After Jimmyay's comment on summer including September, I would consider summer as May to September. Long bright days of May and warm short days of September. I've rated the summer as 7/10 even here in North west England. Prompt start in May, great June, and welcome rain in July, and not cold (OK after June, July was a shock ). Another survey at the end of September would prove interesting. A fair August and warm September may even add a further 2 points !