it also rains 1/2 the year here, or it's supposed to but you know, climate change is fuked and real and the temperate rain forest aint so rainy... regardless it's pretty damn wet most of the time from late september to may.
the first few years i lived here i tried getting away with being a cheapskate or lazy ass, wearing sneakers and my hoodie. doesn't work out.
i lucked out and found a pataguccia rain shell on the sidewalk and snatched it up before someone came to claim it. it's a size bigger than i need but i can throw on anything underneath. it's indispensable. light weight, rolls into a tight ball, and has a really dope hood. sometimes you can find em for like a hundred USD. any of the lightweight rain shells are gonna be good though. Patagonia has the best warranty/repair policy imo.
for footwear, 2 winters ago i picked up a pair of Xtra Tuff 15" legacy boots. they're spendy, but here you can find em on craigslist sometimes for 80 bucks or so, which is what i did. while 15" is tall, since they're neoprene you can just fold em down to whatever height you want and look like a pirate or someshit. they're easy on and easy off, size up so you can wear wool socks and they're the best winter wet boots EVER. they've got great grip as they're designed for wear on commercial fishing boats.
rain paints, well, i don't really fuck with em too much, but you don't really need to go super spendy since they're just a slide on over the regular pants thing.
go with wool under layers and socks, get the good shit, and it wicks water really well, doesn't stink, and is anti-microbial.
i used to know people who live in the forest, doing forest activist/defense shit year round. people literally sleeping in trees, logs, on the ground, etc and that's pretty commonly their rain gear kit. they're all broke as fuck because they don't have payng "jobs" but they don't cheap on this shit