The effect your location has on you is far greater than people give credit to.

I can’t stand cold weather, every year for 5-6 months in Melbourne I would just not be mentally right because of the cold. People would mock me for wearing scarfs and gloves and heavy jackets (considered overkill in Melbourne) but I didn’t care because it made something I personally found intolerable, slightly better. Come summer, my general mood and well-being would always be much improved and what I realised to be normal for me.

You need to understand yourself to be able to properly grapple with this, but a change of scenery/location can be very reinvigorating.