So I live on the east coast of New Jersey, along the shore (no, we don't all talk like the way they do on the show

) anyway- with global warming and stuff, whatever, the weather has been sparratic. Unpredictable. One day it's 30, the next it's 75, humidity changes every day
With summer coming it will be HOT. My room is also very HOT.
The air in my house changes often too- it's too cold in the morning, turn it hotter. Too hot during the day, turn it colder.
What's the best way to keep my guitar in the best shape climate wise. I understand setups are required through changing seasons, but how should I keep this guitar in terms if what will be best for each season?
This should be with the prospect that I have no access to humidifiers of any kind, no access to any air conditioning unit seperate for my room, and try telling a house full of my family that we have to keep the temperature at the same all day. They already hate my guitar as it is