Porto Nacional weather in May

In May, Porto Nacional sees average daytime highs of 32°C and overnight lows near 23°C, with 36 mm of rain across 5.9 wet days and about 11.5 hours of daylight. It is the 6th-warmest and 8th-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 37% of the time in May, and the air most often feels muggy.

Daylight stretches from about 11 h 36 min at the start of May to 11 h 24 min by month's end. Set against the rest of the year, May is Porto Nacional's 5th-clearest and 5th-windiest month. For the whole year in context, see Porto Nacional's year-round climate.

Daytime high
32°
6th warmest
Overnight low
23°
7th coldest
Rainfall
36 mm
5.9 wet days
Daylight
11 h 30 min
6:25 AM – 5:55 PM
Cloud cover
55%
5th clearest
Wind
6 km/h
5th windiest
Solar energy
4.96 kWh/m²
Travel score
4.2
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

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

A typical May day in Porto Nacional reaches about 32°C in the afternoon and slips back to 23°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 34°C. Set against its neighbours, May runs about 1°C warmer than April and on par with June.

20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
13223
23223
33223
43223
53223
63223
73223
83223
93223
103223
113223
123223
133223
143223
153223
163223
173223
183223
193323
203323
213323
223322
233322
243322
253322
263322
273322
283322
293322
303322
313322

How May really feels in Porto Nacional

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

Porto Nacional weather by month

How May compares with the rest of the year at a glance. May is the 6th-warmest and 8th-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 May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 37% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 19% of May, with mostly cloudy or overcast conditions the remaining 44%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14555
24555
34555
44654
54654
64753
74753
84852
94951
105050
115149
125248
135347
145446
155446
165545
175644
185743
195842
205842
216040
226139
236238
246337
256436
266634
276634
286832
296931
307030
317129

Chance of precipitation in May

Any precipitation

Porto Nacional gets around 36 mm of rain over 5.9 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 19% and peaks near 35% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
135
233
332
431
529
628
726
825
924
1023
1122
1220
1319
1418
1518
1617
1716
1815
1915
2015
2114
2214
2313
2413
2512
2612
2711
2810
2910
309
318

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the muggy band about 47% of days. Sticky, muggy-or-worse air turns up on roughly 88% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
10231661
20233650
30234640
40335620
50337600
60339580
70440560
80442540
90444520
100545500
110547480
120648460
130649440
140751420
150851410
160853390
170953380
1801054360
1901154350
2001254340
2101355320
2201554310
2311753290
2411952280
2512152260
2612351250
2712650230
2812850210
2913049190
3013348180
3113547160

Wind in May

Winds average 6 km/h in May.

Across May, daily wind ranges from about 5 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
15calm
25calm
35calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 11 h 36 min at the start of May to 11 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over May. Sunrise moves from 6:22 AM to 6:28 AM, and sunset from 6:00 PM to 5:54 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.66:226:00
211.66:225:59
311.66:225:59
411.66:225:59
511.66:235:58
611.66:235:58
711.66:235:58
811.66:235:57
911.66:235:57
1011.66:235:57
1111.56:245:56
1211.56:245:56
1311.56:245:56
1411.56:245:56
1511.56:245:55
1611.56:255:55
1711.56:255:55
1811.56:255:55
1911.56:255:55
2011.56:265:55
2111.56:265:54
2211.56:265:54
2311.56:265:54
2411.56:265:54
2511.56:275:54
2611.46:275:54
2711.46:275:54
2811.46:285:54
2911.46:285:54
3011.46:285:54
3111.46:285:54

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.96 kWh/m² — the year's lowest.

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 — May's 4.96 kWh/m² sits near the bottom.

0246151015202531
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.0Bright
45.0Bright
55.0Bright
65.0Bright
75.0Bright
85.0Bright
95.0Bright
105.0Bright
115.0Bright
125.0Bright
135.0Bright
145.0Bright
155.0Bright
165.0Bright
175.0Bright
185.0Bright
195.0Bright
205.0Bright
215.0Bright
225.0Bright
235.0Bright
245.0Bright
255.0Bright
265.0Bright
275.0Bright
285.0Bright
295.0Bright
305.0Bright
315.0Bright
Planning a trip in May

Hazard calendar for Porto Nacional

In seasonPeak

None of Porto Nacional's seasonal hazards are active in May. 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 May a good time to visit Porto Nacional?

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

4.2
Sightseeing
3rd-best month of the year
7.0
Beach & pool
4th-best month of the year

May is a reasonable time to visit Porto Nacional for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Porto Nacional in May

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

In May, Porto Nacional sees daytime highs around 32°C and nights near 23°C. Pack light clothes. Worth having: sun protection. About 6 days see rain.

light clothessun protection

UV index in Porto Nacional in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May 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 May

GoodModeratePoorUnhealthyVery unhealthy

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