Violins don't like rapid or large changes in either temperature or humidity.  The absolute temperature or humidity matters less than how rapidly it changes.  My teacher recommends not taking a violin out when it's going to be over 35C, though. It can cause the glue to loosen.  That's not catastrophic (a luthier can fix it easily), but with a student instrument, the cost of the luthier's time to do it might be more than the cost of the instrument.

Usually, the best plan is to leave the violin in the case while it's in a new environment and let it come to the new conditions gradually that way. Don't leave it in the interior of a car, though, as the greenhouse effect of the car will shoot the temperatures up enough to cause the glue to start melting. It can also melt the rosin on the strings (or in the case), which isn't harmful, but is fairly messy.  I'd keep it in its case in the shade when you're not playing it. (The shade of a tree, by preference. Tents are a lot warmer. Watch out for how the shade shifts, though.)  Overnight, I'd keep it in a trailer as a first choice, tent second.

Don't play too near the fire (changes of tempeature) or the lake (humidity). Most of all, remember it's a student violin and therefore didn't cost a ton of money, so don't fret about it too much. Just have fun with it.