Don't know the ideal temperature to bring them in... Given the size, the later the better, of course. (Maybe you could hang them over the bathtub to make watering less messy) I suspect that as long as you can give them shade, the temperature becomes less critical if you can keep them wet. I'd definitely defer to anybody who grows these in a truly warm climate... mine grow under a much more benign temperature range so I don't know where the limits might be. I know that they are grown quite well much farther inland in southern California, where there are triple-digit (F) days, but nights do still cool off, and June/early July they still get some June gloom. Thinking of the Huntington Botanical Gardens.
So go for shade and copious water,
misting if you can, you might just get away with it! Those look like really healthy plants. Wishing you success!
---------- Post added at 02:26 PM ---------- Previous post was at 02:12 PM ----------
In fact, thinking about it, you might send an email to Brandon Tam at the Huntington and find out what he does. It's not quite Texas, but summers get pretty hot there and the Stanhopeas do quite well. If you can't find his email in Orchids (or other AOS source) or in the Orchid Digest, PM me and I can provide.
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