Does climate change threaten colourful fall foliage?

The leaves in London seemed to shift from green to red, yellow and orange much later this year than in past years.  I decide to google this apparent change. 

I discovered that cold October temperatures may be the biggest driver of the fall foliage colour change. Other factors such as the shortening day length, latitude and precipitation are all secondary. It seems no one knows the specific impact global warming will have on our northern forests.

According to The Washington Post, in recent years extreme weather has dulled the colour of the leaves and in certain years the colourful fall season has been severely shortened.