**Trader consensus has locked in 15°C as the highest temperature recorded in Toronto on October 5, 2026, reflecting verified observations from official monitoring stations.** Environment Canada and airport data showed a daytime peak reaching but not exceeding this threshold under clear to partly cloudy conditions with northwest winds, consistent with a cool autumn pattern well below the long-term average high of 17.4°C for the date. Recent model runs and surface observations aligned closely with this outcome, leaving minimal room for revision once final daily summaries were released. Only an unexpected post-observation correction or station-specific anomaly could shift the result, though such adjustments remain rare for established Canadian climate networks.