I've drop my catts down to the 40's and they take full sun from morning til it moves off - Be sure to adjust the lighting hrs. Don't toss any orchids into the sun without some adjustment time, Or they will burn like a babies bum
Some catts like to dry out more then others - some like to stay rather damp. Smaller catts need to have more moisture. Some will rest in the colder months for a couple of weeks per time.
Phals and catts are very different (IMHO) catts are a much tougher orchid and can be easier to deal with in my experience
They're wonderful orchids