Heat waves in NYC: 3+ days in a row at 90°F or hotter. Fri, Jul 23, 1999: 92°F / 72°F Sat, Jul 24, 1999: 97°F / 79°F Sun, Jul 25, 1999: 97°F / 77°F Mon, Jul 26, 1999: 93°F / 75°F Tue, Jul 27, 1999: 96°F / 74°F Wed, Jul 28, 1999: 97°F / 71°F, 0.03″ rain Thu, Jul 29, 1999: 93°F / 74°F Fri, Jul 30, 1999: 92°F / 73°F Sat, Jul 31, 1999: 90°F / 75°F Sun, Aug 1, 1999: 98°F / 79°F Mon, Aug 2, 1999: 90°F / 71°F Source: NOAA GHCN-Daily, Ny City Cntrl Park (USW00094728).