One day every week I have to take my bass to work, so that in the end of the day I can take it to my lesson. The thing is, at work the car is parked outside and I was wondering if leaving the bass there all day could harm the bass. Right it has been raining a lot, but when sunny days come, should I take it inside with me? Note: The bass is in a bass bag (not hard case) and is on the trunk of the car. Cold days: 8-17 ºC , Hot days: 25-30 ºC.