Sunset (PM)	6:12	6:12	6:12	6:12	6:12	6:12	6:12	6:11	6:11	6:11	6:11	6:11	6:10	6:10	6:10	6:10	6:09	6:09	6:09	6:08	6:08	6:08	6:07	6:07	6:07	6:06	6:06	6:06	6:05	6:05	6:04

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.1	6:05	6:12
2	12.1	6:05	6:12
3	12.1	6:05	6:12
4	12.1	6:05	6:12
5	12.1	6:05	6:12
6	12.1	6:05	6:12
7	12.1	6:05	6:12
8	12.1	6:05	6:11
9	12.1	6:05	6:11
10	12.1	6:05	6:11
11	12.1	6:05	6:11
12	12.1	6:04	6:11
13	12.1	6:04	6:10
14	12.1	6:04	6:10
15	12.1	6:04	6:10
16	12.1	6:04	6:10
17	12.1	6:04	6:09
18	12.1	6:04	6:09
19	12.1	6:04	6:09
20	12.1	6:03	6:08
21	12.1	6:03	6:08
22	12.1	6:03	6:08
23	12.1	6:03	6:07
24	12.1	6:03	6:07
25	12.1	6:02	6:07
26	12.1	6:02	6:06
27	12.1	6:02	6:06
28	12.1	6:02	6:06
29	12.1	6:02	6:05
30	12.1	6:01	6:05
31	12.1	6:01	6:04

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.86 kWh/m².

For context, solar energy here swings from a low near 3.8 kWh/m² to a high of 5.72 kWh/m² in October across the year — August's 4.86 kWh/m² falls in the middle.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Solar energy (kWh/m²)	4.4	4.5	4.5	4.5	4.5	4.5	4.6	4.6	4.6	4.7	4.7	4.7	4.7	4.8	4.8	4.8	4.8	4.9	4.9	5.0	5.0	5.0	5.1	5.1	5.2	5.2	5.2	5.3	5.3	5.3	5.3
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	4.4	Bright
2	4.5	Bright
3	4.5	Bright
4	4.5	Bright
5	4.5	Bright
6	4.5	Bright
7	4.6	Bright
8	4.6	Bright
9	4.6	Bright
10	4.7	Bright
11	4.7	Bright
12	4.7	Bright
13	4.7	Bright
14	4.8	Bright
15	4.8	Bright
16	4.8	Bright
17	4.8	Bright
18	4.9	Bright
19	4.9	Bright
20	5.0	Bright
21	5.0	Bright
22	5.0	Bright
23	5.1	Bright
24	5.1	Bright
25	5.2	Bright
26	5.2	Bright
27	5.2	Bright
28	5.3	Bright
29	5.3	Bright
30	5.3	Bright
31	5.3	Bright

Planning a trip in August

Hazard calendar for Boa Vista

In seasonPeak

In August, Boa Vista sits inside its monsoon season. The full year is below, with each hazard's peak months called out.

Boa Vista's monsoon runs April–August, 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 Boa Vista?

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

3.4

Sightseeing

5th-best month of the year

4.9

Beach & pool

9th-best month of the year

August is a weaker month for outdoor sightseeing in Boa Vista.

What to pack for Boa Vista in August

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

In August, Boa Vista sees daytime highs around 31°C and nights near 23°C. Pack light clothes and rain gear. Worth having: sun protection. About 22 days see rain.

light clothesrain gearsun protection

UV index in Boa Vista in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August 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 Boa Vista peaks around March 20 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 17 at about 11 (extreme).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	14	13	15	14	13	12	11	12	12	12	11	11
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme

	UV index (midday)	Level
Jan	14	Extreme
Feb	13	Extreme
Mar	15	Extreme
Apr	14	Extreme
May	13	Extreme
Jun	12	Extreme
Jul	11	Extreme
Aug	12	Extreme
Sep	12	Extreme
Oct	12	Extreme
Nov	11	Extreme
Dec	11	Extreme

Air quality in 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 Boa Vista is worst in March — around 23 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (August, 12 µg/m³).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	15	19	23	22	15	13	12	12	12	13	13	13
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Good	Good	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	15	Moderate
Feb	19	Moderate
Mar	23	Moderate
Apr	22	Moderate
May	15	Moderate
Jun	13	Moderate
Jul	12	Moderate
Aug	12	Good
Sep	12	Good
Oct	13	Moderate
Nov	13	Moderate
Dec	13	Moderate

Location & terrain

Where is Boa Vista?

Boa Vista sits at 2.8°N, 60.7°W, 82 m above sea level, in Brazil. The nearest listed city is Cantá, 25 km away.

Topography around Boa Vista

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

Within 3 km, the terrain around Boa Vista has only modest variations in elevation — a maximum elevation change of 29 m around an average of 75 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 130 m; within 80 km, large variations in elevation — a maximum elevation change of 1,011 m.

The land around Boa Vista is covered by artificial surfaces (50%) within 3 km, grassland (67%) within 16 km, and grassland (56%) and trees (41%) within 80 km.

3 km

29 m

artificial surfaces 50%

16 km

130 m

grassland 67%

80 km

1,011 m

grassland 56%

treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland

← July Boa Vista year-round climate September →Best places to visit in August

August weather nearby: Cantá 25 km · Mucajaí 50 km · Alto Alegre 92 km · Lethem 115 km · Caracaraí 123 km · Pacaraima 187 km · Santa Elena de Uairén 204 km · Rorainópolis 210 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

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 Boa Vista (2.8197°, -60.6733°, elevation 82 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).

