Heat waves in NYC: 3+ days in a row at 90°F or hotter. Sun, Jun 27, 2021: 90°F / 73°F Mon, Jun 28, 2021: 92°F / 76°F Tue, Jun 29, 2021: 95°F / 78°F Wed, Jun 30, 2021: 98°F / 73°F, 0.65″ rain Source: NOAA GHCN-Daily, Ny City Cntrl Park (USW00094728).