I hope the trip is going well. Im near Indianapolis, Indiana, if you need a place to stop by, let me know. Lots of cool places to ride here.
The current temperatures are in the 30 to 50s Farengheit at this time, in the 20s at night. Watch "for black ice" if you are taking secondary roads/older blacktops/in the upper midwest. It can get icy on those roads or just about anywhere in the late winter, early spring (ie now). This is true especially in the late evenings and early mornings, (black ice: its slippery, it takes you by surprise, especially on curves and over bridges). Another concern is deer, they are in abundance in the midwest... usually come out at dusk and dawn.
Its great to see a compatriota riding north. Try to cover as many national parks as possible, they are all awesome. Each state has wonderful ride worthy places, take the time to explore. The same holds true for Canada.
Take care and ride safe!