Engine Squeek

I have a '06 PT Cruiser. When it is cold or sometimes when it is wet there is an engine squeek. It kind of sounds like it could be the water pump, but it doesn't do it all the time. Can anyone tell me what it could possible be. I don't think it is the fan belt as I just had it serviced and there was nothing wrong at that time.

possible just need to adjust the power steering belt

Is it worse if you turn the wheel? I think the power steering is part of the larger surpitine belt, could be wrong. Test it when you start it up and try and be more specific. Could just be a glazed belt, or be loose. Good luck