I always find it a bit crazy that there are two different ways of timing the beginnings and ends of the seasons. Meteorologically speaking Autumn started on the 1st September but astronomically speaking the change varies slightly from year to year as it takes the Earth 365 days 5 hours and 49 minutes to travel round the Sun. The astronomical change is on 22 / 23 September.
Whichever you choose to follow this three photo stitched panorama was taken a week or so ago of a Summer blue sky and clouds over a corn field:
7 hours ago