Polar Wave Brings Unexpected Snow to Buenos Aires Province

Unexpected snowfall covered several towns in the province of Buenos Aires during the night of July 1 and the early morning of July 2, 2026 [1, 2].

This rare meteorological event highlights the volatility of current weather patterns in Argentina, as snow reached regions where such conditions are uncommon. The event disrupted daily routines and drew thousands of residents outdoors to document the landscape.

The snowfall was driven by an extremely cold Antarctic air mass, known as a polar wave, which pushed temperatures below freezing across large portions of the country [3, 4, 5]. While the province of Buenos Aires saw significant accumulation, the weather system extended far beyond the coast. Snow was also reported in the provinces of Córdoba, Tucumán, Mendoza, San Juan, and Catamarca [1, 3, 4, 5].

In Mar del Plata, residents filmed the snow as it blanketed the city, marking an unforgettable moment for the coastal community ^[2]. The intensity of the cold was felt deeply in urban centers. In La Plata, the forecasted minimum temperature reached -3 °C ^[6], which was identified as the coldest day of the year ^[6].

Local residents across the affected areas used social media to share images of "white postcards," depicting streets, and parks covered in a layer of frost and snow ^[5]. The polar wave triggered alerts for extreme cold throughout nearly the entire country, prompting health and safety warnings as temperatures plummeted ^[4].

Meteorologists said that the combination of the Antarctic air mass and specific moisture levels created the ideal conditions for snowfall in these lower-latitude regions [3, 5]. The event remains a significant anomaly for the region's winter season, as these provinces typically experience rain or frost rather than accumulated snow [1, 3].