Veg/Flower Temperature : anywhere from 65F-85F should be just okay, ideally 70-75F
Veg RH : 50%-80%
Flower RH: 40%-50%
To be honest, as long as you are near these numbers you should be okay. The best way to dial in your system is to just watch your plants. All strains will grow differently but also how you're growing, you're nutrients, you're outside environment, etc.. will determine how healthy your plant is with whatever temp/humidity you are in. As long as your night and day temperature differences are so dramatic, say >15-20F then maybe you will experience some unnecessary stretching but stretching can be caused by many other factors.
See:
http://www.cannabisculture.com/articles/1536.html
https://www.rollitup.org/t/temperature-humidity.51378/
https://www.rollitup.org/t/temp-and-humidity.417674/
Hope this helped!!!