One of the city's best neighborhood summer markets is going autumnal. The Pacific Coast Farmers' Market Association announced late last week that the Wednesday Castro market will continue through Dec. 22. The market began its season in April, and was supposed to have wrapped it up Oct. 27. Now, says the PCFMA, the market will set up again week on Nov. 3 in its regular spot on Noe (between Market and Beaver), and return every Wednesday till just before Christmas. Only difference: The fall market begins and ends an hour earlier than the summer one, 3-7 p.m. instead of 4-8.