According to NOAA the ten year period from 2011-2021 is the warmest on record in Vermont. Overall in the last 123 years the average temperature in Vermont has increased 3 degrees. With an increase in temperatures it is likely that we will see increases in extreme weather events including snowstorms. I agree that looking at the number of days with snow coverage on the ground is a better datapoint. The other one is ice in and out on ponds and lakes. While none of the this directly relates to the OP question, I certainly remember in my lifetime that most Presidents Day weekends you had reliable downhill and Nordic skiing, and I am doubtful that will be true in the near future.