Official temperature observations from Environment Canada and Toronto Pearson International Airport recorded a daily maximum of 24°C on September 17, 2026, aligning precisely with the market-implied outcome. This result reflected typical late-summer conditions under a northwesterly flow, with partly cloudy skies, a modest chance of showers, and afternoon readings peaking near the seasonal average high of 21.7°C. Model consensus ahead of the date supported this range, and post-event verification left negligible room for revision. Only an anomalous station discrepancy or unreported measurement adjustment could realistically alter resolution, though historical data show such shifts are rare for this location.