Tight clustering of probabilities around 17-19°C for Milan's March 24 high temperature stems from ensemble forecast spreads in ECMWF and GFS models, with median projections near 18°C amid a developing high-pressure ridge over northern Italy. Recent model runs show southerly airflow potentially pushing maxima to 19°C under clearer skies and stronger insolation, differentiating it from cooler 17°C scenarios tied to lingering stratiform clouds and weaker boundary-layer mixing. Historical late-March highs average 14-15°C, but this year's positive anomalies from Atlantic warmth favor mild outcomes; traders await hourly updates from ARPA Lombardia for resolution on peak afternoon heating.