Hiya Fellow Nep Heads-
A fellow nep grower created this chart for his own reference, but I asked if I could share it with other growers and he said yes, but remember this is just a general range, not something set in stone.
The author mentions: "They show typical day and night temp at each extreme of the altitude range and the big band in the middle gives the day / night extreme at the average altitude of its range. They are all theoretical (i.e. I didn't go there and measure it) and they don't take into account the attitude of the plants to the sun! So use with caution."
Hope this comes in handy.