	Avg high (°C)	Avg low (°C)
1	30	23
2	30	23
3	30	23
4	30	23
5	30	23
6	30	23
7	30	23
8	30	23
9	30	23
10	30	23
11	30	23
12	30	23
13	30	23
14	30	23
15	31	23
16	31	23
17	31	23
18	31	23
19	31	23
20	31	23
21	31	23
22	31	23
23	31	23
24	31	23
25	31	23
26	31	23
27	31	23
28	31	23
29	31	23
30	31	23
31	32	23

	Clearer (%)	Cloudier (%)
1	38	62
2	38	62
3	38	62
4	39	61
5	39	61
6	39	61
7	40	60
8	40	60
9	40	60
10	42	58
11	42	58
12	43	57
13	43	57
14	43	57
15	45	55
16	45	55
17	46	54
18	47	53
19	49	51
20	49	51
21	50	50
22	51	49
23	52	48
24	54	46
25	54	46
26	55	45
27	55	45
28	56	44
29	57	43
30	58	42
31	59	41

	Rain chance (%)
1	81
2	81
3	80
4	80
5	80
6	80
7	79
8	79
9	78
10	78
11	77
12	77
13	76
14	75
15	75
16	74
17	73
18	73
19	72
20	71
21	69
22	68
23	67
24	66
25	65
26	64
27	64
28	63
29	62
30	61
31	61

	Oppressive (%)	Miserable (%)
1	82	18
2	81	19
3	80	20
4	79	21
5	78	22
6	76	24
7	75	25
8	74	26
9	73	27
10	73	27
11	72	28
12	71	29
13	70	30
14	69	31
15	68	32
16	67	33
17	67	33
18	66	34
19	65	35
20	64	36
21	64	36
22	63	37
23	62	38
24	62	38
25	61	39
26	60	40
27	59	41
28	58	42
29	58	42
30	58	42
31	58	42

	Avg high (°C)	Avg low (°C)
1	30	23
2	30	23
3	30	23
4	30	23
5	30	23
6	30	23
7	30	23
8	30	23
9	30	23
10	30	23
11	30	23
12	30	23
13	30	23
14	30	23
15	31	23
16	31	23
17	31	23
18	31	23
19	31	23
20	31	23
21	31	23
22	31	23
23	31	23
24	31	23
25	31	23
26	31	23
27	31	23
28	31	23
29	31	23
30	31	23
31	32	23

	Clearer (%)	Cloudier (%)
1	38	62
2	38	62
3	38	62
4	39	61
5	39	61
6	39	61
7	40	60
8	40	60
9	40	60
10	42	58
11	42	58
12	43	57
13	43	57
14	43	57
15	45	55
16	45	55
17	46	54
18	47	53
19	49	51
20	49	51
21	50	50
22	51	49
23	52	48
24	54	46
25	54	46
26	55	45
27	55	45
28	56	44
29	57	43
30	58	42
31	59	41

	Rain chance (%)
1	81
2	81
3	80
4	80
5	80
6	80
7	79
8	79
9	78
10	78
11	77
12	77
13	76
14	75
15	75
16	74
17	73
18	73
19	72
20	71
21	69
22	68
23	67
24	66
25	65
26	64
27	64
28	63
29	62
30	61
31	61

	Oppressive (%)	Miserable (%)
1	82	18
2	81	19
3	80	20
4	79	21
5	78	22
6	76	24
7	75	25
8	74	26
9	73	27
10	73	27
11	72	28
12	71	29
13	70	30
14	69	31
15	68	32
16	67	33
17	67	33
18	66	34
19	65	35
20	64	36
21	64	36
22	63	37
23	62	38
24	62	38
25	61	39
26	60	40
27	59	41
28	58	42
29	58	42
30	58	42
31	58	42

	Avg high (°C)	Avg low (°C)
1	30	23
2	30	23
3	30	23
4	30	23
5	30	23
6	30	23
7	30	23
8	30	23
9	30	23
10	30	23
11	30	23
12	30	23
13	30	23
14	30	23
15	31	23
16	31	23
17	31	23
18	31	23
19	31	23
20	31	23
21	31	23
22	31	23
23	31	23
24	31	23
25	31	23
26	31	23
27	31	23
28	31	23
29	31	23
30	31	23
31	32	23

	Clearer (%)	Cloudier (%)
1	38	62
2	38	62
3	38	62
4	39	61
5	39	61
6	39	61
7	40	60
8	40	60
9	40	60
10	42	58
11	42	58
12	43	57
13	43	57
14	43	57
15	45	55
16	45	55
17	46	54
18	47	53
19	49	51
20	49	51
21	50	50
22	51	49
23	52	48
24	54	46
25	54	46
26	55	45
27	55	45
28	56	44
29	57	43
30	58	42
31	59	41

	Rain chance (%)
1	81
2	81
3	80
4	80
5	80
6	80
7	79
8	79
9	78
10	78
11	77
12	77
13	76
14	75
15	75
16	74
17	73
18	73
19	72
20	71
21	69
22	68
23	67
24	66
25	65
26	64
27	64
28	63
29	62
30	61
31	61

	Oppressive (%)	Miserable (%)
1	82	18
2	81	19
3	80	20
4	79	21
5	78	22
6	76	24
7	75	25
8	74	26
9	73	27
10	73	27
11	72	28
12	71	29
13	70	30
14	69	31
15	68	32
16	67	33
17	67	33
18	66	34
19	65	35
20	64	36
21	64	36
22	63	37
23	62	38
24	62	38
25	61	39
26	60	40
27	59	41
28	58	42
29	58	42
30	58	42
31	58	42