What December feels like in Buenos Aires
In Buenos Aires, December brings early summer (Buenos Aires is in the southern hemisphere, so the seasons run opposite to Europe and North America). Warm daytime weather invites long lunches outside and evening strolls. Once the sun goes down the air changes: nights stay warm. Some humidity hangs in the air, noticeable when the sun is strong.
Rain in Buenos Aires in December
Expect a mix of dry and wet days, with rain about one day in 4. When rain comes it is heavy, about 9.6 mm (0.4 in) per wet day, often in short, strong bursts. The yearly figure is similar, around 11.5 mm per wet day.
Daylight and sunshine in December
In mid-December, sunrise is at about 5:35 am and sunset at about 8:02 pm (local time) — 14 h 27 min of daylight. The days are stretching out — 33 min more daylight than mid-November. Measured sunshine covers about 87% of the daylight — skies are mostly clear.
How December compares to the rest of the year
In Buenos Aires's temperature order, December sits as the 3rd warmest month. Afternoons run 2.8°C (5°F) warmer than in November, with 14 mm less rain. The warm-up continues into January. January averages a high of 28.3°C (82.9°F).
Who December suits
- Sightseeing: a good fit — daytime temperatures are fine for walking around.
- Parks & outdoor: less ideal — afternoons are too warm to linger outside.
- Beach: less ideal — too many rainy days.
Tips for visiting Buenos Aires in December
Versatile Layers
Days are noticeably warmer than nights — layers you can add or remove.
Rain Protection
Keep a small umbrella in your bag and wear shoes that cope with puddles.
Sunglasses
Bright days make sunglasses worth packing.
Quick questions
How warm is Buenos Aires in December?
It feels warm: typical highs are 27.2°C (81°F), with lows near 19.2°C (66.6°F).
Does it rain a lot in Buenos Aires in December?
Yes, fairly — rain falls about one day in 4 and totals about 77 mm, so an umbrella is worth carrying.
What should I wear in Buenos Aires in December?
Pack versatile layers, rain protection and sunglasses. Evenings feel similar to the day, so the same clothes work from morning to night.
Is December or January better for visiting Buenos Aires?
December scores better on our climate ranking (#10 of 12 vs #11), rated Good against Good. January is warmer.