Boring weather fact – if you look at sunshine rather than absolute temperature, September is usually a better month than June. It’s only a broad adherence to the old fashioned thinking that a/ each season is 3 months long and b/ they have to be full months; which is a throwback to older days and being able to compare weather stats against times when rainfalls, etc. were kept by month.
Hence why broadly speaking we think summer is June/July/Aug, Autumn is Sept/Oct/Nov, etc. If you look at more detailed info and assuming we’d compromise a bit of temperature in favour of dry weather, then ‘summer’ should really be late June through to end of Sept.
As explained to me by a friend who worked at the Met Office in Bracknell, so don’t blame me if it’s not an exact reflection. And yes, as well as being dry it’s also lovely and warm too currently …..