That is interesting, I had kind of wondered about that myself. Quest for Glory IV has a few lines about the fall climate, and the Burgomeister remarks that the days are growing shorter and Winter is approaching. The first two games fit the connection well also, although the tie-ins to different cultures is even more obvious in terms of the game settings. I'd look for some interviews by the creators or some primary sources on that one, there are a lot of interviews online and the Coles themselves are still around luckily.