One or two days a week I jam with some friends after work. Where we play is right by my job so I usually bring my bass with me into my office. Between my immature coworkers wanting to play with it, and walking out of the office without it because I'm very forgetful, I'd rather leave it in the car. Is it really bad to leave the bass in my trunk for 8 hours? I park in an covered garage, away from the sun but right now in New York it's fairly humid and hot. Generally between 75 in the morning to near 90 mid afternoon with moderate humidity. Is 8 hours, one or two days a week enough to warp the wood? What about the cold when winter comes around? Theft really isn't a concern. It's gated and I know everyone that parks there and it's all on camera. I'm more curious about potential damage.