Heat waves in NYC: 3+ days in a row at 90°F or hotter. Sun, Jul 14, 2013: 90°F / 74°F Mon, Jul 15, 2013: 94°F / 78°F Tue, Jul 16, 2013: 94°F / 77°F Wed, Jul 17, 2013: 97°F / 79°F Thu, Jul 18, 2013: 98°F / 81°F Fri, Jul 19, 2013: 96°F / 83°F Sat, Jul 20, 2013: 93°F / 81°F Source: NOAA GHCN-Daily, Ny City Cntrl Park (USW00094728).