i bet the actual air temp at the cold side of the condenser was down in the 60s or colder...the LACK of real insulation in the roof and that big library window up front, makes it a real killer to keep cool
my wife made a "heat shield" for the front to supplement the roll down shades.
its a layer of foam foil insulation between two fabrics, one side is deer the other is tropical fish
depending on the mood is the side people see, it helps somewhat
put snaps on the board above driver and it hangs off those , it rolls up and goes in basement when not needed.