Current forecasts from Environment Canada and GFS models show Toronto clearing under high pressure on October 3 with light northeast winds, promoting strong overnight radiative cooling after daytime highs near 16–18°C. This setup typically produces lows of 5–10°C, near the historical average of 10.3°C, though slight shifts in wind direction or residual moisture could alter boundary-layer mixing and minimum readings. The near-even market split between 3°C-or-below and 13°C-or-higher outcomes reflects genuine uncertainty in short-range model guidance and potential for modest cold-air advection versus warmer return flow. Traders are watching the next 48-hour model runs for confirmation of clear, calm conditions that favor the lower end of the range.