Hot. 98/77
So the Fri/Sat avg temps were 92.5 (record) and 87.5.
This Sat and Sun were 88.5 and 90.5. So technically 1975 was barely a hotter 2 day stretch.
That July 1911 heat wave had the consecutive day peak on the 3rd (90.0) and 4th (89.0). That ties this 2 day stretch, but that was on a Mon/Tue.