If your guitar is not brand new, it will still require some maintenance every once in a while. Over time, your guitar will suffer from wear and tear including, warping of the neck, wearing down of the frets, dried out fretboard, fret buzz, etc. It is good to have your instrument checked out because the drastic change is the weather is when the wood in your guitar is going to react the most substantially. If you have not played your guitar for almost six months, you may need to take it for a professional set up to restore some functions. Metal does wear out.  Electronics are vulnerable to surges and can be sensitive to dust. Wood does contract and expand.