Every time that i remember getting stoned there was some unusual thing happening, try changing up your sorroundings a bit and your experience will be better. And the hot dry air thing? I dont know about all that man, i've been stoned on clear nights, hot dry days, and rainy night-days or whatever iteration you can come up with, hell i've been stoned while getting stoned (hail) but really the weather hasn't made a difference, just be comfortable and enjoy where you are.