Buenos Aires Weather in December
December in Buenos Aires typically sees daytime highs of 29°C (84°F) and nighttime lows of 17°C (63°F). Rainfall is also possible this month, so it's worth packing an umbrella.
Rainfall in Buenos Aires in December
Rain is expected on roughly 8 days, totalling around 88 mm (3.5 in) for the month. Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.
Temperature in Buenos Aires in December
December is a perfect month in Buenos Aires, with 29°C (84°F) during the day and 17°C (63°F) at night. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. At 17°C (63°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.
Sunshine in Buenos Aires in December
The city usually sees around 273 hours of sunlight, indicating many sunny days — a great month for sightseeing.
Wind Speed in Buenos Aires in December
Wind speeds average 3 m/s (6 knots) during December. At this speed, light breezes keep leaves and small twigs in gentle motion while the wind also provides natural cooling. Since this is an average, some days are more tranquil while others have more persistent light winds that are more noticeable.
Average water temperature in December
The water temperature is 19°C (66°F). It's not warm, but most people find it perfectly fine for a swim once they're in.If you're a fan of comfortable temperatures and drier conditions, December is a great time to visit.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Argentina, check out our Buenos Aires's climate page.
Buenos Aires Temperature in December
Min Temperature
17°C (63°F)
Max Temperature
29°C (84°F)
Water Temperature
19°C (66°F)
Chance of Rain
27%
Precipitation
88 mm (3.5 in)
Rainy days
8 days
Humidity
63%
Windspeed
3 m/s (6 knots)
Sunshine
273 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Buenos Aires typically rise from around 27°C (81°F) at the start of December to approximately 30°C (86°F) by the end. Nights are pleasant, with lows typically ranging from 14°C (57°F) to 19°C (66°F).
Average temperatures in December
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in December
Historical weather for Buenos Aires in December
Browse day-by-day weather records for Buenos Aires spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Buenos Aires historical weather extremes in December
Based on 49 years of weather observations (1976-2025), these are the most extreme conditions recorded in Buenos Aires.
- The hottest December day on record in Buenos Aires reached 40°C (104°F) (December 31, 2025).
- The coldest December day was on December 2, 2001, with a maximum of 16°C (61°F).
- Buenos Aires registered its coldest December night on December 6, 1999, with temperatures dropping to 5°C (41°F).
Best Places in Argentina in December
Find out more about the weather in Argentina and which places have the best travel conditions in this month. See all of Argentina in December →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Buenos Aires in December
Warm but pleasant conditions in Buenos Aires in December. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Expect heavy rainfall, so bring good rain protection and waterproof bags. With water temperatures around 19°C (66°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Buenos Aires in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Argentina, check out our Buenos Aires's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Buenos Aires climate overview or explore weather in Argentina.
