I've kept leopard frogs before, one for 3 years as a matter of fact. They did well in normal room temps 68-85 c (no ac in house). If you experience colder room temps in those humid Ontario winters make sure to have an under tank heat pad. These frogs are largely aquatic and powerful swimmers (large webbed rear legs) I would recommend 50/50 water to land in the container and at least a 20 gallon aquarium or cage but the larger the better as leopards are powerful jumpers and will bounce around inside the cage. The one thing I would like to point out to you is that you may have broken local wildlife law by keeping a native species. I would suggest that if you have not exposed this frog to other species or an aquarium that you return it to the wild where it will do much better than in a tiny cage. I was young and oblivious to law when I kept mine and it seems like i'd be careful about wild collecting specimens especially if it is a protected species so check with your local natural resource office. Rana Pipien holds a special place for me as this was my first herp, however maybe this would be a good time to explore what local breeders have to offer. I know of a lot of frogs that will do just fine as a starter pet (white's tree frogs, Tomato frog, Ornate Horned frogs... etc.) That way you can help keep Canada's precious resources free for everyone else to share I'm not trying to tell you what to do by any means just food for thought, conservation of wildlife is more important than ever especially with ever shrinking wetlands!
Cheers