Boa Vista weather in October

In October, Boa Vista sees average daytime highs of 33°C and overnight lows near 24°C, with 71 mm of rain across 12.8 wet days and about 11.9 hours of daylight. It is the 3rd-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 33°C through the month. The sky is clear or mostly clear about 31% of the time in October, and the air most often feels oppressive.

Daylight stretches from about 12 hours at the start of October to 11 h 54 min by month's end. Set against the rest of the year, October is Boa Vista's 2nd-clearest and 7th-windiest month. For the whole year in context, see Boa Vista's year-round climate.

Daytime high
33°
3rd warmest
Overnight low
24°
6th coldest
Rainfall
71 mm
12.8 wet days
Daylight
11 h 54 min
5:50 AM – 5:46 PM
Cloud cover
58%
2nd clearest
Wind
6 km/h
7th windiest
Solar energy
5.72 kWh/m²
Travel score
3.3
out of 10

Boa Vista is human settlement in Brazil, Roraima.

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

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 33°C through the month.

A typical October day in Boa Vista reaches about 33°C in the afternoon and slips back to 24°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 31°C and 35°C. Set against its neighbours, October runs about 1°C warmer than September and on par with November.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13324
23324
33324
43324
53324
63324
73324
83324
93324
103324
113324
123324
133324
143324
153324
163324
173324
183324
193324
203324
213324
223324
233324
243324
253324
263324
273324
283324
293324
303324
313324

How October really feels in Boa Vista

Once humidity and wind are folded in, October 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 October is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Boa Vista weather by month

How October compares with the rest of the year at a glance. October is the 3rd-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan33° / 24°346.711.93.8
Feb33° / 25°315.711.93.6
Mar33° / 25°599.2123.2
Apr32° / 24°20017.412.13.1
May30° / 24°34426.412.13.0
Jun29° / 23°31027.312.23.1
Jul29° / 23°24926.712.13.3
Aug31° / 23°15622.312.13.4
Sep32° / 24°9415.4123.5
Oct33° / 24°7112.811.93.3
Nov33° / 24°9013.611.93.2
Dec32° / 24°5810.211.83.7

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 22% of October, with mostly cloudy or overcast conditions the remaining 47%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16139
26040
36040
45941
55941
65743
75644
85644
95446
105446
115446
125248
135248
145248
155248
165248
175248
185248
195248
205347
215347
225248
235248
245248
255149
265050
274951
284852
294753
304654
314654

Chance of precipitation in October

Any precipitation

Boa Vista gets around 71 mm of rain over 12.8 wet days in October. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 42% and peaks near 43% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
140
240
340
440
540
641
741
841
941
1042
1142
1242
1342
1443
1543
1643
1743
1842
1942
2042
2142
2242
2342
2441
2542
2642
2742
2842
2942
3043
3143

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, October lands in the oppressive band about 69% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1076231
2076330
3086329
4086329
5086428
6076528
7076627
8076627
9076726
10076726
11076825
12076825
13076825
14076825
15076924
16076924
17076924
18077023
19077023
20077122
21077122
22067321
23067321
24067321
25067420
26167320
27167320
28167221
29157321
30157321
31157222

Wind in October

Winds average 6 km/h in October.

Across October, daily wind ranges from about 6 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in October

DaylightNight

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

Days shrink by about 6 minutes over October. Sunrise moves from 5:52 AM to 5:49 AM, and sunset from 5:51 PM to 5:43 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.05:525:51
212.05:525:51
312.05:525:50
412.05:525:50
512.05:515:49
612.05:515:49
712.05:515:49
812.05:515:48
912.05:515:48
1012.05:505:48
1111.95:505:47
1211.95:505:47
1311.95:505:47
1411.95:505:46
1511.95:505:46
1611.95:505:46
1711.95:505:46
1811.95:495:45
1911.95:495:45
2011.95:495:45
2111.95:495:45
2211.95:495:44
2311.95:495:44
2411.95:495:44
2511.95:495:44
2611.95:495:44
2711.95:495:44
2811.95:495:44
2911.95:495:43
3011.95:495:43
3111.95:495:43

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 5.72 kWh/m² — the sunniest month for solar.

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 — October's 5.72 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.8Bright
25.8Bright
35.8Bright
45.8Bright
55.8Bright
65.8Bright
75.8Bright
85.8Bright
95.8Bright
105.8Bright
115.7Bright
125.7Bright
135.7Bright
145.7Bright
155.7Bright
165.7Bright
175.7Bright
185.7Bright
195.7Bright
205.7Bright
215.7Bright
225.7Bright
235.6Bright
245.6Bright
255.6Bright
265.6Bright
275.6Bright
285.5Bright
295.5Bright
305.5Bright
315.5Bright
Planning a trip in October

Hazard calendar for Boa Vista

In seasonPeak

None of Boa Vista's seasonal hazards are active in October. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

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 October a good time to visit Boa Vista?

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

3.3
Sightseeing
6th-best month of the year
5.8
Beach & pool
5th-best month of the year

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

What to pack for Boa Vista in October

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

In October, Boa Vista sees daytime highs around 33°C and nights near 24°C. Pack light clothes. Worth having: rain gear and sun protection. About 13 days see rain.

light clothesrain gearsun protection

UV index in Boa Vista in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 20UV 15Nov 17UV 11
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar15Extreme
Apr14Extreme
May13Extreme
Jun12Extreme
Jul11Extreme
Aug12Extreme
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec11Extreme

Air quality in Boa Vista in October

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where October 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).

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateMar 2222 µg/m³Aug 2212 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb19Moderate
Mar23Moderate
Apr22Moderate
May15Moderate
Jun13Moderate
Jul12Moderate
Aug12Good
Sep12Good
Oct13Moderate
Nov13Moderate
Dec13Moderate
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
16 km
130 m
80 km
1,011 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
October 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
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 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).