Some of Richmond's hottest summers were also ours, fascinating how this kind of intense early heat was a harbinger of things to come in many of these historic summers....
Records:Highs:EWR: 99 (2021)NYC: 96 (1991)LGA: 96 (2021)JFK: 98 (2010)
2010: The maximum temperature today at the Richmond International Airport was 102 °F which not only broke the record high temperature for the date, but was close to the 104 °F record maximum for the month of June. Both June 27th and 28th had a maximum temperature 102 °F. Richmond has never had back to back 100 °F plus days before in June. Only three June days have been hotter: (June 30, 1937 103 °F) (June 19, 1944 103 °F) (June 26, 1952 104 °F ) June 2010 also had 19 days of 90 °F or hotter temperatures the record was 20 in 1943. The Richmond International Airport reported the mean temperature for June was 81.1 °F which was a new 113 year record. This breaks the old record of 79.2 °F set in 1943 and was a +8.7 °F departure from average. June had 8 new daily temperature records and all were for heat. (Ref. Richmond Weather Records - KRIC)
2010: Richmond, Virginia, set record for the most days in June reaching 102 degrees F (June 24, 27, and 28). (Ref. Weatherwise U.S. Weather Highlights of 2010 page 8 )
also looks like the extensive heat of 1980 started in Texas around this time before moving north and east.
1980 - The temperature at Wichita Falls, TX, soared to 117 degrees, their hottest reading of record. Daily highs were 110 degrees or above between the 24th of June and the 3rd of July. (The Weather Channel)