You can download all TMY3 files here: http://rredc.nrel.gov/solar/old_data/nsrdb/1991-2005/tmy3/

All design day information is available here: http://energyplus.helpserve.com/knowledgebase/article/View/103/39/design-conditions-definitions-annual-for-all-ashrae-2009-design-condition-locations