No August is not the start of Autumn

Seasons are based on plant growth - which is based on available sunlight.

Length of daylight is objective - it can be measured, modelled, and is predictable.

"Weather" is inherently unpredictable - if you tried to model your seasons around weather you'd end up changing the definitions every year after a snowstorm in March or a warm spell in October.

The weather may be better in May, but it's only about as warm as September.

For a country like Ireland surrounded by water, our highest temps can often peak even later in the year than other places in the Northern Hemisphere. (Seasonal lag).

People living on the coastal fringes will often see their highest average temps around late August/early September. Its akin to March seeing more falling snow than December.

Let's put it this way... the rain in August tends to be warmer than the rain in June!

Halloween sweets / masks or section boxes in the shops yet? Only signal for the end of summer....