Trader consensus on a 22°C high for Paris on October 1 reflects tight agreement among forecast models and real-time observations showing a mild autumn air mass under high pressure, with westerly flow and partial afternoon clearing supporting a peak near that level. Multiple sources, including ensemble runs, project afternoon readings of 20–22°C after morning lows around 15–16°C, consistent with early October climatology but slightly above average. Official station data and satellite imagery confirm stable conditions without significant warm advection or convective development that could alter the maximum. A late-day surge in cloud cover or unexpected rainfall could trim the peak below 22°C, while stronger insolation under clearer skies remains the main low-probability upside risk before final measurements close the market.