| All of your summer conditions sound find to me except for the 40% afternoon humidity. That sounds low to me, especially for Phals and Paphs. That low humidity level will cause mixes to dry out faster. You may find that you have to water more frequently when you move your plants outside for the summer.
made4engenering may have had problems with orchids in temps over 90F and I dont' know which orchids gave the trouble, but when I lived in Michigan and all of my outdoor orchids here in Australia all experience(d) temps over 90F and if the humidity was high enough that the didn't become parched, there was no problem. I started seeing signs of stress when it was that hot and my humidity dropped below 50-55%.
The underlying principal is this: an orchid (be it a paph, phal, or other) needs the conditions it needs regardless of where it is grown and it's up to us to adjust all of the details. So for example if we're growing a mottle leaf paph, which likes to stay gently and evenly moist, indoors in the winter and outdoors in the summer, we might find it needs to be watered every 2 or 3 days in summer but maybe only once a week in winter to maintain that level of moisture.
Does that make sense?
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