On 25/09/2015 20:01, Graham Easterling wrote:
The warmest September I've recorded was 2006 - 17.2C
The coldest were 1992 & 2012 - both 14.0C. This month will end up fairly close to the coldest.

My mean temperature for this month now stands at 13.9C. This makes it
the coldest September mean I've recorded since before 2005.

My warmest September was last year with 16.7C and my coldest (prior to
this month) was in 2008 with 14.2C.

As with the rest of the summer, it has been the cold nights that have
dragged the mean temperature down whereas the days have been around average.

--
Nick Gardner
Otter Valley, Devon
20 m amsl
http://www.ottervalley.co.uk