01Weather
Buenos Aires weather in December
Afternoons in December average 28.3 °C (83 °F) and nights cool to 19.3 °C (67 °F). The month brings about 136 mm (5.4 in) of rain spread over roughly 9 days. Compared with November it is 2.6 °C warmer; January is 1.4 °C warmer again.
What the averages hide
| In a typical December | Value | What it means |
|---|---|---|
| Warm afternoons (90th percentile) | 33 °C / 91 °F | one day in ten is at least this warm |
| Cool afternoons (10th percentile) | 24 °C / 75 °F | one day in ten stays below this |
| Cold nights (10th percentile) | 15 °C / 59 °F | one night in ten is colder than this |
| Days above 30 °C (86 °F) | 11.0 | per month, average 2016–2025 |
| Nights at or below 0 °C (32 °F) | 0.0 | frost mornings per month |
| Chance of rain on any given day | 30 % | at least 1 mm |
| Hottest / coldest December day 2016–2025 | 38.0 °C / 10.5 °C | extremes in the ten-year record |
02Daylight
Sunrise, sunset and the length of the day
| Date | Sunrise | Sunset | Daylight |
|---|---|---|---|
| 1 December | 05:33 | 19:51 | 14.3 h |
| 15 December | 05:34 | 20:02 | 14.5 h |
| 31 December | 05:43 | 20:09 | 14.4 h |
Daylight grows by about 6 minutes over the month. Times are local (America/Argentina/Buenos_Aires).
03Crowds
How busy Buenos Aires is in December
busy The main sights are busy in December. What drives it:
- Polo Open finals
- Christmas and New Year
- summer heat begins
04Public holidays
Public holidays in December 2026
| Date | Holiday |
|---|---|
| 8 Dec 2026 | Immaculate Conception Day |
| 25 Dec 2026 | Christmas Day |
On public holidays many shops close and museums run on Sunday hours; check opening times for the day before and after as well.
05Events
What's on in Buenos Aires in December
Every year in December
| Event | When | Type |
|---|---|---|
| Nochebuena and Año Nuevo | 24 and 31 December, fireworks at midnight | seasonal |
07Packing
What to pack for Buenos Aires in December
- light, breathable clothing
- sun hat and sunscreen
- refillable water bottle
- a compact umbrella or hooded rain jacket, rain falls on roughly one day in three
- something for heat: 11 days a month pass 30 °C on average
08Editor's notes
What the numbers don't tell you
December turns hot and humid, with afternoons around 28 °C, the Polo Open finals in the first week and Christmas Eve and New Year's Eve celebrated at midnight with family dinners and fireworks across the city, with the 25th and 1 January very quiet. Late December already feels like summer, and the first porteños leave for the coast after Christmas. Rain falls on about eight days, as storms.
The Immaculate Conception on 8 December is a holiday and the traditional day to decorate. The Colón closes its season mid-December. The shopping streets of Florida and the Alto Palermo mall are busiest in the final week. Daylight lasts until after eight. For high summer and the emptier city, see January.
09Compare
Buenos Aires month by month
| Month | High | Low | Rain days | Sun h | Crowds | Verdict |
|---|---|---|---|---|---|---|
| January | 30 °C | 21 °C | 10 | – | moderate | Excellent |
| February | 29 °C | 21 °C | 10 | – | moderate | Excellent |
| March | 26 °C | 19 °C | 9 | – | busy | Good |
| April | 23 °C | 16 °C | 10 | – | busy | Good |
| May | 19 °C | 12 °C | 8 | – | moderate | Excellent |
| June | 16 °C | 9 °C | 6 | – | quiet | Good |
| July | 15 °C | 8 °C | 8 | – | moderate | Good |
| August | 17 °C | 10 °C | 8 | – | quiet | Excellent |
| September | 19 °C | 12 °C | 8 | – | moderate | Excellent |
| October | 22 °C | 14 °C | 10 | – | busy | Good |
| November | 26 °C | 17 °C | 9 | – | busy | Excellent |
| December | 28 °C | 19 °C | 9 | – | busy | Good |
Not sure about December? See the best time to visit Buenos Aires.
10Elsewhere
December in nearby cities
| City | High | Rain days |
|---|---|---|
| Rio de Janeiro in December | 30 °C | – |
| Cancún in December | 28 °C | – |
| Miami in December | 26 °C | 6 |
| Orlando in December | 23 °C | 2 |
| New York City in December | 8 °C | 10 |
| Toronto in December | 3 °C | 10 |
11FAQ
Buenos Aires in December: your questions
Is December a good time to visit Buenos Aires?
December is a good month to visit Buenos Aires. Daytime highs average 28 °C (83 °F), rain falls on about 9 days, and hotel arrivals run above the yearly average, so the main sights are busy.
What is the weather like in Buenos Aires in December?
Expect warm days around 28 °C (83 °F) and nights near 19 °C (67 °F). One December in ten brings afternoons above 33 °C, and one in ten stays below 24 °C.
Does it rain a lot in Buenos Aires in December?
December brings about 136 mm (5.4 in) of rain over roughly 9 days, which is showery by Buenos Aires standards. On any given day the chance of at least 1 mm of rain is 30 percent.
What should I wear in Buenos Aires in December?
Pack light, breathable clothing, sun hat and sunscreen, refillable water bottle.
Is Buenos Aires crowded in December?
The main sights are busy in December. Main drivers: Polo Open finals; Christmas and New Year; summer heat begins.
What time does it get dark in Buenos Aires in December?
Around the middle of December the sun sets at about 20:02 and rises at 05:34, giving 14.5 hours of daylight.