Hottest temp for me was about 104-108°F (40-42°C) in the Interior of Southern BC between Kamloops and Cache Creek. Fortunately, this was a dry, dry heat. These kind of summer temps aren't terribly unusual in this part of Canada because it's actually semi-arid down there. It's been known to go up to 111°F.
Because I grew up part of my life in Edmonton and also northwestern Alberta, I'm familiar with extremely cold temperatures. I've been through temps down to -45 to -50°F many times. I've even been to Boy Scout camps in unheated cabins and tents in temps down to -40°F. The coldest I've been through was -58°F (-50°C) near Grande Prairie, AB and in Dawson Creek, BC. That was without the wind chill, mind you. In fact, there was very little wind, if any, at the time.
Worst windchill was about -94°F (-70°C). This was during an unusually heavy blizzard (blizzards aren't very common here, actually!) in Edmonton, and it was about -40°F at the time. Windchill of -50°F to -75°F are not unusual in the Canadian Prairies. The cold is typically a very dry kind of cold, not damp.
Summers in Edmonton can be hot though. I've seen temps up to 95°F there. And it's usually a dry heat there.