questions
They had been rendered sludgy and stupid by the fall temperatures, but Jack, who knew about wasps from his childhood, counted himself lucky that he had been stung only once. And, he thought, if Ullman had hired the job done in the height of summer, the workman who tore up that particular section of the flashing would have gotten one hell of a surprise.
Question 1: In this case, what’s the meaning of ‘fall?’ ( autumn? )
Question 2: What’s the meaning of ‘in the height of summer?’ ( what’s the meaning of ‘in the height of?’ )