Finest Fable's season was never really established despite it being a very important piece of detail. Certain enemies can appear in certain periods of time, only certain crops can grow and the landmarks can be a bit more set up with this information and we've never really bothered to expand on it.
But it's been decided. Finest Fable will be set during Fall. It'll also be really good symbolically as it gives the game a lot more atmosphere and not being the very generic greens of spring without any of its substances applied.
I didn't want it to be a world that was just set up by me, but a living breathing world that progresses through its seasons. Not warm enough to warrant wearing lighter clothes but not cold enough to gear up for winter. 
The game could be very well set in October and everything would simply make sense.