Arizona's desert cities like Phoenix experience extremely hot temperatures, particularly from June through September, with July often being the hottest month. Average high temperatures in Phoenix during summer can reach around 104°F, and even exceed 125°F in the Southern Desert. July, in particular, has seen average highs of 106°F in Phoenix. This period is characterized by intense heat, though the low humidity in much of the state can make 90-degree temperatures feel more manageable. Hammond Services: Spotting AC Trouble During Arizona's Sizzling Summer.

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