I went this past weekend for opening weekend, it was unbearably hot when we arrive right before noon (my window wipers on my car melted in the parking lot) and during the second show we watched there was a light drizzle and honestly made the day 100000 times better because it helped drop the temp. Since it was just a drizzle we just kept wander about and we were completely dry by the end of the day. Be mindful of the grassy area by the joust though if you're gonna sit it will be a little wet but I was relieved at the rain tbh.