December weather forecast
Argentina

December marks the onset of summer in Argentina, bringing warmer temperatures throughout the country and diverse precipitation patterns across the different regions.

In the northern regions, such as Salta and Tucuman, the climate becomes notably warmer with temperatures typically ranging from 21°C (69.8°F) to 31°C (87.8°F). December is also a relatively wet month in these areas, continuing the rainy season trend that begins in November.

The central regions of Argentina, including Buenos Aires, Cordoba, and Rosario, also experience increased temperatures. Buenos Aires, for instance, sees temperatures ranging from 18°C (64.4°F) to 30°C (86°F). The average rainfall in Buenos Aires during December decreases to about 90mm (3.54"), marking a reduction in the intense spring rains.

The southernmost regions of Argentina, including Patagonia and Tierra del Fuego, experience temperatures ranging from 10°C (50°F) to 18°C (64.4°F). December, being part of the warmer months in these regions, presents a window for travellers to explore the scenic beauty of the area, as snowfall becomes rare, and the weather is relatively milder.

The Andean region, including cities such as Mendoza and San Juan, witness a rise in temperatures, typically falling between 17°C (62.6°F) and 33°C (91.4°F). Despite the increased warmth, these areas maintain a dry climate due to the region's semi-arid nature.

Compared to November, the weather in Argentina in December is generally warmer across all regions, signifying the onset of the summer season. As Argentina moves from December into January, the temperatures are expected to continue increasing, while rainfall will vary depending on the region.

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• Buenos Aires - December »
  In Buenos Aires, Argentina, in December, during 9.5 rainfall days, 69mm (2.72") of precipitation is typically accumulated. In Buenos Aires during December, the rain falls for 9.5 days and regularly aggregates up to 69mm (2.72") of precipitation.
• Cordoba - December »
  The month with the longest days in Cordoba is December, with an average of 14h and 12min of daylight. In Cordoba snow does not fall in January through June, August through December.
• Rosario - December »
  The month with the most rainfall in Rosario is December, when the rain falls for 9.1 days and typically aggregates up to 72mm (2.83") of precipitation. In Rosario during December, the rain falls for 9.1 days and regularly aggregates up to 72mm (2.83") of precipitation.
• Mendoza - December »
  January, September and December, with an average of 9.7h of sunshine, are months with the most sunshine in Mendoza. In Mendoza, Argentina, during December, the rain falls for 13.2 days and regularly aggregates up to 54mm (2.13") of precipitation.
• San Miguel de Tucumán - December »
  The month with the longest days in San Miguel de Tucumán, Argentina, is December, with an average of 13h and 48min of daylight. In San Miguel de Tucumán, in December, during 19.4 rainfall days, 133mm (5.24") of precipitation is typically accumulated.
• La Plata - December »
  The least humid month in La Plata is December, with an average relative humidity of 70%. With an average of 14h and 30min of daylight, December has the longest days of the year in La Plata, Argentina.
• Mar del Plata - December »
  In Mar del Plata in December, during 10.2 rainfall days, 35mm (1.38") of precipitation is typically accumulated. On the last day of December, in Mar del Plata sunrise is at 05:30 and sunset at 20:16 -03.
• Santa Fe - December »
  In Santa Fe during December, the rain falls for 9.6 days and regularly aggregates up to 69mm (2.72") of precipitation. With an average of 14h and 12min of daylight, December has the longest days of the year in Santa Fe, Argentina.
• Salta - December »
  In Salta, Argentina, during December, the rain falls for 21 days and regularly aggregates up to 89mm (3.5") of precipitation. December, with an average high of 24.3°C (75.7°F) and a low of 14.8°C (58.6°F), signifies the warmest month of the year in Salta, Argentina.
• San Juan - December »
  In San Juan in December, during 8.1 rainfall days, 16mm (0.63") of precipitation is typically accumulated. In San Juan during December, the rain falls for 8.1 days and regularly aggregates up to 16mm (0.63") of precipitation.
• Resistencia - December »
  In Resistencia in December, it is raining for 12.2 days, with typically 78mm (3.07") of accumulated precipitation. In Resistencia, in December, it is raining for 12.2 days, with typically 78mm (3.07") of accumulated precipitation.
• Neuquen - December »
  The least humid month in Neuquen is December, with an average relative humidity of 36.7%. The least humid month in Neuquen is December, with an average relative humidity of 36.7%.