Official forecasts from Environment Canada and supporting numerical weather prediction models indicate a high near 21°C for Toronto on September 14 under sunny skies and northwesterly flow, following a cold frontal passage that has introduced drier, cooler air masses. This setup favors afternoon maxima clustering around 19–21°C, consistent with historical late-summer climatology and the absence of strong southerly advection or cloud cover that could alter radiative heating. Trader consensus, reflected in the 48.5% implied probability for 20°C, incorporates minor model spread on peak timing and boundary-layer mixing, with lower odds on 22°C or above underscoring limited warming potential before resolution. Updated guidance and observational data from the National Weather Service and Canadian meteorological agencies will refine these probabilities ahead of market close.