Forecast models from the European Centre for Medium-Range Weather Forecasts and national Italian services show Milan under a stable high-pressure ridge with southerly flow, favoring peak temperatures near 31–33 °C on August 17. Ensemble spreads produce closely matched market-implied odds because small differences in boundary-layer mixing, cloud cover, and urban heat-island intensity can shift the daily maximum by 1–2 °C. Recent model runs have held this narrow range steady, with limited synoptic change expected before the event. Traders therefore assign the highest probabilities to the central bins while discounting tails, reflecting both the tight forecast consensus and the inherent uncertainty in resolving exact maximum values from available guidance.