Argentina in December: where is it warmest?
In December, Rosario is the warmest place with 29 °C by day, Ushuaia the coolest with 11 °C. 9 of 10 destinations have good holiday weather.
All destinations in December, warmest first
Long-term averages for the month: daytime high, sea, sunshine and rainy days.
| Place | Score | Air | Sea | Sun | Rain days |
|---|---|---|---|---|---|
| Rosario | 78 | 29° | – | 9 h | 8 |
| Córdoba, Argentina | 71 | 29° | – | 8 h | 10 |
| Mendoza | 69 | 28° | – | 11 h | 8 |
| Buenos Aires | 91 | 27° | 24° | 9 h | 8 |
| La Plata | 91 | 26° | – | 10 h | 8 |
| Villa General Belgrano | 66 | 26° | – | 8 h | 15 |
| Mar del Plata | 80 | 24° | 18° | 6 h | 8 |
| Bariloche | 95 | 18° | – | 11 h | 5 |
| El Calafate | 61 | 13° | – | 9 h | 11 |
| Ushuaia | 7 | 11° | 8° | 5 h | 24 |
Argentina in December: quick answers
Argentina in December: where is it warmest?
The warmest places in December are Rosario (29 °C), Córdoba, Argentina (29 °C) and Mendoza (28 °C).
Argentina in December: where is the sea warmest?
The sea is warmest at Buenos Aires (24 °C), Mar del Plata (18 °C) and Ushuaia (8 °C).
Argentina in December: where is the weather best?
The best holiday weather in December – warm, sunny and dry – is in Bariloche, Buenos Aires and La Plata.
Argentina month by month
Argentina: weather & best time to visit
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences