Every year at this time, it's the same story. Much of Toronto is in shorts and tee shirts, often complaining about the heat, but in my hood people are still wearing jackets.
Today, for example, I took a bike ride and experienced the dramatic temperature dip at a specific point when riding south down the hill on Colborne Lodge Drive in High Park. North of the line in this map it felt like 23 degrees, south it was closer to 12 degrees. No foolin'.