Current forecast models from regional meteorological agencies indicate a highest temperature in Buenos Aires on May 19 most likely falling in the 17–19°C range, aligning with the closely matched market probabilities. This reflects typical mid-autumn conditions in the Southern Hemisphere, where weakening solar radiation and southerly flow limit daytime heating, though a transient high-pressure ridge over the South Atlantic may suppress cloud cover and allow modest warming. Official guidance from the Servicio Meteorológico Nacional highlights stable subsidence and light winds that favor afternoon maxima near the seasonal average of 17–18°C, with limited model spread among ensemble runs. New observational data from surface stations and updated numerical forecasts expected within the next 24 hours could narrow the distribution around these central outcomes.