Toronto is fun, Toronto is clean, and (in spite of what Vancouverites might say! , Toronto is friendly. As a native Torontonian, I can think of no better place to live and raise my kids, and my transplanted Westerner-of-a-husband begrudgingly agrees.
Summer is hot and humid, spring and fall are typically lovely. Our winters can be quite harsh, but there’s usually no major snow on the ground until December, so as long as you’re bundled you can still enjoy the outdoors. There’s plenty to enjoy indoors anyway!