Weather forecast for General San Martín, Buenos Aires: Tuesday, July 21, 2026

General San Martín, Buenos Aires, will experience a cool Tuesday, July 21, 2026, with temperatures ranging from a low of 10°C to a high of 13°C. The National Meteorological Service (SMN) forecasts light winds from the southeast at approximately 17 km/h throughout the day, with humidity remaining high, around 94% in the morning and slightly decreasing later.

No precipitation is expected in the early morning, mid-morning, afternoon, or evening. The SMN, Argentina's official meteorological agency, is responsible for collecting, analyzing, and disseminating weather information. It operates through a network of stations, satellite imagery, and numerical prediction models to forecast weather and issue early warnings.

The article also provides context on meteorological alerts, defining them as the "possible occurrence of a meteorological threat" issued to aid decision-making. These alerts can be for rain, storms, extreme temperatures, or unusual phenomena. The SMN uses different alert levels: yellow for possible damage and temporary disruption, orange for dangerous phenomena posing risks to society and the environment, and red for exceptional phenomena with potential to cause emergencies or disasters.