Official meteorological observations for Toronto on September 16 confirm a daily low of 17°C, driving the market-implied odds overwhelmingly toward that outcome. Environment and Climate Change Canada stations recorded this minimum under stable high-pressure conditions with light winds and clear skies that prevented further nocturnal cooling below seasonal norms. Historical September climatology for the region shows average lows near 12–14°C, making the observed value consistent with recent above-average warmth but firmly above lower thresholds. Minor model revisions or station data adjustments remain possible before final certification, yet such changes rarely exceed 1°C and would need to shift the reading substantially to alter resolution.