Phalaenopsis are perfectly fine in a temperature range of 60-85 degrees. They are fine with a range of 50-60 degrees, however frequency of watering should be cut back.
Conversely, if the temperature rises over 85 degrees, Phalaenopsis need protection in the form of air movement and more frequent water.
The shorter the time frame of either the higher or lower extremes, the less stress occurs. Prolonged exposure to the extremes can lead to damages caused by the stress.
