Environment Canada’s official forecast for Toronto on August 11, 2026, calls for sunny skies becoming a mix of sun and cloud, with a daytime high of 28°C and humidex values reaching 33 under strong solar heating and light northwest winds. This aligns with the market’s leading outcome at 28°C (50.5% implied probability), as ensemble guidance clusters tightly around 27–29°C. Mid-August climatology for the region typically sees highs of 24–26°C, but the current pattern—sunny conditions across the Aug 10–16 window—has lifted expectations modestly above seasonal norms. Minor model spread stems from variables like exact cloud timing or localized moisture, which could limit the peak to 27°C or briefly allow 29°C, explaining the secondary probabilities on those outcomes. No major revisions have emerged from recent model runs, keeping trader consensus anchored to the official guidance ahead of resolution at Pearson Airport.