**Trader consensus on a 22°C high for Paris on October 1 rests on tight agreement across numerical weather models and real-time observations.** Ensemble forecasts from sources such as Météo-France-aligned guidance and global models consistently project a daytime maximum near 22°C under partly cloudy skies, light-to-moderate westerly flow, and surface pressures around 1025–1030 hPa, with afternoon readings reaching but not exceeding this threshold. Historical October baselines for Paris average 18–20°C, making the current mild pattern slightly above normal yet stable. Minor model spread exists around cloud cover and boundary-layer mixing, but late-day clearing and consistent station trends reduce the chance of notable deviation. Only an unanticipated warm advection or measurement revision would realistically alter the outcome before resolution.