Toronto actually has a higher average temp. than chicago (for example) nd being a big city, with lots of concrete, trust me we do manage to bake to a toasty brown in.... but its the humidity that is a killer as usual. :) (and me with a leather jacket while riding... even during the hottest days I prefer intact skin to being cool)
Ah well, with a good set of green lights ahead of me and a 50kph breeze cooling me off while riding downtown... I do alright :)
Jamie