**Market-implied odds reflect strong trader consensus that Toronto’s official high on October 4 will reach exactly 22°C.** Recent Environment Canada and numerical weather prediction runs support this outcome, with afternoon temperatures climbing under mostly cloudy skies, light southwesterly winds, and a brief chance of showers that did not suppress the peak. Observed readings near 20°C by early evening align with model guidance projecting a daytime maximum in the low-22°C range, consistent with seasonal norms for early October. The 100% probability on 22°C indicates minimal expected variance in the final station measurement. Only an unusually sharp late-day cooling or station-specific microclimate effect would realistically shift the recorded high outside this narrow band.