The warmest day of this month in Coventry has just been 16.5C (24th) -
this is the lowest such value here since 1974, even though this will be
an October that is warmer than the 30-year mean (+0.3C).

It shows the temperature has been fairly uniform and the month has been
similar here in Surrey. The highest was 16.6°C on the 24th.
A similar example is June 2003, which is the warmest June in my record
(starting 1983), but the highest max was only 26.6°C. This is only 4.4°C above
the mean max for that month, and less than the average June highest of 27.1°C.
I reckon members of the public did not think of June 2003 as particularly hot,
due to the absence of very hot days.

Tudor Hughes, Warlingham, Surrey, 556 ft.