Porto Nacional weather in October

In October, Porto Nacional sees average daytime highs of 34°C and overnight lows near 24°C, with 114 mm of rain across 14.5 wet days and about 12.2 hours of daylight. It is the 3rd-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about 35°C in the first days to 32°C by the end. The sky is clear or mostly clear about 23% of the time in October, and the air most often feels oppressive.

Daylight stretches from about 12 h 06 min at the start of October to 12 h 24 min by month's end. Set against the rest of the year, October is Porto Nacional's 6th-clearest and 6th-windiest month. For the whole year in context, see Porto Nacional's year-round climate.

Daytime high
34°
3rd warmest
Overnight low
24°
11th coldest
Rainfall
114 mm
14.5 wet days
Daylight
12 h 12 min
5:51 AM – 6:06 PM
Cloud cover
65%
6th clearest
Wind
6 km/h
6th windiest
Solar energy
5.94 kWh/m²
Travel score
2.9
out of 10

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 35°C in the first days to 32°C by the end.

A typical October day in Porto Nacional reaches about 34°C in the afternoon and slips back to 24°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 37°C. Set against its neighbours, October runs about 2°C cooler than September and about 2°C warmer than November.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13524
23524
33524
43424
53424
63424
73424
83424
93424
103424
113424
123424
133424
143424
153424
163424
173424
183324
193324
203324
213323
223323
233323
243323
253323
263323
273223
283223
293223
303223
313223

How October really feels in Porto Nacional

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 Nacional weather by month

How October compares with the rest of the year at a glance. October is the 3rd-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 22°29726.212.63.0
Feb30° / 22°26623.912.42.9
Mar30° / 23°24725.312.13.0
Apr31° / 23°14416.911.83.5
May32° / 23°365.911.54.2
Jun33° / 21°20.311.44.6
Jul33° / 21°00.111.44.4
Aug35° / 22°10.311.63.3
Sep36° / 24°203.211.92.6
Oct34° / 24°11414.512.22.9
Nov31° / 23°2272212.53.0
Dec31° / 23°26124.312.63.0

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 23% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 21% of October, with mostly cloudy or overcast conditions the remaining 56%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15941
25842
35743
45743
55644
65446
75446
85347
95248
105149
115050
124852
134753
144753
154654
164456
174357
184357
194258
204060
213961
223763
233664
243565
253367
263268
273169
283169
293070
303070
312971

Chance of precipitation in October

Any precipitation

Porto Nacional gets around 114 mm of rain over 14.5 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 46% and peaks near 66% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
129
230
331
432
532
633
733
834
935
1036
1137
1238
1339
1440
1542
1643
1745
1847
1949
2051
2153
2255
2357
2459
2560
2662
2763
2864
2965
3065
3166

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 55% of days. Sticky, muggy-or-worse air turns up on roughly 81% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1410193532
2410183534
3310183435
439183436
529183438
628183339
728183240
828183141
928183142
1018183043
1117182944
1217172945
1317172947
1416162848
1516152849
1615152851
1715142753
1814132755
1914122657
2013102561
211392463
221382365
230272269
240262072
250161974
260151876
270141679
280141580
290141481
300031483
310031384

Wind in October

Winds average 6 km/h in October.

Across October, daily wind ranges from about 5 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
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in October

DaylightNight

Daylight runs from about 12 h 06 min at the start of October to 12 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 18 minutes over October. Sunrise moves from 6:00 AM to 5:46 AM, and sunset from 6:05 PM to 6:09 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.16:006:05
212.15:596:05
312.15:596:05
412.15:586:05
512.15:576:05
612.15:576:05
712.25:566:05
812.25:566:05
912.25:556:06
1012.25:556:06
1112.25:546:06
1212.25:536:06
1312.25:536:06
1412.25:526:06
1512.25:526:06
1612.25:516:06
1712.35:516:06
1812.35:516:06
1912.35:506:06
2012.35:506:06
2112.35:496:07
2212.35:496:07
2312.35:486:07
2412.35:486:07
2512.35:486:07
2612.35:476:07
2712.35:476:08
2812.45:476:08
2912.45:466:08
3012.45:466:08
3112.45:466:09

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 5.94 kWh/m².

For context, solar energy here swings from a low near 4.96 kWh/m² to a high of 6.16 kWh/m² in September across the year — October's 5.94 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.1Intense
26.1Intense
36.1Intense
46.1Intense
56.1Intense
66.1Intense
76.1Intense
86.1Intense
96.1Intense
106.0Intense
116.0Intense
126.0Intense
136.0Intense
146.0Intense
156.0Intense
166.0Bright
176.0Bright
186.0Bright
195.9Bright
205.9Bright
215.9Bright
225.8Bright
235.8Bright
245.8Bright
255.8Bright
265.8Bright
275.7Bright
285.7Bright
295.7Bright
305.7Bright
315.6Bright
Planning a trip in October

Hazard calendar for Porto Nacional

In seasonPeak

None of Porto Nacional'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 Nacional's monsoon runs November–April, 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 Nacional?

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

2.9
Sightseeing
10th-best month of the year
5.4
Beach & pool
6th-best month of the year

October is a weaker month for outdoor sightseeing in Porto Nacional.

What to pack for Porto Nacional in October

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

In October, Porto Nacional sees daytime highs around 34°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 15 days see rain.

light clothesrain gearsun protection

UV index in Porto Nacional in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October 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 Porto Nacional peaks around February 15 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 15UV 15Jun 22UV 9
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar14Extreme
Apr12Extreme
May10Extreme
Jun9Very high
Jul9Very high
Aug10Extreme
Sep12Extreme
Oct10Very high
Nov13Extreme
Dec12Extreme

Air quality in Porto Nacional 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 Nacional is worst in September — around 35 µg/m³ PM2.5 (moderate), about 4.2× the cleanest month (May, 8 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateSep 1934 µg/m³May 208 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb9Good
Mar11Good
Apr10Good
May8Good
Jun9Good
Jul9Good
Aug20Moderate
Sep35Moderate
Oct28Moderate
Nov14Moderate
Dec11Good
Location & terrain

Where is Porto Nacional?

Porto Nacional sits at 10.7°S, 48.4°W, 231 m above sea level, in Brazil. The nearest listed city is Palmas, 61 km away.

Topography around Porto Nacional

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

Within 3 km, the terrain around Porto Nacional has only modest variations in elevation — a maximum elevation change of 69 m around an average of 226 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 386 m; within 80 km, significant variations in elevation — a maximum elevation change of 534 m.

The land around Porto Nacional is covered by water (46%) and artificial surfaces (25%) within 3 km, grassland (43%) and trees (25%) within 16 km, and trees (44%) and grassland (38%) within 80 km.

3 km
69 m
16 km
386 m
80 km
534 m
treesshrubsgrasslandcroplandartificial surfaceswaterwetland
October weather nearby: Palmas 61 km · Paraíso do Tocantins 77 km · Miracema do Tocantins 127 km · Lagoa da Confusão 132 km · Gurupi 134 km · Formoso do Araguaia 171 km · Dianópolis 202 km · Guaraí 209 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 Nacional (-10.7081°, -48.4172°, elevation 231 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).