A humidor is a tightly sealed box where a microclimate is created to ensure a stable relative humidity (RH). The ideal relative humidity for cigars is anywhere between 65% and 72%. Cigars are made and rolled in tropical climates and they need a humidity and temperature that simulates that of their place of origin. If you leave a cigar outside in your 30% humidity weather, it will dry, break, unravel and taste harsh and bitter. If the humidity is too high your cigar will absorb all that moisture and develop mold and its taste would be ruined as well. This is the reason why you need a humidor.
