Heat waves in NYC: 3+ days in a row at 90°F or hotter. Wed, Jul 16, 2008: 92°F / 70°F Thu, Jul 17, 2008: 93°F / 72°F Fri, Jul 18, 2008: 94°F / 74°F Sat, Jul 19, 2008: 96°F / 78°F Sun, Jul 20, 2008: 94°F / 75°F, 0.01″ rain Mon, Jul 21, 2008: 92°F / 73°F, 0.01″ rain Source: NOAA GHCN-Daily, Ny City Cntrl Park (USW00094728).