As a Canadian, 50 is kill me right now cause fuck that, 40 would be constant cold showers to stay cool, 30 is uncomfortable and needs occasional cold showers, 20 is perfect summer weather, 10 is perfect spring weather and 0 is a nice winter day.
Can’t stand the heat, I’ll take -30C over +30C any day. Can always put on more layers if you’re cold, there’s only so much you can take off when you’re hot though.