Official forecasts from Environment Canada project a sunny high of 21°C in Toronto on September 26 under northeast winds near 20 km/h, aligning with the seasonal average of 19.7°C. Trader consensus heavily favors 23°C as the leading outcome, reflecting ensemble model spreads that allow for modest daytime warming under mostly clear skies and low precipitation chances. Recent model runs show minor upward revisions in some guidance, while official outlooks remain anchored near 21–22°C. Resolution hinges on the day's peak observation at Pearson Airport or equivalent stations, with low odds on extremes underscoring limited forecast uncertainty this close to the event.