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Porto Alegre
Porto Alegre · Rio Grande do Sul Good time to visit Spring Shoulder season

Porto Alegre in September

Short answer

In September, Porto Alegre averages highs of 22.8 °C (73 °F) and lows of 13.3 °C (56 °F), with about 147.8 mm of rain spread over roughly 9.5 days. September has moderate rainfall, usually in quick showers that do not spoil the whole day. Crowds tend to be moderate this month.

Climate · INMET (updated 2026)
Most reviewed activity in Porto AlegrePorto Alegre Airport – City of Gramado Transport★ 8.3 · 14 reviews · from US$ 27 · via CivitatisSee dates and price →
Temperature
22.8 / 13.3 °C
high / low
Rain
147.8 mm
9.5 days
Daylight
11h55
sunset at 18:17
Crowds
Moderate
1 public holiday

What to expect in Porto Alegre in September

Myllena Vieira, editor at Visite
Editor's tip

September is spring in Porto Alegre. In Brazil the seasons are the reverse of those in the Northern Hemisphere. Temperatures are pleasant, with highs of 22.8 °C (73 °F) and nights that still call for a light jacket. Crowds sit somewhere in the middle, with peaks on public holidays. Outside those dates, you can enjoy the place at an easy pace and spend less. Rain, when it comes, is usually brief and does not spoil the day. If the dates line up, it is worth fitting Farroupilha Camp (Acampamento Farroupilha) into your itinerary: it is what livens up the destination at that time of year.

Myllena Vieira · Editor at Visite
Crowds
Crowd level: moderate

Moderate crowds, with peaks on public holidays. Outside those dates, you can enjoy the place at a calmer pace.

Prices
Rates: moderate · ~R$ 423

Moderate prices outside public holidays, which push rates and crowds up. The average nightly rate for lodging in Porto Alegre is around R$ 423 (Brazilian reais), depending on the date.

Tours and tickets

Things to do in Porto Alegre in September

booking on Civitatis
Porto Alegre Airport – City of Gramado Transport
8.3· 14 reviews

Porto Alegre Airport – City of Gramado Transport

This airport transfer is the best solution to get from Porto Alegre airport to Gramado. A vehicle will be waiting to take you to your hotel.

3 h
from US$ 27
Book →
Best of Porto Alegre Tour
10· 6 reviews

Best of Porto Alegre Tour

On this tour of Porto Alegre, we'll get to know the main historical & cultural attractions of the city and enjoy the sunset at Cais Embarcadero.

9 h 30 min
from US$ 99
Book →
Porto Alegre Guided Tour
10· 4 reviews

Porto Alegre Guided Tour

On this guided tour of Porto Alegre, get to know the city's history & visit emblematic areas like Esquina Democrática & Praça Alfândega.

2 h
from US$ 37
Book →
Porto Alegre Bike Tour
6· 2 reviews

Porto Alegre Bike Tour

On this bike tour around Porto Alegre, we'll get to know the city in a unique way while getting some exercise - a great way to explore the city!

2 h
from US$ 12
Book →
Porto Alegre Airport – City of Canela Transport

Porto Alegre Airport – City of Canela Transport

If you arrive at the Porto Alegre airport and plan to go to Canela, this airport transfer service is the most comfortable way to travel between the two cities.

3 h
from US$ 25
Book →
See all activities in Porto Alegre
Where to stay

Hotels in Porto Alegre

In September, demand in Porto Alegre is moderate: most hotels have room, but public holidays fill them up. Compare rates and book a few weeks ahead.

