Any higher than 12.5C would put it in the all time top ten. Seven out of the top ten Octobers have occurred since 1995 which is a remarkable stat especially when you consider that the equivalent number for May is zero.
That is after the 7th warmest September so potentially two top ten months in a row.
Warmest autumn on record was 2006 with 12.63C, so with Sept at 15.9 and Oct at 12.5, November would have to be 9.5 or higher to beat that record. That is top 3 or 4 territory but you never know.