With good airflow and fans indoors and a decent static rh 50% or below I wouldn't be to concerned about my plants getting wet. That's in a controlled environment... outdoors if theres no wind ,hot and humid outside... and u go throwing water into the mix it could be creating ideal conditions for botrytis or PM to germinate and take off. I'd say outside it would vary depending on the conditions,weather ect lots of variables. Happy growing and stay lit fam