25C days in August have been as rare as hens teeth here since 2007, with only the 3rd in 2011 and 1st in 2013 topping it. May and September have done it more often since then, and the 1st of October 2011 was hotter than any August day between 2004 and 2013.
And September sunnier than August seems to have become the norm since 2006, happening 5 years out of 9 since, including in 2008 when September was the dullest since 1993.
We are seriously due a decent August!