Recent official forecasts from Environment Canada and supporting models indicate a cool, mostly clear high-pressure system over Toronto on October 6, with daytime highs centered in the 15–17°C range amid northwest winds and minimal cloud cover. This setup follows a frontal passage on October 4–5 that advected cooler air, aligning with climatological norms where the long-term average high sits near 17°C. Model consensus currently favors afternoon peaks around 16°C, driving the market’s heaviest weighting on that outcome while leaving modest room for minor forecast revisions from updated runs or local variations. Traders are pricing in the typical uncertainty range of numerical weather prediction for a two-day horizon.