Recent official forecasts from Environment Canada and global models indicate a high-pressure system with northwesterly flow and clear skies over Toronto, supporting radiative cooling and overnight lows near 5–10°C on October 5. Model consensus places the daily minimum around or slightly below the 1991–2020 climatological average of 9.9°C, though spread in GFS and other runs creates uncertainty between sub-5°C scenarios and milder outcomes near 10–12°C. Strong winds of 15–18 mph may limit extreme cooling, while the absence of precipitation or cloud cover favors lower readings. Upcoming model updates and any revisions to the steering pattern will likely drive the tight market-implied probabilities between the leading low-temperature outcomes.