We were there in August with some serious temps, up over 100 before the humidity making it feel warmer, not a drop of rain to cool anything off. We survived but not sure we'd do it again unless it was our only option. We had gone the previous August and it was hot but totally manageable for us- so much so that we were brave and scheduled an August 2023 trip and it was night and day with the sun beating down on us for 8 straight days. I wanted to enjoy some places (like Main Street) and we just couldn't- we were walking through shops to stay in air conditioning and jumping quickly from shade to shade before we wanted to kill each other.
So, I'd say high 90s? Fine. Triple digits + humidity? Eh, I'd rather not.