My ACD absolutely loves the snow, can't stand hot weather. I've never seen her shiver even after being outside for hours. I don't think she'll ever need a coat!
Looks like Quinn is going to be the same. It snowed this morning and just a couple days ago we had to put the AC on in the truck because she was too hot - my mom and I were freezing, she was happy though! Oddly enough they were both born early August, you'd think that after being born in the summer they'd be okay with October temperatures.
We have bought clothes for the dogs before them, though. Our JRT would freeze in the winter. We'd go out for rides or walks in the fields and she'd try so hard to keep up but she'd have all this snow stuck to her belly and would be shivering like crazy so we'd have to pick her up and carry her home in our jackets. We'd buy her horse blanket style ones like this though, vs. sweaters.