Portão weather in May

In May, Portão sees average daytime highs of 22°C and overnight lows near 13°C, with 120 mm of rain across 9.9 wet days and about 10.5 hours of daylight. It is the 9th-warmest and 11th-wettest month of the year here.

Highs ease over the month, from about 23°C in the first days to 20°C by the end. The sky is clear or mostly clear about 30% of the time in May, and the air most often feels dry.

Daylight stretches from about 10 h 54 min at the start of May to 10 h 18 min by month's end. Set against the rest of the year, May is Portão's 9th-clearest and 12th-windiest month. For the whole year in context, see Portão's year-round climate.

Daytime high
22°
9th warmest
Overnight low
13°
5th coldest
Rainfall
120 mm
9.9 wet days
Daylight
10 h 30 min
8:06 AM – 6:37 PM
Cloud cover
60%
9th clearest
Wind
8 km/h
12th windiest
Solar energy
2.84 kWh/m²
Travel score
6.6
out of 10

Portão is human settlement in Brazil.

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 23°C in the first days to 20°C by the end.

A typical May day in Portão reaches about 22°C in the afternoon and slips back to 13°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 27°C. Set against its neighbours, May runs about 4°C cooler than April and about 2°C warmer than June.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12314
22314
32314
42314
52314
62314
72314
82314
92213
102213
112213
122213
132213
142213
152213
162213
172113
182113
192113
202112
212112
222112
232112
242112
252112
262112
272012
282012
292012
302011
312011

Portão weather by month

How May compares with the rest of the year at a glance. May is the 9th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 20°16514.813.74.6
Feb29° / 20°14113.913.14.7
Mar28° / 19°12812.912.25.7
Apr25° / 16°1181011.36.8
May22° / 13°1209.910.56.6
Jun20° / 11°12410.210.16.1
Jul19° / 10°15510.510.36.1
Aug21° / 11°13010.510.96.5
Sep22° / 13°1601211.86.3
Oct24° / 15°19413.812.76.2
Nov27° / 17°13912.113.56.2
Dec29° / 19°14513.113.95.2

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 16% of May, with mostly cloudy or overcast conditions the remaining 54%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14852
24852
34753
44951
54951
64852
74852
84753
94753
104753
114753
124753
134753
144654
154654
164753
174654
184654
194654
204654
214654
224654
234555
244555
254555
264456
274555
284456
294456
304357
314258

Chance of precipitation in May

Any precipitation

Portão gets around 120 mm of rain over 9.9 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 31% and peaks near 33% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
133
232
332
432
532
632
733
833
933
1032
1132
1232
1332
1432
1532
1632
1732
1832
1931
2031
2131
2231
2330
2430
2530
2630
2730
2830
2930
3030
3130

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the dry band about 39% of days. Sticky, muggy-or-worse air turns up on roughly 7% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1262630162
2272630151
3282729151
4292729141
5292829131
6302929121
7312928111
8313028100
932312890
1032312790
1133322780
1234322770
1334322670
1435332660
1536332660
1636332560
1737322550
1839322450
1940312450
2041312350
2143302340
2244302240
2346292240
2447282140
2548282040
2650272030
2751271930
2852271830
2953261830
3054261730
3154261730

Wind in May

Winds average 8 km/h in May, the calmest month.

Across May, daily wind ranges from about 8 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 10 h 54 min at the start of May to 10 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 36 minutes over May. Sunrise moves from 7:56 AM to 8:15 AM, and sunset from 6:48 PM to 6:30 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.97:566:48
210.87:576:47
310.87:576:46
410.87:586:46
510.87:596:45
610.77:596:44
710.78:006:43
810.78:016:42
910.78:016:41
1010.68:026:41
1110.68:036:40
1210.68:036:39
1310.68:046:39
1410.68:056:38
1510.58:056:37
1610.58:066:37
1710.58:066:36
1810.58:076:35
1910.58:086:35
2010.48:086:34
2110.48:096:34
2210.48:106:33
2310.48:106:33
2410.48:116:32
2510.38:116:32
2610.38:126:32
2710.38:136:31
2810.38:136:31
2910.38:146:30
3010.38:146:30
3110.38:156:30

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 2.84 kWh/m².

For context, solar energy here swings from a low near 2.39 kWh/m² to a high of 6.47 kWh/m² in December across the year — May's 2.84 kWh/m² sits near the bottom.

01234151015202531
Solar energy (kWh/m²)Level
13.2Moderate
23.2Moderate
33.2Moderate
43.2Moderate
53.1Moderate
63.1Moderate
73.1Moderate
83.0Moderate
93.0Moderate
103.0Moderate
113.0Moderate
122.9Moderate
132.9Moderate
142.9Moderate
152.9Moderate
162.8Moderate
172.8Moderate
182.8Moderate
192.8Moderate
202.7Moderate
212.7Moderate
222.7Moderate
232.7Moderate
242.7Moderate
252.6Moderate
262.6Moderate
272.6Moderate
282.6Moderate
292.6Moderate
302.6Moderate
312.5Moderate
Planning a trip in May

Is May a good time to visit Portão?

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

6.6
Sightseeing
2nd-best month of the year
4.4
Beach & pool
9th-best month of the year

May is a reasonable time to visit Portão for sightseeing.

What to pack for Portão in May

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

In May, Portão sees daytime highs around 22°C and nights near 13°C. Worth packing: rain gear. About 10 days see rain.

rain gear

UV index in Portão in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Portão peaks around January 16 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 20 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateHighVery highExtremeJan 16UV 13Jun 20UV 4
UV index (midday)Level
Jan13Extreme
Feb12Extreme
Mar10Very high
Apr8Very high
May5Moderate
Jun4Moderate
Jul4Moderate
Aug5High
Sep8Very high
Oct8Very high
Nov12Extreme
Dec13Extreme

Air quality in Portão 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 Portão is worst in August — around 27 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (December, 13 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateAug 1327 µg/m³Dec 2213 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb13Moderate
Mar15Moderate
Apr18Moderate
May21Moderate
Jun23Moderate
Jul25Moderate
Aug27Moderate
Sep23Moderate
Oct16Moderate
Nov15Moderate
Dec13Moderate
Location & terrain

Where is Portão?

Portão sits at 29.7°S, 51.2°W, 49 m above sea level, in Brazil. The nearest listed city is Estância Velha, 9.0 km away.

Topography around Portão

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

Within 3 km, the terrain around Portão has only modest variations in elevation — a maximum elevation change of 120 m around an average of 47 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 449 m; within 80 km, large variations in elevation — a maximum elevation change of 986 m.

The land around Portão is covered by trees (42%) and grassland (34%) within 3 km, trees (52%) and grassland (25%) within 16 km, and trees (57%) and grassland (22%) within 80 km.

3 km
120 m
16 km
449 m
80 km
986 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
May weather nearby: Estância Velha 9.0 km · Novo Hamburgo 11 km · São Leopoldo 11 km · Ivoti 15 km · Sapucaia do Sul 16 km · Nova Santa Rita 17 km · São Sebastião do Caí 18 km · Campo Bom 18 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 Portão (-29.7017°, -51.2419°, elevation 49 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).