When one looks at the APS website you expect the usual lies and excuses about why they rape their customers but you wouldn't expect it to be so blatant. Here are their pat answers, none of which explains what they are really doing. They got the corporation commission to give them a 30 percent rate hike which isn't mentioned in the usual bullshit. One of their CSR's tried to tell me that air conditioning works on a degree system and not kilowatt hours (costs the same for the same time no matter what temperature it is) and told me your bill can drop 3 percent per degree.
They actually expect poor people who use a evaporative cooling or live in a place with central air (a chiller system that cools the whole building down at the owner's expense) and a fan only and don't use their air conditioning at all to believe that the seasonal temperature somehow made their rates go up. Here is the standard BS from the liars and crooks at APS from their website.