Intercity Porto Alegre Praia de Belas in Porto Alegre 9.2 ★★★★ · 26 reviews Intercity Porto Alegre Praia de Belas See on Booking → Hotel Moov Porto Alegre in Porto Alegre 8.8 ★★★ · 36 reviews Hotel Moov Porto Alegre See on Booking → Hotel Continental Business - 200 metros do Complexo Hospitalar Santa Casa in Porto Alegre 8.6 ★★★ · 15 reviews Hotel Continental Business - 200 metros do Complexo Hospitalar Santa Casa See on Booking → Intercity Porto Alegre Cidade Baixa in Porto Alegre 8.2 ★★★★ · 47 reviews Intercity Porto Alegre Cidade Baixa See on Booking →
See all hotels in Porto Alegre

Rates change with the dates: confirm the price on Booking.com.

What happens in September

Farroupilha Camp (Acampamento Farroupilha)
At Parque Harmonia, the biggest gaúcho (Rio Grande do Sul) tradition festival brings together piquetes (camp sites), chimarrão (traditional mate tea), music and country food around Farroupilha Week.
Public holidays in September: Independence Day (07/09). Expect more people and higher prices around these dates.

What to pack in September

Light jacket for the evening · nights of 13.3 °C (56 °F) Rain jacket or umbrella · 9.5 days of rain in the month Comfortable walking shoes · you will be on foot much of the day
Looking for better weather?

Where the weather is good in September

These destinations have the best weather comfort for September, scored with the same calculation of rain, heat and humidity. Tap to see what the month is like in each one.

Diamantina 86
Diamantina
Minas Gerais · see September →
Belo Horizonte 79
Belo Horizonte
Minas Gerais · see September →
Brumadinho 79
Brumadinho
Minas Gerais · see September →
Mariana 79
Mariana
Minas Gerais · see September →
See all destinations by month

Torn between Porto Alegre and another destination?

See Porto Alegre next to the destinations that usually compete for the same trip: month-by-month weather, driving cost, ideal length of stay and travel style, side by side.

Porto Alegre or Arraial do Cabo? Porto Alegre or Balneário Camboriú? Porto Alegre or Belo Horizonte?
see all comparisons →

Questions about Porto Alegre in September

What is the weather like in Porto Alegre in September?
In September, Porto Alegre averages highs of 22.8 °C (73 °F) and lows of 13.3 °C (56 °F), with about 147.8 mm of rain spread over roughly 9.5 days. September has moderate rainfall, usually in quick showers that do not spoil the whole day. Crowds tend to be moderate this month.
Does it rain a lot in Porto Alegre in September?
In September, Porto Alegre gets about 147.8 mm of rain spread over around 9.5 rainy days, in line with the average rainfall for the year. Rain tends to come in quick showers that do not ruin the day.
Is September high season in Porto Alegre?
Crowds in September tend to be moderate. Moderate prices outside public holidays, which push rates and crowds up.
What is happening in Porto Alegre in September?
September brings Farroupilha Camp (Acampamento Farroupilha). Confirm the dates and book early if they overlap with your trip.
Does it usually rain all day in Porto Alegre in September?
INMET's climate normals record the number of rainy days and the total millimeters, not the hours of each day, so they do not say how long the rain lasts. What they show for Porto Alegre in September: 9.5 rainy days in a month of 30 days (about 32% of the days) and 147.8 mm over the month, which works out to an average of about 16 mm per rainy day. Compared with the rest of the year, September falls within the destination's average rainfall. Rain tends to come in showers, but it is smart to have an indoor backup plan.
What is the temperature in Porto Alegre in September, and what should you pack?
According to INMET's climate normals, the average high in Porto Alegre in September is 22.8 °C and the average low is 13.3 °C, with air humidity of around 77.4%. Compared with the rest of the year, September is among the coolest months at the destination. For your suitcase, here is what those numbers call for: light jacket for the evening; rain jacket or umbrella; comfortable walking shoes.
Is Porto Alegre worth visiting in September?
Good time to visit. On our weather comfort index, which weighs rain, heat and humidity from INMET's climate normals, September scores 57 out of 100 and ranks No. 7 among the 12 months. The most comfortable month is November (66) and the least comfortable is July (48). As for crowds, in September they tend to be moderate.
August see the full year October