if you follow temperatures as closely as i do, you would have seen that we had a very late summer, it was not that hot well into mid April, in fact we may have had a similar thread on how the tempeartues are lovely in May !
IIRC, max during June was almost always under 38C, when its traditionally 42+
The coldest days of this winter was in 2nd week of Feb when its generaly a month earlier, so it makes sense that "summer "will stay longer than usual, so end Sept is like end-August in earlier years.
Expect max temps to fall below 38C only after late October...
Keep getting excited because the cooler weather is supposed to be on the way but then I get disappointed every time I venture out after around 10 am and get roasted!