By Arctic standards Hay River is in the sunny south, on the shores of Great Slave Lake, a name probably not long for the atlas. And unlike many places on our tour of the far north we can detect a warming trend in the January average daily highs. However it mostly happened before 1940, as the chart below (which starts in 1894) shows.

Now here's February:

And March:

Compared to the first decades of the 20th century Hay River looks to be a smidgen warmer, although we can’t see any trend since the 1980s. But our wise rulers insist winters are turning to scorching heat in the Arctic. So we’ll keep searching for a place it actually happened.