Latest model consensus from Environment Canada and global ensembles points to an overnight low in Toronto near 17–18°C on August 22, with the tight clustering of market odds around 17–19°C reflecting modest differences in simulated cloud cover and boundary-layer mixing. Clearer skies would enhance radiative cooling toward the lower end of the range, while scattered showers or increased low-level moisture—consistent with the warm, unstable pattern forecast for Aug 22–26—limit that drop and favor readings near 19°C. Wind speeds and dew-point depressions remain the key differentiating variables across runs, as even small changes in these alter minimum temperature by 1–2°C. With resolution occurring within hours, the next model update cycle will likely sharpen trader positioning.