Recent forecasts from meteorological models point to a maximum temperature near 16–17°C in Buenos Aires on May 18, aligning with the market’s leading outcomes. Autumn cooling in the Southern Hemisphere has lowered typical highs from early-May peaks near 19°C toward seasonal averages of 16–18°C, with current guidance showing stable high pressure and light winds limiting afternoon warming. Ensemble runs indicate low chances of significant cold advection or cloud cover that would suppress readings below 15°C, while the absence of strong northerly flow reduces the likelihood of exceeding 18°C. Traders are therefore weighting the narrow 15–17°C band most heavily, consistent with historical May variability and the latest short-range model consensus ahead of tomorrow’s official observations.