Starting to hear a somewhat squeaking sound under the hood, which is noticeable at idle. Seems to be coming from the belts/pulleys. The car had new belts installed about 15k miles ago, but the squeak just started. Any ideas or suggestions?

 

since its getting colder, tighten them up!

 

Yea its the cold. I bet it goes away after the car heats up a bit. Tighten and spray some belt spray on it. usually found at your local auto shop.