Official temperature observations from Environment Canada stations in Toronto on September 23, 2026, recorded a daily maximum of 18°C under sunny skies with easterly winds gusting to 45 km/h. This outcome aligned with model consensus from the prior 48 hours, which showed stable high-pressure ridging suppressing cloud cover and limiting daytime heating near seasonal norms of 20°C. The market-implied odds reflect verified surface data rather than forecasts, with the 100% consensus on 18°C driven by the absence of any station reporting higher values. Cooler anomalies in the preceding week, including overnight lows near 7–9°C, further constrained diurnal temperature ranges. Subsequent data releases from the National Climate Data and Information Archive will finalize resolution criteria.