If you want American history there is always Niagara Falls, America side. I know some people don't feel that its worth going to but its a lot of time a day trip for us.(we live 2 1/2 hours away) During July on the weekends they have fireworks. Go to Lewiston and they have locks and a mine tour. We want to do that sometime. There is also an Artpark that direction, Old Fort Niagara. It not action packed but there is a lot of history there. There is an amusement park small but enough for a day. If you research it on line there is inexpensive and free stuff to do that we enjoy anyways. There is also a pass that you can get that will get you into the cave of winds, maid of the mist and they have a movie that i think its an IMAX type movie.

In short its just my suggestion. It isn't any hotter there than anywhere else in July.