Buenos Aires in September
sweet spot · one of the best months to go
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The numbers
| Daily high | 19°C |
|---|---|
| Nightly low | 10°C |
| Feels like, afternoon | 18°C |
| Rainy days | 5 · 74 mm |
| Humidity | 73% |
| Sunshine | 8.9 h/day |
| Daylight | 11.9 h/day |
| Crowds | 100 / 100, higher is quieter |
Ten-year averages for this calendar month. A rainy day is one with at least 2 mm.
What to pack
- Warm layers for the evenings, which drop to about 10°C.
- Sun protection: about 9 hours of sunshine a day.
Each line is a threshold over the ten-year figures above, not advice from anywhere else.
Before you go
| Cost of living | cheap — prices run about 46% of the United States' (World Bank, 2025) |
|---|---|
| Currency | Argentine convertible peso |
| Languages | Spanish |
| Plugs | Type C and I, 220 V |
| Driving | On the right |
| Emergency | 911, 100, 117, 101 |
| Calling code | +54 |
| Travel advice | No advice against travel — UK Foreign Office, updated 2026-05-07 |
Health. Before you travel check that: your destination can provide the healthcare you may need you have appropriate travel insurance for local treatment or unexpected medical evacuation This is particularly important if you have a health condition or are pregnant. Emergency medical number Dial 107 or 911 and ask for an ambulance. Contact your insurance or medical assistance company quickly if you’re refer… More.
Facts from Wikidata (CC0), the UK Foreign Office (Open Government Licence) and the World Bank, refreshed 2026-09-23. The advisory is written for British travellers; entry rules depend on your passport.
September elsewhere
In September from
The other months at Buenos Aires
- January sweet spot
- February sweet spot
- March good
- April good
- May good
- June good
- July ok
- August sweet spot
- September
- October sweet spot
- November sweet spot
- December sweet spot
← August · All twelve months at Buenos Aires · October →
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