Squeaking noise on very humid days?

I get a squeaky noise from the pulley areas on very humid mornings(rainy morning) or just high humidity days. It will go away after a couple of minutes of driving. I can not figure what it could be since it only does it on very humid days? Any ideas?

 

probably just condensation on the belt from the humidity. That could cause it to slip on the pulleys and make the noise you here. It happens to me after i wash my truck and get a little mist from the over spray on the belt. But thats just my 2 cents.

 

the belt.mine did that for the last 30,000 miles.i finally got tired of it and just bought a new belt.i tried everything,nothing fixed it.

 

I do have probably the very same problem!
When i start it after it s been sitting for a few hours,then that squeeky noise is on for about five minute top,then goes away.
I was told that it could be my accessories belt that is going?
It is going in at Toyota s Dealer for a oil change in about two weeks,i will ask them to check it out.
My Tacoma is a 2007 V6 4x4 with 91,000 kilometres.
Thanks
Charlot

 

Had the same problem on my truck @ 50k. It would also only squeal when cold.
I got tired of hearing it so just swapped the serpentine belt and problem solved!
Cost around $30 and took 20 minutes to install from popping the hood to firing it up.