Buenos Aires weather in December
December is one of the best months to visit Buenos Aires: highs of 23°C (73°F) and about 115 mm (4.5 in) of rain on average. Nights average 15°C (58°F) and cloud cover 46% (NASA POWER, 2001–2025 averages). It is the 4th wettest month of the year and the 3rd warmest. Compared with November, it is warmer and about as wet; January brings highs of 24°C (76°F) and 125 mm (4.9 in) of rain.
Figures are long-term averages for Mar del Plata, the largest city in Buenos Aires. See below for other places.
Is December a good time to visit Buenos Aires?
best month Weather score 72/100.
Yes. December is one of the best months for weather in Buenos Aires.
Does it rain a lot in Buenos Aires in December?
Some rain is normal: about 115 mm (4.5 in) falls in an average December. It is the 4th wettest month of the year.
How warm is Buenos Aires in December?
Days average 23°C (73°F) and nights 15°C (58°F).
Buenos Aires weather by month
| Month | High | Low | Rain | Cloud | Weather |
|---|---|---|---|---|---|
| January | 24°C (76°F) | 17°C (62°F) | 125 mm | 45% | best |
| February | 24°C (75°F) | 17°C (62°F) | 125 mm | 47% | best |
| March | 22°C (71°F) | 16°C (60°F) | 118 mm | 48% | best |
| April | 19°C (65°F) | 13°C (55°F) | 105 mm | 54% | best |
| May | 15°C (59°F) | 10°C (50°F) | 75 mm | 64% | fair |
| June | 12°C (54°F) | 7°C (45°F) | 62 mm | 64% | least pleasant |
| July | 11°C (51°F) | 6°C (42°F) | 70 mm | 67% | least pleasant |
| August | 12°C (53°F) | 6°C (43°F) | 78 mm | 62% | least pleasant |
| September | 13°C (56°F) | 7°C (45°F) | 77 mm | 59% | fair |
| October | 16°C (61°F) | 9°C (49°F) | 101 mm | 58% | fair |
| November | 19°C (67°F) | 12°C (53°F) | 106 mm | 49% | best |
| December | 23°C (73°F) | 15°C (58°F) | 115 mm | 46% | best |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis). Page updated . How we rate months
Weather across Buenos Aires in December
Weather can differ a lot within Buenos Aires: coasts, hills and mountains each have their own climate.
| Place | High | Low | Rain | Weather |
|---|---|---|---|---|
| Mar del Plata | 23°C (73°F) | 15°C (58°F) | 115 mm | best |
| Avellaneda | 26°C (79°F) | 20°C (68°F) | 94 mm | best |
| Bahía Blanca | 31°C (87°F) | 14°C (58°F) | 56 mm | best |
| Merlo | 30°C (86°F) | 16°C (61°F) | 97 mm | best |
| Quilmes | 26°C (79°F) | 20°C (68°F) | 94 mm | best |
| Laferrere | 30°C (86°F) | 15°C (60°F) | 90 mm | best |
| José C. Paz | 30°C (86°F) | 16°C (61°F) | 97 mm | best |
| Lanús | 26°C (79°F) | 20°C (68°F) | 94 mm | best |
| La Plata | 29°C (84°F) | 16°C (62°F) | 91 mm | best |
| Berazategui | 29°C (84°F) | 16°C (62°F) | 91 mm | best |
| San Miguel | 30°C (86°F) | 16°C (61°F) | 97 mm | best |
| Moreno | 30°C (86°F) | 16°C (61°F) | 97 mm | best |