Environment Canada’s official forecast for Toronto on August 13 calls for a mix of sun and cloud with a 40% chance of showers and a daytime high of 26°C, reflecting modest surface heating under variable cloud cover and limited moisture. Ensemble models and nearby stations show a narrow range around this value, with afternoon temperatures most likely peaking between 26–28°C depending on the timing and extent of any convective activity or breaks in cloud. The closely matched market-implied probabilities for 27°C and 28°C capture this uncertainty in diurnal maximum, as even modest differences in insolation or shower timing can shift the observed high by 1–2°C. Historical August climatology places typical highs near 24–25°C, so current guidance indicates slightly above-average warmth that remains sensitive to short-term model updates before the day concludes.