January weather forecast
Argentina

January in Argentina is the peak of summer, with temperatures varying significantly across the vast geographical expanse of the country. In the northern regions, which include notable cities such as Salta and Tucuman, the climate is generally hot and humid, with temperatures typically ranging from 20°C (68°F) to 35°C (95°F). This region often experiences the highest temperatures of the year in January, occasionally even surpassing 40°C (104°F). The heat is usually accompanied by high levels of precipitation due to the monsoon-influenced subtropical climate.

In contrast, the central regions, including Buenos Aires, Cordoba, and Rosario, experience slightly milder conditions. Temperatures in Buenos Aires in January average between 20°C (68°F) and 30°C (86°F), making it one of the warmest months of the year in the city. It is also a relatively rainy month with an average rainfall of 100mm (3.94").

The weather in January presents a stark contrast when moving further south towards Patagonia and Tierra del Fuego. Here, the temperatures remain considerably cooler, ranging from 5°C (41°F) to 15°C (59°F). Ushuaia, the southernmost city in the world, experiences temperatures from 5°C (41°F) to 14°C (57.2°F) in January, which is actually its warmest month.

The western parts of Argentina, defined by the Andes Mountains, have their own unique climatic conditions. In places such as Mendoza and San Juan, the summer weather can be quite dry due to their semi-arid climates. Temperatures in these regions in January generally range from 15°C (59°F) to 35°C (95°F).

When compared to December, the weather in January is generally hotter across the country, especially in the northern and central regions. However, temperatures start to decrease towards the end of the month as the country gradually transitions towards autumn.

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• Buenos Aires - January »
  The month with the warmest seawater in Buenos Aires is January, with an average sea temperature of 25°C (77°F). January is the month with the warmest seawater in Buenos Aires, with an average sea temperature of 25°C (77°F).
• Cordoba - January »
  The months with the highest UV index in Cordoba are January, February, November and December, with an average maximum UV index of 6. January, with average temperatures reaching a high of 30.5°C (86.9°F) and a low of 17.8°C (64°F), is the warmest month in Cordoba, Argentina.
• Rosario - January »
  January, recognised by an average high temperature of 33.4°C (92.1°F) and a low of 18.8°C (65.8°F), is Rosario's warmest month. In Rosario, the month of January is known for its highest average temperatures, reaching a high of 33.4°C (92.1°F) and a low of 18.8°C (65.8°F).
• Mendoza - January »
  In Mendoza, January is the month with the highest recorded average temperatures, measuring a high of 28.3°C (82.9°F) and a low of 18.5°C (65.3°F). January, February and December, with an average maximum UV index of 6, are months with the highest UV index in Mendoza.
• San Miguel de Tucumán - January »
  On the first day of January in San Miguel de Tucumán sunrise is at 06:30 and sunset at 20:18. In San Miguel de Tucumán snow does not fall in January through June, August through December.
• La Plata - January »
  In January, the average heat index, which factors the actual air temperature with the relative humidity, is estimated at 32°C (89.6°F). On the last day of January, in La Plata, sunrise is at 06:10 and sunset at 20:00 -03.
• Mar del Plata - January »
  January, having an average high-temperature of 25.2°C (77.4°F) and an average low-temperature of 16.9°C (62.4°F), is the warmest month in Mar del Plata, Argentina. January is the month with the warmest seawater in Mar del Plata, with an average sea temperature of 20.7°C (69.3°F).
• Santa Fe - January »
  The least humid month in Santa Fe is January, with an average relative humidity of 51%. Temperature readings in Santa Fe reach their annual highs in January, averaging 33.5°C (92.3°F) and a minimum average of 20.5°C (68.9°F).
• Salta - January »
  The month with the most rainfall in Salta is January, when the rain falls for 21.1 days and typically aggregates up to 105mm (4.13") of precipitation. In Salta weather conditions in January primarily present high humidity levels, fluctuating between frequent rainy days and enviable sunny days.
• San Juan - January »
  The month with the most rainfall in San Juan is January, when the rain falls for 9.2 days and typically aggregates up to 29mm (1.14") of precipitation. January is the month when San Juan sees the average highest temperatures, with a high of 30.6°C (87.1°F) and a low of 19.4°C (66.9°F).
• Resistencia - January »
  January holds the monopoly of the warmest period in Resistencia, Argentina with the highest average temperature positioned at 33.8°C (92.8°F). Temperature readings in Resistencia reach their annual highs in January, averaging 33.8°C (92.8°F) and a minimum average of 22.1°C (71.8°F).
• Neuquen - January »
  On the first day of January in Neuquen sunrise is at 06:10 and sunset at 21:01. In Neuquen, during January, the rain falls for 3 days and regularly aggregates up to 16mm (0.63") of precipitation.