Porto Grande weather in October

In October, Porto Grande sees average daytime highs of 35°C and overnight lows near 23°C, with 15 mm of rain across 3.4 wet days and about 12 hours of daylight. It is the 1st-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 35°C through the month. The sky is clear or mostly clear about 49% of the time in October, and the air most often feels oppressive.

Daylight stretches from about 12 hours at the start of October to 12 hours by month's end. Set against the rest of the year, October is Porto Grande's 3rd-clearest and 1st-windiest month. For the whole year in context, see Porto Grande's year-round climate.

Daytime high
35°
1st warmest
Overnight low
23°
10th coldest
Rainfall
15 mm
3.4 wet days
Daylight
12 hours
6:11 AM – 6:10 PM
Cloud cover
47%
3rd clearest
Wind
11 km/h
1st windiest
Solar energy
6.23 kWh/m²
Travel score
3.1
out of 10

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 35°C through the month.

A typical October day in Porto Grande reaches about 35°C in the afternoon and slips back to 23°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 33°C and 36°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)
13523
23523
33523
43523
53523
63523
73523
83523
93523
103523
113523
123523
133523
143523
153523
163523
173523
183523
193523
203523
213523
223523
233523
243523
253523
263523
273523
283523
293523
303523
313523

How October really feels in Porto Grande

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.

Porto Grande weather by month

How October compares with the rest of the year at a glance. October is the 1st-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 23°19327.1122.9
Feb29° / 23°23924.9123.0
Mar30° / 23°25627.1123.0
Apr30° / 23°27128122.8
May30° / 23°24528.6122.8
Jun30° / 22°12725123.1
Jul31° / 22°9321.6123.5
Aug32° / 23°4212123.9
Sep34° / 23°174.3123.6
Oct35° / 23°153.4123.1
Nov34° / 23°316.6123.0
Dec32° / 23°10419.5123.0

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 49% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 23% of October, with mostly cloudy or overcast conditions the remaining 28%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18020
28020
38020
47921
57822
67723
77723
87525
97525
107525
117426
127426
137327
147327
157327
167228
177228
187228
197129
207030
217030
226931
236931
246733
256733
266634
276535
286535
296337
306337
316238

Chance of precipitation in October

Any precipitation

Porto Grande gets around 15 mm of rain over 3.4 wet days in October, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 11% and peaks near 14% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
19
29
310
410
510
610
711
811
911
1011
1111
1211
1311
1411
1511
1611
1711
1810
1910
2010
2111
2211
2311
2411
2512
2612
2712
2813
2913
3014
3114

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 64% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)
13367
23367
33466
43466
53466
63565
73565
83565
93664
103664
113664
123664
133664
143763
153763
163763
173862
183862
193961
203961
213862
223862
233862
243763
253763
263763
273664
283664
293565
303466
313367

Wind in October

Winds average 11 km/h in October, the windiest month of the year.

Across October, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3110calm

Sunrise & sunset in October

DaylightNight

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

Days grow by about 0 minutes over October. Sunrise moves from 6:15 AM to 6:10 AM, and sunset from 6:14 PM to 6:08 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:156:14
212.06:156:14
312.06:146:14
412.06:146:13
512.06:146:13
612.06:136:13
712.06:136:13
812.06:136:12
912.06:136:12
1012.06:126:12
1112.06:126:11
1212.06:126:11
1312.06:126:11
1412.06:126:11
1512.06:116:10
1612.06:116:10
1712.06:116:10
1812.06:116:10
1912.06:116:10
2012.06:116:09
2112.06:106:09
2212.06:106:09
2312.06:106:09
2412.06:106:09
2512.06:106:09
2612.06:106:09
2712.06:106:09
2812.06:106:09
2912.06:106:09
3012.06:106:08
3112.06:106:08

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 6.23 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 3.67 kWh/m² to a high of 6.23 kWh/m² in October across the year — October's 6.23 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.3Intense
26.3Intense
36.3Intense
46.3Intense
56.3Intense
66.3Intense
76.3Intense
86.3Intense
96.3Intense
106.3Intense
116.3Intense
126.3Intense
136.3Intense
146.3Intense
156.3Intense
166.3Intense
176.2Intense
186.2Intense
196.2Intense
206.2Intense
216.2Intense
226.2Intense
236.2Intense
246.2Intense
256.2Intense
266.1Intense
276.1Intense
286.1Intense
296.1Intense
306.1Intense
316.0Intense
Planning a trip in October

Hazard calendar for Porto Grande

In seasonPeak

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

Porto Grande's monsoon runs January–June, 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 Porto Grande?

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

3.1
Sightseeing
4th-best month of the year
6.5
Beach & pool
2nd-best month of the year

October is a weaker month for outdoor sightseeing in Porto Grande. The water and warmth also suit a beach or pool day.

What to pack for Porto Grande in October

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

In October, Porto Grande sees daytime highs around 35°C and nights near 23°C. Pack light clothes and sun protection. About 3 days see rain.

light clothessun protection

UV index in Porto Grande 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 Porto Grande peaks around February 22 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near August 10 at about 11 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeFeb 22UV 15Aug 10UV 11
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar15Extreme
Apr14Extreme
May12Extreme
Jun11Extreme
Jul11Extreme
Aug11Extreme
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec11Extreme

Air quality in Porto Grande 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 Porto Grande is worst in February — around 20 µg/m³ PM2.5 (moderate), about 2.6× the cleanest month (July, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateFeb 2020 µg/m³Jul 218 µg/m³
PM2.5 (µg/m³)Level
Jan17Moderate
Feb20Moderate
Mar19Moderate
Apr17Moderate
May10Good
Jun8Good
Jul8Good
Aug8Good
Sep10Good
Oct14Moderate
Nov14Moderate
Dec15Moderate
Location & terrain

Where is Porto Grande?

Porto Grande sits at 0.7°N, 51.4°W, 68 m above sea level, in Brazil. The nearest listed city is Macapá, 84 km away.

Anajás

Topography around Porto Grande

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

Within 3 km, the terrain around Porto Grande has only modest variations in elevation — a maximum elevation change of 59 m around an average of 74 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 177 m; within 80 km, significant variations in elevation — a maximum elevation change of 440 m.

The land around Porto Grande is covered by trees (40%) and grassland (34%) within 3 km, trees (73%) and grassland (22%) within 16 km, and trees (78%) within 80 km.

3 km
59 m
16 km
177 m
80 km
440 m
treesgrasslandartificial surfacesbare terrainwaterwetland
October weather nearby: Macapá 84 km · Santana 88 km · Mazagão 93 km · Afuá 150 km · Chaves 186 km · Laranjal do Jari 210 km · Gurupá 237 km · Anajás 250 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 Porto Grande (0.7133°, -51.4133°, elevation 68 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).