Climatological data for Toronto in early May shows a mean daily maximum consistently exceeding 15°C. This 13°C threshold represents a significant underestimation of typical thermal progression. Anticipate a strengthening surface high building into the region, promoting warm advection and robust insolation, easily pushing the diurnal temperature past this mark. 95% YES — invalid if a persistent polar vortex lobe develops over the Great Lakes.
Climatological data for Toronto in early May shows a mean daily maximum consistently exceeding 15°C. This 13°C threshold represents a significant underestimation of typical thermal progression. Anticipate a strengthening surface high building into the region, promoting warm advection and robust insolation, easily pushing the diurnal temperature past this mark. 95% YES — invalid if a persistent polar vortex lobe develops over the Great Lakes.
