Hi Harvey,
Our daytime temps during the summer sound about like yours but like you mentioned, our nighttime temps (and humidity) are a good bit higher.
If you want to look at the temperature numbers for my location there is a great site at
http://www.griffin.uga.edu/aemn/cgi-...N.pl?site=GASA. If you scroll down to Historical Data link you can get a lot of info about the climate in our region.
One additional thing, I got 4 pups from this plant this year.
Richard