Toddler clothes

So my daughter will ba starting daycare next month, she will be 18 months. Since it’s winter it’s going to be cold out, I was looking at all the clothes I have for her and most of her pants are light little leggings, she owns maybe 3 pairs of sweat pants and 2 pairs of fleece pants. She does have a warm snowsuit and fleece suit for our morning walk to daycare but should I be buying her some thicker pants? She also owns maybe 4 hoodies and 2 pull over sweatshirts