Latest ensemble forecasts from the European Centre for Medium-Range Weather Forecasts and Global Forecast System show Milan under stable anticyclonic conditions on May 19, with daytime highs most likely peaking at 22–23°C due to clear skies and light southerly flow. This setup favors strong daytime radiative heating over the Po Valley while limiting cloud formation and convective cooling, aligning with mid-May climatology where average maxima range 21–23°C. Minor model differences in boundary-layer moisture or timing of any weak frontal passage create the narrow spread between the 23°C and 22°C outcomes, each carrying roughly equal trader weight. Updated runs from the Italian Meteorological Service and ARPA Lombardia over the next 24–48 hours will clarify whether slight warming pushes the maximum into the upper bracket.