Heat waves in NYC: 3+ days in a row at 90°F or hotter. Sun, Aug 11, 1872: 90°F / 72°F Mon, Aug 12, 1872: 92°F / 74°F, 0.35″ rain Tue, Aug 13, 1872: 90°F / 74°F, 0.2″ rain Wed, Aug 14, 1872: 93°F / 75°F Source: NOAA GHCN-Daily, Ny City Cntrl Park (USW00094728).