Like @MIGrampaUSA talks about Michigan... pretty much they have to deal with that every year. I think he is bang on but trying to improve all of the others is also a good idea.
It's worse than normal this year. June was hot and dry. So dry that we were in drought like conditions. End of June on through until now, it's been unusually hot and extremely humid. Typical Michigan weather is much dryer July on through about the middle of September. Rainy days. Cooler nights. Wet greenhouse glass from condensation. October brings plenty of rain and overcast days... and nights in the 40's down into the 30's. It sets up a scenario where WPM, bud rot, and fungus thrive.
The answer: In a more typical year ... Smaller, earlier maturing plants that finish in very early October. This year? Without either state of the art technology or an insane effort, it will be difficult to avoid these issues even if you're doing everything else right. Good genetics and healthy plants will only get you so far. The rest really is up to mother nature.