Buenos Aires weather
in September
“Mild and bright — an underrated time to visit.”
Roughly 6 rainy days across the month, on average.
In september, Buenos Aires settles into its kind, mild rhythm. The city keeps a different pulse than in summer or midwinter, and travellers who arrive with the right expectations are rewarded.
Days average around 18°C (65°F), cooling to 11°C after sunset. Rainfall is moderate — around 6 rainy days spread through the month. Long days of sunshine reward early starts.
These figures are climatological averages, drawn from a decade of daily records via the Open-Meteo Archive — not a forecast. But they are honest, and they are the sort of thing a good travel guide ought to tell you before you book the flight.
What to pack for Buenos Aires in September
- •A light layer for cool mornings and evenings
- •A compact travel umbrella — one you'll actually carry
- •Comfortable, broken-in walking shoes
- •A small daypack that won't look like a tourist beacon
What to pack for Buenos Aires in September
- →Breathable travel pantsAmazon · shop this
- →Compact travel umbrellaAmazon · shop this
- →Reef-safe sunscreen SPF 50Amazon · shop this
- →Polarized sunglassesAmazon · shop this
- →Universal travel adapterAmazon · shop this
- →Compression packing cubesAmazon · shop this
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Where to stay in Buenos Aires
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Compare hotels on Booking.com→Other places with a similar climate right now
Buenos Aires in September — FAQ
Q01Is September a good time to visit Buenos Aires?
Is September a good time to visit Buenos Aires?
Yes — it is a good time to visit, with pleasant, comfortable weather. In September, Buenos Aires averages a high of 18°C (65°F) and a low of 11°C (52°F), with 70mm of rainfall across roughly 6 rainy days.
Q02What is the average temperature in Buenos Aires in September?
What is the average temperature in Buenos Aires in September?
The average high temperature in Buenos Aires during September is 18°C (65°F), with an average low of 11°C (52°F). These figures are averaged from ten years of daily records (2015–2024, Open-Meteo Archive).
Q03How many rainy days does Buenos Aires have in September?
How many rainy days does Buenos Aires have in September?
Buenos Aires averages approximately 6 rainy days in September, with a total monthly rainfall of about 70mm. This is based on daily precipitation records where days with 1mm or more of rain are counted as rainy days.
Q04What should I pack for Buenos Aires in September?
What should I pack for Buenos Aires in September?
For Buenos Aires in September, pack layered clothing for changing temperatures, a compact umbrella or waterproof jacket, comfortable walking shoes. These recommendations are based on the ten-year weather averages for this specific month.
Q05How crowded is Buenos Aires in September?
How crowded is Buenos Aires in September?
Tourist crowds in Buenos Aires during September are typically moderate — shoulder season, a sweet spot between crowds and weather. Consider this when planning accommodation — prices track crowd levels closely.