When is the first day of fall in Pennsylvania? When foliage starts to change

Cumru Twp, PA - October 27: Orange and red autumn fall foliage leaves on trees along Philadelphia Ave in Cumru Township change colors Wednesday morning October 27, 2021. (Photo by Ben Hasty/MediaNews Group/Reading Eagle via Getty Images) PENNSYLVANIA - Fall officially arrives in Pennsylvania on Sept. 22, but the first signs of the season — cooler nights, changing leaves and packed apple orchards —…