art from boulder on 6/27/2017 9:34:34 AM:
The calmest weather would be early September, that is the low season for thunderstorms and you have a better chance of getting some calmer days. You can also have long stretches of calm dry weather starting in early July but expect the days to be in the mid 90's and the wind always blows 10 to 12 MPH even on the calm days