I live in the French Riviera and the printer is on my balcony. I have it partially enclosed (the balcony) but most of the time a window or 2 are open.

Never had a problem so far. I usually don't leave the reels on the machine when I don't use it and just put them in a plastic box with desiccant bags.

While temp is 35°C in average during the day in summer and roughly 10°C in the day in winter, the humidity level stays around 50% year round.