When do discounts for the fall usually come out? sept
This last year they came out in Late April or Early May for Sept and October and late July for the rest of the year. Although FD came out in Early may for the rest of the year.
To an idea, check out the Historical Discounts at MouseSavers http://www.mousesavers.com/historical-information-on-walt-disney-world-resort-discounts/#codetrends