The answer above is very good.
I would add that there are a lot of really great boots that are just as durable and warm and dry as classic light leather boots but weigh much less.
So you can have a very light boot that can handle hiking in wet snow and still be light enough to wear in warmer climates.
Consider how warm your feet stay. What kind of socks you use.
Gators help a lot.
For me, I wear a light summer hiking boot on Rainier with gators and my feet just get a little cold. If I wear a heavier boot on a short trip up there, my feet sweat so much that my feet get cold the next day anyway from wet boots. I use vapor barriers sometimes and that might be another consideration for you if you decide to go with a lighter boot.
There are also really good wool/nylon socks and liners out now that just bake my feet. Liner, vapor barrier, heavy sock, boot, gator. You can get slippage if your boot doesn't fit well so experiment.