In message .com,
"Steve J, BWS" writes

True Tom, but it is a term much over-used by the press here, and should
really only be used once we are in October or November.

Despite the climatological definition of autumn, early September should
be still capable of late summer warmth that is anything but
exceptional; we even had 34C+ in September 1911 in Coventry!

I'd be very surprised if we get anything above the mid-20's though -
unlike July, there doesn't appear to be a source of extremely hot air,
and besides, the nights are rapidly lengthening.
--
Paul Hyett, Cheltenham (change 'invalid83261' to 'blueyonder' to email me)