Recent Environment Canada and ensemble model guidance point to a Toronto Pearson maximum near 27–28 °C on August 14 under mostly sunny skies and light northerly flow, explaining the tight 40.5 % / 32.5 % split between those bins. Small differences in afternoon cloud timing, boundary-layer mixing, or localized urban heat retention can shift the peak by 1 °C, keeping 26 °C and 29 °C outcomes viable at lower probabilities. August climatology centers on 25–26 °C highs, so the current setup reflects modestly above-average ridging without strong advection. The official 24-hour maximum reported by the station will resolve the market; any late-day shower or measurement adjustment remains the chief source of residual uncertainty ahead of tomorrow’s final reading.