**Official forecasts position Toronto's August 25 high near the late-August climatological average of 25–26°C, but with notable day-to-day variability from cloud cover and showers that suppress maxima.** Environment Canada currently projects a mix of sun and cloud with a daytime high of 24°C and a 30% chance of showers overnight, aligning closely with recent model runs that show limited warming potential under unsettled conditions. This setup creates tight differentiation between the leading 24°C and 25°C outcomes, as modest shifts in solar radiation or precipitation timing can easily swing the observed maximum by 1–2°C. Historical analogs from similar late-summer patterns indicate that partial cloud decks often cap peaks 1–2°C below clear-sky potential, supporting the market's heavy weighting on these two bins while assigning lower probability to 26°C or higher. Updated guidance ahead of the peak heating period will be the key near-term catalyst for any rebalancing of implied probabilities.