The most forgiving strain I've grown is blue dream. Its mold resistant as well and very sturdy. A good choice for a beginer.
Power Plant from Nirvana was also one that I grew for several seasons. Not as mold resistant as the blue dream, but an easy grow with very good yields. It was my first attempt at outdoor growing and I ended up growing it for several seasons due to its hardy nature.
I've also had good results with c-99, my favorite daytime smoke. I only planted one outdoors last season, but I got 1 1/2 lbs off of it. (Ive grown c99 indoors for several years). I like c99 due to its short flowering time. I planted it around june 1 and harvested around the end of oct. which was good because we had some really wet and windy weather in November which shredded several of my plants which took longer to flower.
The midwest covers a lot of territory, with a multitude of climates, so you have to make the decision based upon your local weather conditions. Is it windy? do you get early or late frost? Is it usually very humid around Oct or Nov? All these play into your choice of strain.
Sorry I couldn't be much help, but I can only go by what I've experienced where I am at. Just keep reading the forums and check out other peoples grow reports to get a good idea of what youy will run up against.