Gender is what actually gets expressed â how we look, how we act and how we feel. While sex is determined by what is written into the chromosomes or what is dictated by our biology, known as genotype, it is the interaction between the genes (genotype) and the environment that determines gender.
Here are the average temp in Yosemite Valley (where CV is located) by month: www.nps.gov/yose/planyourvisit/climate.htm. Also beginning of September is usually still quite warm. Nights can have a bit of a chill, but nothing a couple of blankets can't handle.
Sept. 3 is Labor Day, and many hotels will be crowded. I assume you have accommodations in Yosemite booked, as they will be crowded even after Labor Day. Temps in Death Valley are more likely to be down to about 80F at night, not as a high during the day, and up to 110F during the day.