June is hot all over America, if that's an issue don't play during the summer.
I've only lived here 25 years but have to second Sam's point.
April and May, September & October are great, June is quite fine, sometimes a little wet in fact... but we always like to get to Michigan in July and miss August as well!
The 2 Tour Championships at Champions were some good payback to JB, and I trust he'll be here in 2020, being an old Marine and all.
Sadly I remember the piper going off into the morning fog in memory of Payne Stewart there...