By Denny Dyroff, Entertainment Editor, The Times The weather forecast is lovely for the next week — sunny days and highs ranging from 75-83 degrees – and that’s great because many of the popular events on this weekend’s calendar are outdoor activities. The Chadds Ford Historical Society’s “Valley Jamboree” is scheduled for May 18 and 19 at the Barn Visitors Center (1736 Creek Road, Chadds...