Recent forecast guidance from Environment Canada and major models shows Toronto under partly sunny conditions with a daytime high likely peaking near 26–27 °C, reflecting typical mid-August climatology of 24–26 °C. Light winds, modest humidity, and limited afternoon cloud cover or isolated showers are the key variables that will determine whether the official maximum edges into the upper or lower half of that narrow range. With probabilities tightly clustered between 25 °C and 28 °C, traders are pricing in the remaining uncertainty from model spread on boundary-layer mixing and any late-day convective development that could shave a degree or two off the peak reading.