Weather in Buenos Aires in September
September in Buenos Aires is mild enough that walking is the default. This is a city-break month more than a sea-holiday month.
In Argentina, this is how Buenos Aires actually wears September, not how a country centroid would. Compared with January and July, September sits in the middle of Buenos Aires's year.
- Average temp
- 15°C
11–18°C
- Rainfall
- 58 mm
Showers likely
- Sunshine
- 6.3 h
hours per day
What to expect
Daytime
Mild afternoons in Buenos Aires are the prize in September. You can eat outside on the good days. You still want something for the breeze.
This is walking weather. Shade is useful, not essential the way it is in the hot months. A long outdoor day is a reasonable plan.
Rain
Mixed skies in Buenos Aires in September. Dry days and wet days share the month. Outdoor plans need a backup, not a cancellation policy.
Pack a shell you will actually carry. The monthly table is the place for totals. This is the feel: usable, interrupted.
Evening
Evenings are cooler. A layer helps after sunset.
What to pack
Rain jacket
A layer for cooler evenings
Where to stay in Buenos Aires
Dates are a starting point for September.
Travel guides for Buenos Aires
What to read before you book.
Average weather in Buenos Aires
TemperatureRainfall
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FAQs about Buenos Aires
Climate averages for Buenos Aires, 1991–2020.
The best time to visit Buenos Aires is between February and April, the most comfortable stretch of the year on these averages.
January is the hottest month, with an average around 25°C.
January is the wettest month, with about 135 mm of rain.
No. These are 1991–2020 climate normals from Meteostat, not a live forecast. Actual weather in any given week can differ.
