For context, the graph William posted is for the area north of the 80th parallel. I've marked it in red on this copy of today's arctic sea ice extent map:
Back on page 7 of this thread, in January, William was reporting how cold it was in the Great Lakes region, and how canals in Holland were freezing, and I pointed out how it was above average temperature in the high arctic, at Alert, Cambridge Bay and Resolute. The point was not to argue that it is getting warmer, but to get him thinking about the regional extent of cold air masses that bring extreme temperatures. But it's interesting, on William's chart the area between this year's daily line and the average appears to be much more in the positive than in the negative.
Compare the following two maps. Again, I've added the 80th parallel in red.
The weather stories William recently posted were about Churchill and the Hudson Bay area, as I recall. That would be on the right side of this map for May:
Unfortunately the scale of the two maps varies, and I don't know why they differ. It would be nice if the second one showed all of Hudson Bay.