Average Temperature Outlook for ANCHORAGE (issued in September 2017) suggests that during Oct-Nov-Dec 2017:

There is a 99% chance that the average 3-month temperature will be within the range of 17.3 and 32.5 Deg F,.

There is an approximately equal ( 53.0%) chance that the temperature will be higher than the climatological median* of 24.9 Deg F, and an approximately equal (47.0%) chance that the temperature will be lower than the climatological median*.

*For the climatological reference information, the median statistic is reported. The median value means that during the present climatological reference period (1981-2010), half of the years (50%) temperature was greater than the median and in the other half (50%) less than that.