What to expect in Buenos Aires in December
December is a strong choice for Buenos Aires: 28° / 18°, with the biggest crowds of the year and prices close to the yearly average.
Buenos Aires weather in December
Typical conditions in Buenos Aires during December, based on long-run climate normals rather than any single year. Treat it as a planning guide, not a forecast.
| Average high | 28°C 82°F |
|---|---|
| Average low | 18°C 64°F |
| Rainfall | Moderate 45/100 |
| Total rainfall | 119 mm4.7 in |
| Rainy days | 9 |
| Daylight | 14 h 27 min |
| How it feels | Warm and comfortable |
Average highs sit around 28°C with lows near 18°C. Rainfall is moderate; the odd shower is likely.
Crowds & demand
Crowd levels are High for Buenos Aires — the biggest crowds of the year.
Prices & value
This month counts as shoulder season: prices close to the yearly average.
What to pack
Light layers for 28°C days and something with sleeves for evenings, which cool to around 18°C.
What it costs
Costs in December sit around the yearly average for Buenos Aires — neither a bargain nor a squeeze. Booking a few weeks out is usually enough.
Who this month suits
- Travellers who want the most reliable weather
- Anyone travelling on a budget
- Families tied to school holidays
Events & what’s on
No major festivals fall in December, so the destination feels like its everyday self.
Buenos Aires in December compared with nearby months
If your dates are flexible by a few weeks, this is what shifting them actually buys you.
| Month | Temp | Crowds | Price | Score |
|---|---|---|---|---|
| October | 21° / 11° | Moderate | $$ | 59 |
| November | 24° / 14° | Moderate | $$ | 60 |
| December · This month | 28° / 18° | High | $$ | 52 |
| January | 30° / 20° | Moderate | $$ | 53 |
| February | 29° / 19° | High | $$ | 51 |
These months score higher for Buenos Aires on the same blend of weather, crowds and price. Same destination, better odds.
Or go somewhere else in December
If the destination is negotiable but the month is not, these places are at their best in December.
Figures are climate normals and modelled estimates — a planning guide, not a forecast. We separate fact, estimate and recommendation. Updated October 2026
