PORTLAND -- Streets and yards are usually filled with fallen leaves by Halloween, but this year the leaves have been staying on the trees longer.
Arborists said trees have been about two weeks behind their usual seasonal schedule. They're also producing some of the most spectacular fall color displays in years.
"We had a nice warm spell late summer. You've got leaves holding a lot of sugar and so, the leaves are holding longer and producing nice color this year," explained arborist Damon Schrosk with Treecology, Inc.
Meteorologists believe several weather events likely added to the change, including wet conditions into early summer and a wetter-than-average July. The combination of late summer heat, the sunshine back in September and mild nights the first two weeks of October could be responsible the late change, too.
Most low temperatures October 1st through the 15th were 50 degrees or warmer at the weather recording center located at Portland International Airport.