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Argentina’s Spring Begins Sept. 22 at 15:19 HOA, Buenos Aires Lines Up Weekend Events

Forecasts point to Sunday morning rain with strong southwesterly winds, risking schedule tweaks.

Overview

  • The Servicio de Hidrografía Naval and the Observatorio Astronómico de Córdoba set the equinox for Monday, September 22, 2025, at about 15:19–15:20 in Argentina’s official time (18:19–18:20 UTC).
  • Despite the equinox falling on the 22nd, Argentina’s cultural observance of spring remains concentrated on Sunday, September 21, tied to Día de la Primavera and Día del Estudiante.
  • Buenos Aires scheduled a free Nathy Peluso show at the Planetario on Saturday, September 20, from 14:00 to 21:00, with organizers stating it will move to the next day if it rains.
  • The city’s calendar includes the Maratón Internacional de Buenos Aires on Sunday with a 7:00 start at Av. Figueroa Alcorta and Av. Dorrego, plus an Expo Running at Parque Sarmiento.
  • The National Weather Service forecasts isolated rain on Sunday morning in the capital, a mostly cloudy afternoon, temperatures near 14–18°C, and southerly to southwesterly winds of 42–50 km/h.