The month in detail
What to expect in September
Spring marks the start of the good season in Buenos Aires. Temperatures rise (18°C) and tourists have not yet arrived en masse. Rain risk remains low (16% of days), leaving good room for outdoor activities. Not the best window, but acceptable if dates are constrained. January (8.9/10) is significantly better if possible.
September ranks 8 out of 12 months in Buenos Aires. Compared to August: +2°C daytime, +0.5h of sun per day.
This month's conditions
What it's like in September
UV index
6 · high
sunscreen and hat advised
Feels like
dry air
9°
Sea
14°C
cold, for the brave
Daylight
11.8h of daylight
Air quality
good
AQI 23
Compare
Is September the right month?
The best month in Buenos Aires is January (8.9/10), 1.5 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 · Buenos Aires
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Activities
Tours, tickets, experiences
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Flights
Multi-airline comparator
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🎟️ Activities & tours · Buenos Aires
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 beach holiday.
Country · Argentina
🗣️LanguageSpanish
💶CurrencyArgentine Peso ($)
🚗DrivingRight-hand
🛡️Safety ⓘVery safe · 1/5
💰Cost of living ⓘCheap · 2/5
🌡️ Climate
🌍Climate typeTemperate oceanic
📈Climate trend ⓘStable
🔥Hottest monthJanuary · 28°C
❄️Coolest monthJune · 14°C
🌧️Rainiest month ⓘMarch · 23%
🏖️ Beach holiday
📅Peak seasonJuin → Sept
🏖️Swell (Sept–Mar) ⓘModérée
Explore
Other destinations in September
If September doesn't convince you for this destination, compare with others.
Location
Where is Buenos Aires ?
Global position + regional geographic context.
🌍 World
🔍 Geographic context
ArgentinaTemperate oceanic climate with a 8.9 → 4.4 gap between best and worst month. 10 years of ERA5 data to choose by project.
34.61°S · 58.38°W
Questions
Frequently asked questions
What is the best time to visit Buenos Aires?
January is the best month with 28.0°C highs, 21.0°C lows, 8.8h of sunshine and 19.0% rainy days. The months of January & February offer comparable conditions.
How many hours of sunshine does Buenos Aires get in January?
Buenos Aires averages 8.8 sunshine hours per day in January. It is the sunniest month with a climate score of 8.5/10.
What is the rainiest month in Buenos Aires?
June is the most unfavourable month with June has the lowest climate score of the year and the lowest climate score of the year.
What are the temperatures at night in Buenos Aires in January?
In January, overnight lows reach 21.0°C, while afternoon highs average 28.0°C.
Is Buenos Aires good in winter?
In winter (December-February), Buenos Aires scores 8.4/10 on average — Decent period conditions for cultural visits.. The best month overall remains January with a score of 8.5/10.
When should you avoid Buenos Aires?
June is the most difficult month to visit Buenos Aires, with June has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.
Can you swim in Buenos Aires in September?
In September, the sea averages 14°C in Buenos Aires: cold, for the brave. Best left to hardened swimmers or those with a wetsuit.
Do you need sun protection in Buenos Aires in September?
The average UV index reaches 6 in September in Buenos Aires (high), with about 11.8h of daylight. Sunscreen and hat advised.