Vivid autumn colour display in the UK this year following dry & sunny September

[Nick F]

A look at what's behind the display of vivid autumn colours this year

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[4wd]

Was it actually dry and more sunny than usual through September, it certainly didn't seem like it here.
August was well above average rain and September only down about 25%.
A more significant factor seems to be chilly nights and not too windy through October which lets them build up rather than being blown away every few days.