After relatively cool conditions for much of autumn in Alaska as a whole, the last week of October brought a change to unusual warmth. Blame a big ridge extending north from the Gulf of Alaska, allowing warm air to be transported northward into the western part of the state and up to the Arctic. Here are the average 500mb height and 850mb winds for the week ending October 30:
And the resulting 850mb temperature departure from normal:
Warmth in Alaska's far north has been an oft-repeated theme in the past two decades, and this year Utqiaġvik ended up with a top-5 warm October, although it wasn't as extreme as 2016 and 2019. Here's the now (I trust) well-known chart of October temperatures there, showing the profound change in the local climate from loss of October sea ice.
For the state as a whole, October 30th was the warmest day of the month in comparison to normal. The figure below shows the widespread distribution of unusual warmth, with the statewide average climbing into the 95th percentile for the time of year. The standardized anomaly numbers reflect my calculations that account for seasonal skewness, as discussed recently here.