With temperatures barely in double figures and a biting northerly wind, today has certainly felt more like the middle of October. But it doesn't really look like Autumn.
The trees still seem to be remarkably green - especially when compared to the same day 6 years ago.
To find out if we are actually behind, I met David Bentley from the Hampstead Heath conservation team.
So, why do trees drop their leaves in Autumn?
Until today, so far this Autumn we've had very light winds as it started to gust the leaves started to fall.
So Autumn may be a little delayed but the colours will be worth the wait.