as soon as the fall temps start to hit the low 50'sF down into the 40'sF there because a very noticeable squeal when I press down on the accelerator. It's rather annoying and I would like to find a way to solve it if possible. any ideas what it could be?

 

Location location
I like to squirt lube on each pulley, 1 x 1, till located.
The lube with the straw
Make sure the tensioner pulley is doing its job

 

X1 the same but I use water spray until it goes then I know which one is squealing. Sometimes it's a dry bearing creating mayhem.