I'm new to growing but I am 99.99% sure you can not dry outside what's so ever!! The sun will bake your bud and kill the thc trichomes and leave your bud all dry and crispy. If you don't have a place to dry as I do what h plan on doing is building a box that I will be able to leave outside and dry weed in. Take one those big ass storage containers that have the detachable tops, usually a rectangular shape and there at like every Walmart, find a way to hang your bud from the lid of the container then cut 2 holes on each side and get a fan that blows towards your bud from outside in the fresh air then another fan that's blowing outside the box so you will get best air flow possible. Leave the box in the most shaded part possible then you should be good to go. But by the way, I've never personally tried this its just an idea I do plan on trying it this season but from what I know about drying weed that has all the type of conditions you need for drying