After almost a year of seeing your post someone will finally reply to you, ME.
The July wind sucks around here, it's hot humid and no wind. Maybe a storm front the passes by every other week. The humid winds are out of the West, SW so Michigan is best Maybe.
Sheboygan has thermals late in the day till evening at unexpected times, so we here in the Chicago area are called "Wind Chasers". (anyone want to make a documentary?) Kinda like "Storm Chasers" but with less danger. The bottom line
is in July put Helium in your kite.