According to NOAA, NASA and several other reputable sources, 2016 was the warmest recorded since 1880 when they started keeping track of these things. In fact, 2016 was the third year in a row of record breaking temperatures. I'm writing this in Durango, Colorado on March 20th and its 71 degrees outside... not normal. No snow in my yard and there should be.
Its probably just a coincidence, but I think burning less coal can't hurt. Since most of the electricity generated in this area is from coal burning power plants, solar panels on your roof can have a big impact. So if you like cold and snow and skiing, only in the winter of course, think about making some of your electricity from sunshine instead of coal.