Recent European model consensus, including ECMWF and GFS runs, points to a ridge of high pressure building over northern Italy by September 19, promoting clear to partly cloudy skies and light easterly winds that limit nocturnal radiative cooling. This setup supports a daily minimum near 16–17°C for Milan, consistent with late-summer climatology where overnight lows typically range 14–18°C. Trader balance between the 11°C-or-below and 21°C-or-higher brackets at 50% implied probability each reflects lingering uncertainty in exact boundary-layer mixing and dew-point depression under the evolving anticyclone, with finer-grained outcomes clustered around 15–18°C capturing the narrow forecast envelope. Updated model guidance ahead of the date remains the key near-term catalyst.