There is no restriction on when to buy a humidifier. You can use it in any season, though you must note some peculiarities.u003cbru003eu003cbru003eFor summer: The humidifier is not popular in summer since the air is humid and hot already. There is always a drop in sales this season. Since it's in low demand this season, a lower price is probable. You could plan and save ahead by making a purchase now in preparation for spring, fall, and winter.u003cbru003eu003cbru003eFor winter: You need a humidifier more than ever in this season. The humidity level is generally below 30%. Due to the cold, the heaters are always working, while the windows are closed. Hence, there is improper ventilation. The humidifier comes in at this point, improving air quality. The best duo during winter is the heater and humidifier.u003cbru003eu003cbru003e