Rescheduling Date

Alright so it looks like we may have to reschedule to 2021 being in NY... I am having difficulty picking a new date because of the very limited dates available. We have the option of August 14th or June 5th. Our ceremony is in an air conditioned church and our reception wouldn't start till 6pm. Our venue is an outdoor pavilion type building (I’ll attach pictures). I am worried about August 14th being to hot (although it would cool down as the night went on ) but also worried June 5th is going to be too chilly for guests. They do have little heaters and can shut the flaps. What would you guys do? I’m so indecisive and want what’s best for our guests!!