The month in detail
What to expect in September
Spring marks the start of the good season in Porto Alegre. Temperatures rise (22°C) and tourists have not yet arrived en masse. Expect rain on 32% of days — a light raincoat in the bag is recommended. A good balance between weather and crowds, even if December (8.5/10) remains theoretically better.
September ranks 6 out of 12 months in Porto Alegre.
This month's conditions
What it's like in September
UV index
6 · high
sunscreen and hat advised
Feels like
comfortable
14°
Daylight
11.8h of daylight
Air quality
fair
AQI 43
Compare
Is September the right month?
The best month in Porto Alegre is December (8.5/10), 0.9 pt higher than September.
Book
Plan your trip
Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.
Stay
Hotels & rentals · Porto Alegre
Expedia →
Activities
Tours, tickets, experiences
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Flights
Multi-airline comparator
Kiwi →
🎟️ Activities & tours · Porto Alegre
GetYourGuide selection · free cancellation
Practical info
What you need to know before you go
Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a city break.
Country · Brazil
🗣️LanguagePortuguese
💶CurrencyBrazilian Real (R$)
🚗DrivingRight-hand
🛡️Safety ⓘVery safe · 1/5
💰Cost of living ⓘCheap · 2/5
🌡️ Climate
🌍Climate typeTemperate
📈Climate trend ⓘStable
🔥Hottest monthJanuary · 30°C
❄️Coolest monthJune · 19°C
🌧️Rainiest month ⓘFebruary · 32%
🏛️ City break
📅Tourist peak seasonJune → August
☔Indoor sights ⓘYear-round
🚇Public transportGood
Explore
Other destinations in September
If September doesn't convince you for this destination, compare with others.
Similar climate
Punta del EsteUruguayMontevideoUruguayUruguayUruguay
SydneyAustraliaMelbourneAustralia
Location
Where is Porto Alegre ?
Global position + regional geographic context.
🌍 World
🔍 Geographic context
BrazilTemperate climate with a 8.5 → 5.5 gap between best and worst month. 10 years of ERA5 data to choose by project.
30.03°S · 51.22°W
Questions
Frequently asked questions
What is the best time to visit Porto Alegre?
March is the best month with 28.0°C highs, 20.0°C lows, 6.7h of sunshine and 28.0% rainy days. The months of March & December offer comparable conditions.
How many hours of sunshine does Porto Alegre get in March?
Porto Alegre averages 6.7 sunshine hours per day in March. It is the sunniest month with a climate score of 7.9/10.
What is the rainiest month in Porto Alegre?
February is the most unfavourable month with February has the lowest climate score of the year and the lowest climate score of the year.
What are the temperatures at night in Porto Alegre in March?
In March, overnight lows reach 20.0°C, while afternoon highs average 28.0°C.
Is Porto Alegre good in winter?
In winter (December-February), Porto Alegre scores 6.2/10 on average — Decent period conditions for cultural visits.. The best month overall remains March with a score of 7.9/10.
When should you avoid Porto Alegre?
February is the most difficult month to visit Porto Alegre, with February has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.
Do you need sun protection in Porto Alegre in September?
The average UV index reaches 6 in September in Porto Alegre (high), with about 11.8h of daylight. Sunscreen and hat advised.