I'm not an outdoor grower but you can get misting systems for outdoor areas...Thinking of getting a green house and growing out doors but we get many 100+ degree days in summer.. thoughts?
Not saying mist the girls but you could mist the greenhouse interior or exterior to cool if you can control humidity effectively
DIY evavap cooling!
Even drape appropriate shade sail material (pick an open mesh so light doesn't get to blocked) and keep some moisture on that even would pull temps down I'm tipping!