I wear these in the winter.
https://www.cyclegear.com/gear/bilt-...terproof-pants
warm, not exactly as waterproof as they lead you to believe. But their good enough to stay reasonably comfortable and dry-ish when I get to work. I haven't crash tested them and hope I don't. But there's a decent amount of added padding and knee/shin armor built in.
The piece of gear that's helped the most is gaiters. They close the gap between my boots and pants and let my socks keep me much warmer.