Re: How does weather may affect a project?
No, no and no.
What you are proposing will ruin the instrument.
Guitars made of wood need to be kept in a temperate climate. No extreme temperature changes (inside to outside), steady 45% humidity, out of direct sunlight. This does not even address the needs of finishing which are even more stringent.
I suggest you go to the library and get a few good books on wood working and lutherie. Study them for a while, make a shop in your apartment and continue with the build or whatever you are doing.