Latest forecasts from regional meteorological models indicate a likely maximum temperature of 18°C in Buenos Aires on May 19, supported by stable high-pressure conditions and typical late-autumn patterns in the Río de la Plata region. Seasonal averages place daily highs near 18–19°C during May, with minor deviations arising from variable Atlantic moisture, light southerly winds, or partial cloud cover that can suppress or enhance daytime warming. Model consensus shows limited spread around these values, reflecting the narrow uncertainty range for a 48-hour outlook, though subtle shifts in frontal timing could nudge the outcome toward 17°C or 19°C. Traders weigh these atmospheric factors against historical variability, where similar dates have occasionally produced brief excursions outside the central range.