Another perspective on the unprecedented warmth is to look at the accumulation of freezing degree days so far this season. Barrow has managed a grand total of 4.0 FDDs so far this autumn, which is easily the lowest on record (2012 had 24.0 through October 12). On the flip side, thawing degree days have accumulated at a record pace this month, with 24.5 TDDs for October 1-12. The chart below shows the numbers for each year since 1930 (click to enlarge).
Here's the current webcam photo from Barrow - no sea ice and no snow.
Away from the warming influence of the Arctic (an odd concept, perhaps), freeze-up is beginning on interior rivers. The webcam photos below show the situation on the Yukon River at Dawson YT and at Beaver.