My Phoenix has Drum brakes in the rear and they sometimes squeak and sometimes they do not. I'm curious if that means the brakes need to be replaced or they are just squeaking because of moisture that is getting into them and has not yet evaporated. (It was above freezing here in NE the other day so the everything was wet)

The brakes are relatively new so im wondering what exactly can be causing it. Altho I do believe it is just moisture.

If the brakes are new, either the shoes need to be re adjusted, or that's just the new brake pad material.

New shoes? New hardware? New drums?

IMO, on such an older vehicle, I would have replaced pretty much all the parts, especially with a new hardware kit.