Here are a couple that I've made. The first graph shows that over the past 20 years the coldest extreme temperature in BC (for example) typically gets down to -42 to -44 degrees in any given year. For the Yukon, a typical years see a temperature below -52.
The second graph shows how hot it gets during the summer. BC leads the back with an average extreme maximum of 40.6, 2 degrees above 2nd place Saskatchwan.