Month guide · Buenos Aires · Argentina
Buenos Aires in September
What September is really like in Buenos Aires: weather, crowds, prices, events and what to pack.
Updated By the AMZBooking editorial team
Photo: Carlos Zito, CC BY-SA 3.0
Quick answer
September is a good-value shoulder-season month. Expect average highs of 19°C (66°F), lows of 11°C (52°F), about 7 rainy days and roughly 11.9 hours of daylight. Spring arrives with mild weather, blossom in the parks and moderate hotel prices.
Key facts
- Average high / low
- 19°C (66°F) / 11°C (52°F)
- Rainy days
- About 7
- Daylight
- About 11.9 hours
- Crowds
- Quiet
- Hotel prices
- Low
Weather in September
September is the 9th-warmest month in Buenos Aires: days average 19°C (66°F) against a yearly average high of 22°C (72°F), and nights fall to about 11°C (52°F). Rain falls on roughly 7 of its 30 days. Compared with August (17°C (63°F)), September is warmer; by October highs climb to around 22°C (72°F).
- Sunrise (15 September)
- About 06:53
- Sunset (15 September)
- About 18:44
- Daylight
- About 11.9 hours
Summer (December–February). Hot and humid with highs around 30°C, long evenings outdoors and a quieter city in January, when many locals head to the coast.
Crowds and prices
On a 1–5 scale, September rates 2 for crowds (the peak is February at 3) and 2 for hotel prices (highest in November). That makes September one of the better-value months to book.
Events in September
- Buenos Aires Marathon (usually September)
Dates move from year to year. Check the organiser’s site before booking travel around an event.
What to do in September
Mild, settled days suit walking, viewpoints and time outdoors.
Architecture · Monserrat
Palacio Barolo
Choose an evening tour to see the lighthouse lit and the city at dusk.
- Time needed
- 1–1.5 hours
- Cost
- Mid-priced
- Architecture
- Views
- History
- Off the beaten path
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Historic site · Recoleta
Recoleta Cemetery
Opened in 1822, this walled city of the dead holds more than 4,600 vaults along tree-lined alleys, from marble temples to Art Nouveau chapels.
- Time needed
- 1.5–2 hours
- Cost
- Low cost
- Iconic
- History
- Architecture
- Photo spot
Landmark · Monserrat
Plaza de Mayo and Casa Rosada
Start here and walk west along Avenida de Mayo past Café Tortoni and Palacio Barolo to the Congress building.
- Time needed
- 1–2 hours
- Cost
- Free
- Iconic
- History
- Free
- Architecture
Architecture · San Nicolás
Teatro Colón
Opened in 1908, the Colón is one of the world's great opera houses, famed for its acoustics, its gilded horseshoe auditorium and Raúl Soldi's painted dome.
- Time needed
- 1 hour for a tour
- Cost
- Mid-priced
- Iconic
- Architecture
- History
- Rainy day
- After dark
What to pack
For highs near 19°C, lows near 11°C and 7 wet days: layers, a warm sweater and a jacket for cool evenings; a packable rain jacket for showers; comfortable walking shoes.
Is September a good time to visit Buenos Aires?
A good-value shoulder-season month, with a notable event on the calendar. If your dates are flexible, March–May and October–November are better overall. Compare every month.
Buenos Aires in other months
Questions travellers ask
+Is September a good time to visit Buenos Aires?
It is a good-value shoulder-season month. Spring arrives with mild weather, blossom in the parks and moderate hotel prices.
+How warm is Buenos Aires in September?
Average highs are around 19°C (66°F) and lows around 11°C (52°F).
+Does it rain a lot in Buenos Aires in September?
Expect rain on about 7 days of the month.