The last time I was in Montreal it was ~ 95 degrees, but I still ended up freezing because: (A) I couldn't figure out the hotel thermostat and (B) my troubles were compounded by a utter failure to translate into Celsius! I'm going to bring a conversion chart next time. The previous time, I was in Montreal it was 98 degrees. Maybe, I'll get up there sometime in the cold, but since I'm driving 6.5 hours, I prefer more predictable weather.