Traders overwhelmingly back 13°C (99.6% implied probability) as Toronto's highest temperature on March 16, driven by converging forecasts from Environment and Climate Change Canada and global models like ECMWF and GFS, which project daytime highs peaking precisely at 13°C amid partly cloudy skies and light southerly winds. Ensemble predictions show tight clustering around 12-14°C, with low wind shear and stable upper-air patterns minimizing deviations typical in mid-March's variable synoptic conditions. Historical data reinforces reliability, as short-range (24-48 hour) temperature forecasts for Toronto achieve 90%+ accuracy within 2°C. Challenges could arise from an unforeseen warm front or nocturnal inversion breakdown pushing 14°C+, but current geopotential height analyses indicate scant risk.