Portão in Spring

In spring (September, October and November), Portão sees average daytime highs around 24°C and overnight lows near 15°C, with 493 mm of rain over about 38 wet days across the season. It is the 3rd-warmest season and the wettest season of the year.

Over the season highs climb from about 22°C in early September to 28°C by late November. The sky is clear or mostly clear about 29% of the time across spring, and the air most often feels humid.

Spring is Portão's 2nd-best season to visit on our travel score. For the whole year in context, see Portão's year-round climate.

Avg daytime high: 24°C; 3rd-warmest season
Avg overnight low: 15°C
Rainfall: 493 mm; 38 wet days
Avg wind: 9 km/h
Travel score: 6.2; 2nd-best season
Months: Sep · Oct · Nov

← Winter Portão year-round climate Summer →

Spring Summer Fall Winter

Temperature in Portão in Spring

Average highAverage lowShaded bands: 10–90% of days

Over the season highs climb from about 22°C in early September to 28°C by late November.

A typical spring day in Portão reaches about 24°C and drops to 15°C overnight. The warmest of the three months is November, the coolest September.

Portão weather by month

How the three spring months (September, October and November) compare with the rest of the year — the season's months are highlighted.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	30° / 20°	165	14.8	13.7	4.6
Feb	29° / 20°	141	13.9	13.1	4.7
Mar	28° / 19°	128	12.9	12.2	5.7
Apr	25° / 16°	118	10	11.3	6.8
May	22° / 13°	120	9.9	10.5	6.6
Jun	20° / 11°	124	10.2	10.1	6.1
Jul	19° / 10°	155	10.5	10.3	6.1
Aug	21° / 11°	130	10.5	10.9	6.5
Sep	22° / 13°	160	12	11.8	6.3
Oct	24° / 15°	194	13.8	12.7	6.2
Nov	27° / 17°	139	12.1	13.5	6.2
Dec	29° / 19°	145	13.1	13.9	5.2

Cloud cover in Spring

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 29% of the time across spring.

Chance of precipitation in Spring

Any precipitation

Portão gets around 493 mm of rain over 38 wet days across spring. The line is the day-by-day chance of measurable precipitation.

Humidity in Spring

DryComfortableHumidMuggyOppressiveMiserable

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

Wind in Spring

Winds average 9 km/h across spring.

Sunrise & sunset in Spring

DaylightNight

Daylight runs from about 11 h 24 min in early September to 13 h 48 min by late November. The lit band spans sunrise to sunset each day.

Solar energy in Spring

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day across spring, about 5.0 kWh/m².

Planning a trip in spring

Is spring a good time to visit Portão?

Our two travel scores rate spring for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.

6.2

Sightseeing

2nd-best month of the year

5.4

Beach & pool

3rd-best month of the year

spring is a reasonable time to visit Portão for sightseeing.

What to pack for Portão in Spring

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

In spring, Portão sees daytime highs around 24°C and nights near 15°C. Pack sun protection. Worth having: light clothes and rain gear. About 38 days see rain.

sun protectionlight clothesrain gear

UV index in Portão in Spring

LowModerateHighVery highExtreme

Clear-sky midday UV across spring averages around 9 (very high — sun protection essential). 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.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	13	12	10	8	5	4	4	5	8	8	12	13
Level	Extreme	Extreme	Very high	Very high	Moderate	Moderate	Moderate	High	Very high	Very high	Extreme	Extreme

	UV index (midday)	Level
Jan	13	Extreme
Feb	12	Extreme
Mar	10	Very high
Apr	8	Very high
May	5	Moderate
Jun	4	Moderate
Jul	4	Moderate
Aug	5	High
Sep	8	Very high
Oct	8	Very high
Nov	12	Extreme
Dec	13	Extreme

Air quality in Portão in Spring

GoodModeratePoorUnhealthyVery unhealthy

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	13	13	15	18	21	23	25	27	23	16	15	13
Level	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	13	Moderate
Feb	13	Moderate
Mar	15	Moderate
Apr	18	Moderate
May	21	Moderate
Jun	23	Moderate
Jul	25	Moderate
Aug	27	Moderate
Sep	23	Moderate
Oct	16	Moderate
Nov	15	Moderate
Dec	13	Moderate

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

trees 42%

16 km

449 m

trees 52%

80 km

986 m

trees 57%

treesgrasslandcroplandartificial surfacesbare terrainwaterwetland

← Winter Portão year-round climate Summer →

Spring 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

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.