I live in the desert and grow in an outdoors shed. Summer temps get to 115f daily, with humidity at around 10%. Even with an a/c unit blowing directly across the tops, can only get daytime temps down to about 90.
Normally (spring and fall) I water with 1/2 gallon or so of water every two or three days, per 3 gallon pot.
During the summer, requires an increase to 1/2 gallon every day and raising the lights a couple of extra inches. As long as I keep them hydrated, have had no significant problems. Also, I only spray the middle and lower branches so as not to scortch the tops.
Been doing this sucessfully for a few years now.