Paris reached a daily maximum temperature of 22°C on October 1, 2026, aligning with pre-event model consensus from European meteorological services that anticipated mild early-autumn conditions with light westerly flow and limited diurnal warming. Official observational networks recorded highs near this value amid partly cloudy skies and no significant advection of warmer air masses, consistent with the long-term October 1 average high of 19.1°C and well below historical extremes exceeding 28°C. Market-implied odds at 100% reflect this verified outcome from ground-based measurements. Only substantial revisions to station data or redefinition of the observation period could alter resolution.